[go: up one dir, main page]

CN113939072A - Shock wave focusing electric spark jet exciter - Google Patents

Shock wave focusing electric spark jet exciter Download PDF

Info

Publication number
CN113939072A
CN113939072A CN202111470161.3A CN202111470161A CN113939072A CN 113939072 A CN113939072 A CN 113939072A CN 202111470161 A CN202111470161 A CN 202111470161A CN 113939072 A CN113939072 A CN 113939072A
Authority
CN
China
Prior art keywords
tube
shock
shock wave
focusing
conversion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202111470161.3A
Other languages
Chinese (zh)
Other versions
CN113939072B (en
Inventor
陈真利
张燊
焦子涵
丁博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northwestern Polytechnical University
Beijing Institute of Near Space Vehicles System Engineering
Original Assignee
Northwestern Polytechnical University
Beijing Institute of Near Space Vehicles System Engineering
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Northwestern Polytechnical University, Beijing Institute of Near Space Vehicles System Engineering filed Critical Northwestern Polytechnical University
Priority to CN202111470161.3A priority Critical patent/CN113939072B/en
Publication of CN113939072A publication Critical patent/CN113939072A/en
Application granted granted Critical
Publication of CN113939072B publication Critical patent/CN113939072B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches
    • H05H1/32—Plasma torches using an arc
    • H05H1/34—Details, e.g. electrodes, nozzles
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00—Generating plasma; Handling plasma
    • H05H1/24—Generating plasma
    • H05H1/26—Plasma torches

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Plasma Technology (AREA)

Abstract

The invention discloses a shock wave focusing electric spark jet exciter which comprises a plasma exciting tube, a shock wave conversion tube and a shock wave focusing tube, wherein the plasma exciting tube, the shock wave conversion tube and the shock wave focusing tube are sequentially communicated from head to tail. The invention relates to a shock wave focusing electric spark jet exciter which is an improvement on a common shock wave tube and changes the external shape of an initial low-pressure section cavity of the common shock wave tube into a smooth contraction shape. The internal cavity structure of the shock wave focusing electric spark jet actuator comprises three parts: the plasma excitation area, the shock wave conversion area and the shock wave focusing area are characterized in that the sections of the inner cavity of the plasma excitation area, the shock wave conversion area and the shock wave focusing area in the direction vertical to the horizontal axis (the jet flow direction) are a series of circles with different diameters, the tube structure enables the shock waves to be gradually focused in the movement process of the cavity of the contraction section, the shock wave intensity is increased, and the jet flow speed and energy can be greatly improved under the condition that the discharge excitation energy is not changed.

