CN210071144U - Arc Wind Tunnel Thermal-Infrared Transmission Joint Test Device - Google Patents

Abstract

An electric arc wind tunnel heat-infrared transmission combined test device relates to the field of aircraft ground aerodynamic heat test research; the device comprises an electric arc heater, a spray pipe, an optical side window hood, a target generator, an observation window, a light-transmitting cylinder, a thermal infrared imager, a ground refrigeration air source and a vacuum test chamber; the axial inlet end of the spray pipe is butted with the electric arc heater; the axial outlet end of the spray pipe extends into the vacuum test chamber; the optical side window hood is arranged at the position of the outlet end of the spray pipe; the observation window is arranged corresponding to the optical side window hood; the target generator is arranged at the outer side of the vacuum test chamber and is arranged corresponding to the observation window; the thermal infrared imager is correspondingly arranged at a position opposite to the target generator; the light-transmitting cylinder is arranged between the thermal infrared imager and the optical side window head cover; the ground refrigeration air source realizes the cooling of the optical side window hood; the utility model discloses a develop infrared terminal guidance hood complete machine heat-infrared transmission effect joint test, provide infrared guidance transmission operational environment's wind-tunnel ground simulation ability.

Description

Arc Wind Tunnel Thermal-Infrared Transmission Joint Test Device

technical field

The utility model relates to the research field of aerodynamic thermal test on the ground of an aircraft, in particular to an arc wind tunnel thermal-infrared transmission combined test device.

Background technique

The development of aerospace technology and new weapon technology in various countries has attracted more and more attention to guided weapon technology. The United States, Russia and China have successively developed hypersonic aircraft. The United States has developed and deployed THAAD, Arrow-2 missile systems, Ground-based defense systems, etc. all use the direction of infrared imaging guidance to improve the accuracy of the aircraft. A hypersonic vehicle using infrared guidance re-enters the atmosphere, the surface of the infrared side window is aerodynamically heated, and shock waves are generated on the surface of the model. At this time, the flow field on the surface of the side window will produce complex shock waves, boundary layer interference, separation and rotation. , When the infrared beam is transmitted in the flow field, due to the violent change of the density gradient, deflection, scattering and absorption will occur, and aero-optical effects will occur. The existence of aero-optical effects will challenge the detection of infrared targets, and the infrared targets will produce blur, distortion, jitter, offset and energy attenuation in the seeker imaging target. Therefore, it is very necessary to carry out ground test research on infrared guidance of hypersonic aircraft, and it is the basic demonstration method for weaponization of hypersonic guidance system. At present, there is no ground test device in the existing technology that can fully simulate the research on the aero-optical effect of the hypersonic aircraft under the aerodynamic heating condition. The joint test of the thermal-infrared transmission effect of the infrared terminal guidance hood is being carried out to provide a working environment for infrared guidance and transmission. The wind tunnel ground aspect lacks simulation capabilities.

Utility model content

The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art, and to provide an arc wind tunnel thermal-infrared transmission joint test device, which realizes the joint experiment of the thermal-infrared transmission effect of the whole machine of the infrared terminal guidance hood, and provides infrared guidance transmission. Wind tunnel ground simulation capability of the working environment.

The above-mentioned purpose of the present utility model is achieved through the following technical solutions:

Arc wind tunnel thermal-infrared transmission combined test device, including arc heater, nozzle, optical side window hood, target generator, observation window, light tube, infrared thermal imager, ground cooling air source and vacuum test chamber; Among them, the arc heater is placed horizontally, and the axial inlet end of the nozzle is docked with the arc heater; the axial outlet end of the nozzle extends into the interior of the vacuum test chamber; the optical side window head cover is arranged at the outlet end of the nozzle; the observation window is arranged On the side wall of the vacuum test chamber; and the observation window corresponds to the position of the optical side window head cover; the target generator is set on the outside of the vacuum test chamber, and the target generator is placed corresponding to the observation window; the infrared thermal imager is correspondingly placed in the vacuum test chamber The outside of the cabin is placed opposite the target generator; the light tube is set between the infrared thermal imager and the optical side window hood; the ground cooling air source is set outside the vacuum test chamber to cool the optical side window hood .