Description

Shock wave focusing electric spark jet exciter
Technical Field
The invention relates to the technical field of flow control, in particular to a shock wave focusing electric spark jet exciter.
Background
In recent years, with the development and application of optical measurement means in high-speed flow, the research on physical laws and aerodynamic forces in high-speed high-Reynolds-number jet flow can be more detailed. Where experimental studies on mixing of jets and high velocity flow boundary layers have an immeasurable role in the development of jet applications in flow control.
In practice, the active control effect of the jet on the flow depends on the development of a jet actuator with high reliability, low energy consumption, low power, high sensitivity. In the field of flow control, a wide variety of actuators have been developed, including lorentz force actuators, piezoelectric oscillation actuators, synthetic jet actuators, and combustion-driven jet actuators.
The spark jet exciter can control high-speed flow under the condition of not changing the pneumatic structure of an object, and does not generate high-speed jet to penetrate through a supersonic (or subsonic) boundary layer by means of a movable mechanical structure. The method has strong application potential in the control of delaying transition from laminar flow to turbulent flow, reattaching a separated boundary layer, enhancing the bottom energy of the boundary layer, mixing the boundary layer and the like, and can achieve the effects of resistance reduction and lift increase on the flow of wing profiles, wings and the like. The physical laboratory at john hopkins university has made a great deal of work on the concept proposition and design of spark jet actuators, as well as later experimental and numerical simulation studies. The existing patents are: US2004/0021041A1, along with "SPARKJET ACTUATORS FOR FLOW CONTROL (AIAA 2003-57)" and "CHARACTERIZATION OF SPARKJET ACTUATORS FOR FLOW CONTROL (AIAA 2004-89)" have detailed tests and numerical simulation studies on first and second generation spark jet ACTUATORS. After discharge excitation, high-temperature and high-pressure plasma gas flows in the cavity of the traditional first-generation and second-generation electric spark jet exciters, the shape change in the cavity is not smooth enough, so that a complex vortex structure is generated, the loss of gas kinetic energy in the cavity is large, the speed and energy of jet flow cannot reach an ideal effect directly, and the energy utilization efficiency of the existing jet flow exciters is generally low. In summary, if the traditional spark jet exciter is adopted, large input energy is needed in actual flow control, and the efficiency is not high.
Disclosure of Invention
The invention provides a shock wave focusing electric spark jet exciter, which aims to overcome the defects of poor jet effect, low efficiency, high energy consumption and the like in the existing jet exciter.
The invention provides a shock wave focusing electric spark jet exciter, comprising:
the plasma excitation tube, the shock wave conversion tube and the shock wave focusing tube are sequentially communicated from head to tail;
the inner cavity of the plasma excitation tube is a plasma excitation area, and the tube body of the plasma excitation tube is cylindrical;
the inner cavity of the shock wave conversion pipe is a shock wave conversion area, the contour line of the cross section of the pipe wall of the shock wave conversion pipe, which is vertical to the central axis, is a series of circles with different diameters, the radiuses of the circles are sequentially decreased progressively along the jet flow direction, and the contour line of the axial section of the shock wave conversion pipe is an elliptical arc which is symmetrically distributed up and down;
the inner cavity of the shock wave focusing tube is a shock wave focusing area, and the shape of the tube body of the shock wave focusing tube is a cone frustum;
the first end of the shock wave conversion tube is communicated with the plasma excitation tube, the second end of the shock wave conversion tube is communicated with the first end of the shock wave focusing tube, and the second end of the shock wave focusing tube is a jet flow outlet;
the inner diameter of the pipe orifice of the first end of the shock wave conversion pipe is larger than that of the pipe orifice of the second end of the shock wave conversion pipe, and the inner diameter of the pipe orifice of the first end of the shock wave focusing pipe is larger than that of the pipe orifice of the second end of the shock wave focusing pipe.
Preferably, the parameter equation of the elliptical arc is as follows:
Figure BDA0003391515460000031
the x axis is parallel to the central axis of the shock wave conversion pipe, and the pipe orifice pipe wall of the second end of the shock wave conversion pipe is positioned on the x axis;
the y axis is vertical to the central axis of the shock wave conversion pipe, and the pipe orifice pipe wall of the first end of the shock wave conversion pipe is positioned on the y axis;
C1the length of the tube body of the shock wave conversion tube;
C3the inner radius of the tube body at the first end of the shock wave conversion tube;
C2the difference between the inner radius of the first end of the shock wave conversion tube and the inner radius of the first end of the shock wave focusing tube is obtained;
phi is the centrifugal angle of the elliptic arc, wherein phi is more than or equal to 0 and less than or equal to 0.5 pi.
Preferably, the length of the tube body of the shock wave conversion tube is greater than the inner radius of the tube body of the first end of the shock wave conversion tube.
Preferably, the length of the tube body of the shock wave conversion tube is greater than the length of the tube body of the plasma excitation tube and the length of the tube body of the shock wave focusing tube.
Preferably, an electric spark discharge exciter is arranged in the plasma exciting pipe, and the electric spark discharge exciter adopts periodic excitation.
Preferably, the pipe wall contour line of the axial section of the shock wave focusing pipe is tangent to the pipe wall contour line of the axial section of the shock wave conversion pipe, and the connection point of the pipe wall of the shock wave conversion pipe and the pipe wall of the shock wave focusing pipe is a tangent point.
Preferably, the inner cavities of the plasma excitation tube, the shock wave conversion tube and the shock wave focusing tube are all made of insulating ceramic materials, and the outer walls of the plasma excitation tube, the shock wave conversion tube and the shock wave focusing tube are all made of brass alloy materials.
Compared with the prior art, the invention has the beneficial effects that:
the shock wave focusing tube of the novel shock wave focusing electric spark jet exciter is an improvement on a common shock wave tube, the shape of an initial low-pressure section cavity of the common shock wave tube is changed into a smooth contraction shape, and the internal cavity structure of the shock wave focusing electric spark jet exciter comprises three parts: the plasma body structure comprises a spark discharge plasma excitation area, a shock wave conversion area and a tail conical shock wave focusing area, wherein the cross sections of cavities of the shock wave conversion area and the tail conical shock wave focusing area in the direction vertical to the horizontal axis (the jet flow direction) are a series of circles with different diameters, so that shock waves are gradually focused in the motion process of the cavities of a contraction section by the aid of the tube body structure, and the shock wave intensity is increased. The invention can greatly improve the speed and the energy of the jet flow under the condition of not changing the discharge excitation energy.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic cross-sectional structure diagram of a cavity of a shock wave focusing spark jet actuator according to the present invention;
FIG. 2 is a schematic side view of a cavity of a shock wave focusing spark jet actuator according to the present invention;
FIG. 3 is a jet velocity-time curve of the central axis of a shock wave focusing spark jet actuator and a second generation spark jet actuator at the respective outlets;
FIG. 4 is a jet velocity-time curve of a point on a central axis at a distance of 2.68mm from an outlet of each of a shock wave focusing spark jet actuator and a second generation spark jet actuator, which are provided by the present invention;
FIG. 5 is a jet velocity-time curve of a point on a central axis at a distance of 5.68mm from an outlet of each of a shock wave focusing spark jet actuator and a second generation spark jet actuator according to the present invention;
FIG. 6 is a Mach number cloud diagram of a shock wave focusing electric spark jet actuator provided by the invention at the moment that the farthest distance from an outlet is 2.5mm in a jet center high-speed area;
FIG. 7 is a velocity cloud chart of a shock wave focusing spark jet actuator in the x-axis direction at the moment that the maximum distance from the outlet of the shock wave focusing spark jet actuator is 2.5mm in the high-speed region of the jet center;
FIG. 8 is a Mach number cloud diagram of a shock wave focusing electric spark jet actuator provided by the invention at the moment that the farthest distance from an outlet is 10mm in a jet center high-speed area;
FIG. 9 is a velocity cloud chart of a shock wave focusing spark jet actuator in the x-axis direction at the moment that the maximum distance from the outlet of the high-speed area of the jet center is 10 mm;
FIG. 10 is a Mach number cloud of a second generation spark jet actuator at a time when the jet center high-speed region is 2.5mm farthest from the outlet;
FIG. 11 is a velocity cloud in the x-axis direction of a second generation spark jet actuator at the moment when the jet center high-velocity region is farthest from the outlet by 2.5 mm;
FIG. 12 is a Mach number cloud of a second generation spark jet actuator at the time when the jet center high-speed region is 10mm farthest from the outlet;
fig. 13 is a velocity cloud in the x-axis direction of the second generation spark jet actuator at the moment when the central high-velocity zone of the jet is 10mm farthest from the outlet.
Description of reference numerals:
2-electric spark discharge exciter, 101-plasma exciting tube, 102-shock wave conversion tube, 103-shock wave focusing tube and 1021-elliptic arc.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, but it should be understood that the scope of the present invention is not limited by the specific embodiments.
Examples