In the above-mentioned arc wind tunnel thermal-infrared transmission combined test device, the arc heater adopts one of a high-enthalpy laminated arc heater, a medium-enthalpy segmented arc heater, or a low-enthalpy AC arc heater.

In the above-mentioned arc wind tunnel thermal-infrared transmission combined test device, the nozzle is a supersonic profile nozzle.

In the above-mentioned arc wind tunnel thermal-infrared transmission joint test device, the target generator is an infrared target generator, which realizes the generation of infrared band test targets.

In the above-mentioned arc wind tunnel thermal-infrared transmission combined test device, the optical side window head cover is a hollow cone structure; the cone top of the optical side window head cover is axially directed to the nozzle outlet; and the optical side window head cover Placed along the axially offset nozzle axis.

In the above-mentioned arc wind tunnel thermal-infrared transmission combined test device, an infrared window is provided on the side wall of the optical side window head cover close to the axis of the nozzle; the side wall of the optical side window head cover and the side wall opposite to the infrared window are correspondingly provided with through holes .

In the above-mentioned arc wind tunnel thermal-infrared transmission joint test device, the center of the infrared window is located on the axis of the nozzle; and the horizontal distance between the center of the infrared window and the nozzle outlet is 150-300mm; One end of the axial direction is connected; the target generator, the observation window, the infrared window, the through hole, the light-passing tube and the infrared thermal imager are placed in sequence along the axis of the light-passing tube.

In the above-mentioned arc wind tunnel thermal-infrared transmission joint test device, the infrared thermal imager adopts a medium-wave thermal imager or a long-wave thermal imager; the wavelength of the medium-wave thermal imager is 4-5 μm; the wavelength of the long-wave thermal imager is 10 μm. -12μm.

In the above-mentioned arc wind tunnel thermal-infrared transmission combined test device, the light-passing tube is a hollow cylindrical structure; the light-passing tube is a three-layer structure, and the middle layer is made of stainless steel; the inner wall is coated with black paint; the outer wall is made of ceramics Tile heat protection material.

In the above-mentioned arc wind tunnel thermal-infrared transmission combined test device, the ground refrigeration gas source outputs nitrogen to cool the inner wall of the infrared window; the ground refrigeration gas source outputs nitrogen at a speed of 10-200 g/s.

Compared with the prior art, the utility model has the following advantages:

(1) The utility model provides the test capability of the thermal-aero-optical infrared transmission joint test ground assessment of the infrared guidance of the hypersonic aircraft, which can simulate the re-entry heat and hypersonic environment of the hypersonic aircraft, thereby realizing more efficient aero-optical effects of the aircraft. Real ground simulation;

(2) The utility model applies a high-power arc heater to simulate the thermal environment of a hypersonic aircraft, and can achieve a maximum equipment operation capacity of 50MW.

Description of drawings

FIG. 1 is a schematic diagram of the thermal-infrared transmission joint test device of the present invention.

Detailed ways

Below in conjunction with the accompanying drawings and specific embodiments, the present utility model is described in further detail:

The utility model provides an arc wind tunnel thermal-infrared transmission combined test device, which can be used to carry out a combined thermal-infrared transmission effect test of an infrared terminal guidance hood, and provides the wind tunnel ground simulation capability of the infrared guidance transmission working environment .

Figure 1 is a schematic diagram of the thermal-infrared transmission combined test device. It can be seen from the figure that the arc wind tunnel thermal-infrared transmission combined test device includes an arc heater 1, a nozzle 2, an optical side window head cover 3, and a target generator. 4. Observation window 5, light tube 6, infrared thermal imager 7, ground cooling air source 8 and vacuum test chamber 9; among them, arc heater 1 is placed horizontally, and the axial inlet end of nozzle 2 is docked with arc heater 1 The axial outlet end of the nozzle 2 extends into the interior of the vacuum test chamber 9; the optical side window head cover 3 is arranged at the outlet end position of the nozzle 2; the observation window 5 is arranged on the side wall of the vacuum test chamber 9; The position of the optical side window head cover 3 is corresponding; the target generator 4 is arranged on the outside of the vacuum test chamber 9, and the target generator 4 is placed corresponding to the observation window 5; the infrared thermal imager 7