As shown in fig. 1 to 13, a shock wave focusing electric spark jet exciter comprises a plasma exciting tube 101, a shock wave conversion tube 102 and a shock wave focusing tube 103 which are sequentially communicated end to end, wherein an internal cavity of the plasma exciting tube 101 is a plasma exciting area, the body of the plasma exciting tube 101 is cylindrical, an electric spark discharge exciter 2 is arranged in the plasma exciting tube 101, and the electric spark discharge exciter 2 adopts periodic excitation. The inner cavity of the shock wave conversion pipe 102 is a shock wave conversion area, the cross section contour line of the pipe wall of the shock wave conversion pipe 102, which is perpendicular to the central axis, is a series of circles with different diameters, the radiuses of the circles are sequentially decreased progressively along the jet flow direction, and the contour line of the shock wave conversion pipe 102 along the axial section is an elliptical arc 1021 which is symmetrically distributed up and down. The inner cavity of the shock wave focusing tube 103 is a shock wave focusing area, the shape of the tube body of the shock wave focusing tube 103 is a cone frustum, the first end of the shock wave conversion tube 102 is communicated with the plasma excitation tube 101, the second end of the shock wave conversion tube 102 is communicated with the first end of the shock wave focusing tube 103, the second end of the shock wave focusing tube 103 is a jet flow outlet, the inner diameter of the tube orifice of the first end of the shock wave conversion tube 102 is larger than that of the tube orifice of the second end of the shock wave conversion tube 102, and the inner diameter of the tube orifice of the first end of the shock wave focusing tube 103 is larger than that of the tube orifice of the second end of the shock wave focusing tube 103.
In the invention, in the control of the jet flow on the flow, the electric spark discharge exciter 2 is controlled by an external circuit to discharge so as to realize periodic discharge excitation and generate periodic jet flow, and because the duration of the electric spark discharge excitation process is a few microseconds, and the duration of the jet flow process is about one millisecond, the electric spark discharge response time is short, a complex mechanical actuation structure is not needed, and the time required by the process from the control of the electric spark discharge to the completion of the electric spark discharge process is short. The jet effect can be greatly improved. The discharge in the internal cavity of the plasma excitation tube 101 causes local air ionization in the internal cavity of the plasma excitation tube 101, the temperature and pressure in the internal cavity of the plasma excitation tube 101 increase, the duration of this process is extremely short, and therefore the gas density in the internal cavity of the plasma excitation tube 101 remains almost constant at the instant. The high-temperature high-pressure plasma gas in the inner cavity of the plasma excitation tube 101 forms local shock waves, flows along with the gas, and is ejected from the outlet of the plasma excitation tube 101 to form jet flow.
The gas is sprayed out from the outlet of the plasma exciting tube 101 and enters the shock wave conversion tube 102, the gas generates pressure and temperature discontinuity at the boundary of the shock wave conversion tube 102 and the plasma exciting tube 101, and a positive shock wave is generated and transmitted to the low-pressure area along with the expansion of the high-pressure gas to the low-pressure area. Since the cavity contour shape of the shock wave transformation tube 102 is an ellipsoid surface which changes gradually, the normal shock wave propagating along the straight line is gradually transformed into the spherical shock wave in the propagation process, and the shock wave is focused continuously because the cross-sectional area of the spherical shock wave is gradually reduced. The shock wave focused by the shock wave conversion tube 102 enters the shock wave focusing tube 103, and the spherical shock wave entering the shock wave focusing tube 103 is focused into a point and then ejected from the jet flow outlet because the tube body of the shock wave focusing tube 103 is in the shape of a cone frustum. After single discharge excitation, the normal shock wave in the cavity is converted into spherical shock wave and focused, so that the invention is called as a shock wave focusing electric spark jet exciter.
In practical application, according to practical situations:
setting a tube length value and a tube inner radius value of the plasma exciting tube 101;
setting the inner radius of the tube body at the first end, the inner radius value of the tube body at the second end and the length value of the tube body of the shock wave focusing tube 103;
the length value of the tube body of the shock wave conversion tube 102 is set, the inner tube radius value of the plasma excitation tube 101 is used as the inner tube radius value of the first end of the shock wave conversion tube 102, and the inner tube radius value of the first end of the shock wave focusing tube 103 is used as the inner tube radius value of the second end of the shock wave conversion tube 102.
The spatial shape of the plasma excitation tube 101 in this embodiment is a cylinder, and it is assumed that the diameter of the circular cross section of the cylinder is 60mm, and the height of the cylinder is 1.5 mm. The spatial shape of the shock wave focusing tube 103 is a truncated cone, the height of the truncated cone is 5mm, the diameter of the tube body at the first end of the shock wave focusing tube 103 is 25mm, the diameter of the tube body at the second end of the shock wave focusing tube 103 is 0.33mm, the diameter of the tube body at the first end of the shock wave conversion tube 102 is 60mm, and the diameter of the tube body at the second end of the shock wave conversion tube 102 is 25 mm.
Then, the tube wall contour line of the section of the shock wave conversion tube 102 along the axial direction is determined according to the parameter equation of the elliptical arc 1021, the parameter equation of the elliptical arc 1021 is,
Figure BDA0003391515460000081
wherein the x-axis is parallel to the central axis of the shock wave conversion tube 102, and the tube orifice wall of the second end of the shock wave conversion tube 102 is located on the x-axis;
the y axis is perpendicular to the central axis of the shock wave conversion tube 102, and the tube orifice tube wall at the first end of the shock wave conversion tube 102 is located on the y axis;
the length C of the shock wave conversion tube 102 is set in this embodiment1＝245mm，
The inner radius C of the first end of the shock tube 1023＝60mm；
The difference C between the inner radius of the first end of the shock wave conversion tube 102 and the inner radius of the first end of the shock wave focusing tube 1032＝35mm；
Phi is the centrifugal angle of the elliptic arc 1021, wherein phi is more than or equal to 0 and less than or equal to 0.5 pi.
C is to be1、C2、C3The value of (A) is substituted into a parameter equation of the elliptical arc 1021, so that corresponding points on the elliptical arc 1021 at different centrifugal angles phi can be obtained, and the points are sequentially connected, thereby obtaining a contour line of the elliptical arc 1021 and obtaining the elliptical arc 1021. The body profile of the shock tube 102 is obtained by rotating the elliptical arc 1021 about the inner central axis of the shock tube 102 a single revolution.
Finally, the pipe wall thickness of each pipe body in the flow exciter 1 is set according to the actual situation.
The shape of the shock wave focusing tube 1 can be established through the steps. C above1、C2、C3The value is only a numerical value setting method, C, set in the present embodiment1、C2、C3Preferable values of (b) are not limited thereto.
The length of the tube body of the shock wave conversion tube 102 is greater than the inner radius of the tube body at the first end of the shock wave conversion tube 102, and the shock waves moving and propagating in the shock wave conversion tube 102 can be sufficiently gradually focused due to the gradually reduced section of the inner cavity because the normal shock waves propagating along a straight line entering the shock wave conversion tube 102 are gradually converted into spherical shock waves in the propagation process.
The length of the tube body of the shock wave conversion tube 102 is greater than that of the plasma excitation tube 101, so that shock waves in the plasma excitation tube 101 can rapidly enter the shock wave conversion tube 102 to be gradually focused, the length of the tube body of the shock wave conversion tube 102 is greater than that of the shock wave focusing tube 103, and focused shock waves can be rapidly released from the shock wave focusing tube 103.
The tube wall contour line of the shock wave focusing tube 103 along the axial section is tangent to the tube wall contour line of the shock wave conversion tube 102 along the axial section, the connection point of the tube wall of the shock wave conversion tube 102 and the tube wall of the shock wave focusing tube 103 is a tangent point, so that the connection point of the shock wave conversion tube 102 and the shock wave focusing tube 103 is in a smooth contraction shape, the shock waves emitted from the shock wave conversion tube 102 enter the shock wave focusing tube 103 and are focused again, and the shock wave intensity is increased.
The internal cavities of the plasma excitation tube 101, the shock wave conversion tube 102 and the shock wave focusing tube 103 in the embodiment are all made of insulating ceramic materials, and the outer walls of the plasma excitation tube, the shock wave conversion tube and the shock wave focusing tube are all made of brass alloy materials.
And (3) adding 21.06mJ of spark discharge energy to a shock wave focusing electric spark jet actuator with the diameter of an orifice of 0.33mm to perform CFD (computational fluid dynamics) numerical simulation analysis on the expansion process of high-temperature and high-pressure plasma gas in the cavity and the flow process after jet ejection. Meanwhile, the same amount of discharge energy as the second generation electric spark jet exciter with the same jet hole diameter is added to the second generation electric spark jet exciter, and CFD numerical simulation analysis is carried out to obtain the gas expansion process inside the cavity and the flowing process after jet flow is ejected. By taking each point at different positions on the respective central axes, a curve of the change of the gas velocity at each point with time is made. By comparing the speed-time curves at the jet outlet and at three points 2.68mm and 5.68mm away from the jet outlet, the jet speed of the shock wave focusing electric spark jet actuator is higher than that of the second generation electric spark jet actuator. The maximum speed of the jet is increased by 43%, and the penetration distance is increased by 35%.
Finally, the description is as follows: the above disclosure is only one specific embodiment of the present invention, however, the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.

Claims (7)

1.一种激波聚焦电火花射流激励器，其特征在于，包括：1. a shock focused electric spark jet exciter, is characterized in that, comprises: 首尾依次连通的等离子体激励管(101)、激波转变管(102)、激波聚焦管(103)；a plasma excitation tube (101), a shock wave conversion tube (102), and a shock wave focusing tube (103) that are communicated end to end in sequence; 所述等离子体激励管(101)的内部腔体为等离子体激励区，所述等离子体激励管(101)的管体外形为圆柱形；The inner cavity of the plasma excitation tube (101) is a plasma excitation area, and the shape of the tube body of the plasma excitation tube (101) is cylindrical; 所述激波转变管(102)的内部腔体为激波转变区，所述激波转变管(102)的管壁垂直于中心轴线的横截面轮廓线为一系列直径不同的圆形，一系列所述圆形的半径沿射流方向依次递减，所述激波转变管(102)沿轴向截面的轮廓线为上下相互对称分布的椭圆弧(1021)；The internal cavity of the shock conversion tube (102) is a shock conversion area, and the cross-sectional contour line of the tube wall of the shock conversion tube (102) perpendicular to the central axis is a series of circles with different diameters. The radius of the series of circles decreases sequentially along the jet flow direction, and the contour line of the shock wave conversion tube (102) along the axial section is an elliptical arc (1021) symmetrically distributed up and down; 所述激波聚焦管(103)的内部腔体为激波聚焦区，所述激波聚焦管(103)的管体外形为圆锥台；The internal cavity of the shock focusing tube (103) is a shock focusing area, and the shape of the tube body of the shock focusing tube (103) is a truncated cone; 所述激波转变管(102)的第一端与等离子体激励管(101)相连通，所述激波转变管(102)的第二端与激波聚焦管(103)的第一端相连通，所述激波聚焦管(103)的第二端为射流出口；The first end of the shock conversion tube (102) is connected with the plasma excitation tube (101), and the second end of the shock conversion tube (102) is connected with the first end of the shock focusing tube (103) the second end of the shock focusing tube (103) is the jet outlet; 所述激波转变管(102)的第一端的管口内径大于激波转变管(102)的第二端的管口内径，所述激波聚焦管(103)的第一端的管口内径大于激波聚焦管(103)的第二端的管口内径。The inner diameter of the first end of the shock conversion tube (102) is larger than the inner diameter of the second end of the shock conversion tube (102), and the inner diameter of the first end of the shock focusing tube (103) Greater than the inner diameter of the second end of the shock focusing tube (103). 2.根据权利要求1所述的一种激波聚焦电火花射流激励器，其特征在于：所述椭圆弧(1021)的参数方程为：2. a kind of shock focusing electric spark jet exciter according to claim 1, is characterized in that: the parametric equation of described elliptical arc (1021) is:
Figure FDA0003391515450000011
Figure FDA0003391515450000011
 其中x轴与所述激波转变管(102)的中心轴线相平行，且所述激波转变管(102)的第二端的管口管壁位于x轴上；Wherein the x-axis is parallel to the central axis of the shock wave conversion tube (102), and the nozzle wall of the second end of the shock wave conversion tube (102) is located on the x-axis; y轴与所述激波转变管(102)的中心轴线相垂直，且所述激波转变管(102)的第一端的管口管壁位于位于y轴上；The y-axis is perpendicular to the central axis of the shock wave conversion tube (102), and the orifice tube wall of the first end of the shock wave conversion tube (102) is located on the y-axis; C1为所述激波转变管(102)的管体长度；C 1 is the body length of the shock conversion tube (102); C3为所述激波转变管(102)的第一端的管体内半径；C3 is the inner radius of the first end of the shock conversion tube (102); C2为所述激波转变管(102)的第一端的管体内半径与所述激波聚焦管(103)的第一端的管体内半径之差；C 2 is the difference between the inner radius of the first end of the shock conversion tube (102) and the inner radius of the first end of the shock focusing tube (103); φ为所述椭圆弧(1021)的离心角，其中0≤φ≤0.5π。φ is the centrifugal angle of the elliptical arc (1021), where 0≤φ≤0.5π. 3.根据权利要求2所述的一种激波聚焦电火花射流激励器，其特征在于：所述激波转变管(102)的管体长度大于所述激波转变管(102)的第一端的管体半径。3. A shock-focusing spark jet exciter according to claim 2, characterized in that: the length of the tube body of the shock-conversion tube (102) is greater than the first length of the shock-conversion tube (102). The radius of the tube body at the end. 4.根据权利要求1所述的一种激波聚焦电火花射流激励器，其特征在于：所述激波转变管(102)的管体长度大于所述等离子体激励管(101)的管体长度及所述激波聚焦管(103)的管体长度。4. A shock-focusing spark jet exciter according to claim 1, characterized in that: the length of the tube body of the shock wave conversion tube (102) is greater than the tube body of the plasma excitation tube (101) length and the length of the tube body of the shock focusing tube (103). 5.根据权利要求1所述的一种激波聚焦电火花射流激励器，其特征在于：所述等离子体激励管(101)内设有电火花放电激励器(2)，所述电火花放电激励器(2)采用周期性激励。5 . The shock-focusing electric spark jet exciter according to claim 1 , wherein the plasma excitation tube ( 101 ) is provided with an electric spark discharge exciter ( 2 ), and the electric spark discharge The exciter (2) adopts periodic excitation. 6.根据权利要求1所述的一种激波聚焦电火花射流激励器，其特征在于：所述激波聚焦管(103)沿轴向截面的管壁轮廓线与激波转变管(102)沿轴向截面的管壁轮廓线相切，所述激波转变管(102)的管壁与激波聚焦管(103)的管壁的连通点为相切点。6. A shock-focusing electric spark jet exciter according to claim 1, wherein the shock-focusing tube (103) has a wall profile along the axial section and the shock-converting tube (102) The contour line of the tube wall along the axial section is tangent, and the connection point between the tube wall of the shock wave conversion tube (102) and the tube wall of the shock wave focusing tube (103) is the tangent point. 7.根据权利要求1所述的一种激波聚焦电火花射流激励器，其特征在于：所述等离子体激励管(101)、激波转变管(102)、激波聚焦管(103)的内部腔体均由绝缘的陶瓷材料制成，外壁均由黄铜合金材料制成。7 . The shock-focusing electric spark jet exciter according to claim 1 , wherein: the plasma excitation tube (101), the shock-conversion tube (102), and the shock-focusing tube (103) have The inner cavity is made of insulating ceramic material, and the outer wall is made of brass alloy material.
CN202111470161.3A 2021-12-03 2021-12-03 A shock wave focusing electric spark jet exciter Active CN113939072B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111470161.3A CN113939072B (en) 2021-12-03 2021-12-03 A shock wave focusing electric spark jet exciter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111470161.3A CN113939072B (en) 2021-12-03 2021-12-03 A shock wave focusing electric spark jet exciter

Publications (2)

Publication Number Publication Date
CN113939072A true CN113939072A (en) 2022-01-14
CN113939072B CN113939072B (en) 2024-11-05

Family

ID=79288808

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111470161.3A Active CN113939072B (en) 2021-12-03 2021-12-03 A shock wave focusing electric spark jet exciter

Country Status (1)

Country Link
CN (1) CN113939072B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2630107A (en) * 2023-05-17 2024-11-20 First Light Fusion Ltd Component for Manipulating an Input Shockwave

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040021041A1 (en) * 2002-06-18 2004-02-05 Grossman Kenneth R. Sparkjet actuator
RU2250530C2 (en) * 2003-06-25 2005-04-20 Институт проблем механики Российской Академии наук Laser-plasma ion and radiation source
US20160037618A1 (en) * 2014-07-30 2016-02-04 American Torch Tip Company Smooth Radius Nozzle for use in a Plasma Cutting device
CN106777700A (en) * 2016-12-19 2017-05-31 中国科学技术大学 A kind of shock wave Enhancement Method for shock tube
CN108331665A (en) * 2018-03-29 2018-07-27 中国科学院力学研究所 Rotatable air intake duct Fast design method in the hypersonic variable cross-section of full flow capture
CN108566718A (en) * 2018-03-30 2018-09-21 西北工业大学 A kind of high frequency plasma excitation device for flowing control
KR20190030664A (en) * 2019-03-04 2019-03-22 광운대학교 산학협력단 Plume controllable surface-discharged low temperature atmospheric pressure plasma jet
CN109896027A (en) * 2019-04-10 2019-06-18 南京航空航天大学 A kind of bump inlet and Boundary layer flow method based on plasma synthesis jet stream

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040021041A1 (en) * 2002-06-18 2004-02-05 Grossman Kenneth R. Sparkjet actuator
RU2250530C2 (en) * 2003-06-25 2005-04-20 Институт проблем механики Российской Академии наук Laser-plasma ion and radiation source
US20160037618A1 (en) * 2014-07-30 2016-02-04 American Torch Tip Company Smooth Radius Nozzle for use in a Plasma Cutting device
CN106777700A (en) * 2016-12-19 2017-05-31 中国科学技术大学 A kind of shock wave Enhancement Method for shock tube
CN108331665A (en) * 2018-03-29 2018-07-27 中国科学院力学研究所 Rotatable air intake duct Fast design method in the hypersonic variable cross-section of full flow capture
CN108566718A (en) * 2018-03-30 2018-09-21 西北工业大学 A kind of high frequency plasma excitation device for flowing control
KR20190030664A (en) * 2019-03-04 2019-03-22 광운대학교 산학협력단 Plume controllable surface-discharged low temperature atmospheric pressure plasma jet
CN109896027A (en) * 2019-04-10 2019-06-18 南京航空航天大学 A kind of bump inlet and Boundary layer flow method based on plasma synthesis jet stream

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
郝琳召;张彬乾;陈真利;: "纳秒等离子体激励控制翼型流动分离机理研究", 航空工程进展, no. 01, 28 February 2014 (2014-02-28) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2630107A (en) * 2023-05-17 2024-11-20 First Light Fusion Ltd Component for Manipulating an Input Shockwave

Also Published As

Publication number Publication date
CN113939072B (en) 2024-11-05

Similar Documents

Publication Publication Date Title
Zhang et al. Active control for wall drag reduction: Methods, mechanisms and performance
CN110160734A (en) Wind tunnel nozzle, active noise reducing device and method based on porous media
Anchen et al. Transient flow characteristics and performance of a solid rocket motor with a pintle valve
Murugan et al. Recent Developments on Synthetic Jets.
Kontis et al. Compressible vortex-ring interaction studies with a number of generic body configurations
Hong Effectiveness of micro synthetic jet actuator enhanced by flow instability in controlling laminar separation caused by adverse pressure gradient
Ja'fari et al. Synthetic jet actuators: Overview and applications
CN113939072A (en) Shock wave focusing electric spark jet exciter
Kumar et al. Characteristics of a supersonic elliptic jet
CN207610837U (en) Air-flow driver
CN205423089U (en) Efflux thrust vector device based on plasma flow moves control
CN109827737B (en) Variable outlet synthetic jet actuator
Chauhan et al. Aspect ratio effect on elliptical sonic jet mixing
CN116256143B (en) Integrated structure of pipe wind tunnel spray pipe and test section and operation method
CN118622517A (en) A detached shock wave thrust vector control device for a solid rocket engine
CN115138494B (en) Device and method for actively controlling cavitation water jet to strengthen inner surface of micro hole
CN113908710B (en) Micro-nano bubble generator and method
Xia et al. Effects of a needle on shrouded Hartmann-Sprenger tube flows
Uruba Flow control using synthetic jet actuators
CN213932008U (en) Supersonic rotary spray pipe
Wu et al. Effect of multi-parameter optimization of water-laser coupling device and nozzle geometry on the stability of water-guided laser beam
Zmijanovic et al. Thrust shock vector control of an axisymmetric cd nozzle via transverse gas injection
Mills et al. Asymmetric control of subsonic axisymmetric jet aerodynamics using plasma actuators
Khramtsov et al. Investigation of vortex ring formation with account of generator piston motion
Mallinson et al. Synthetic jet actuators for flow control

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant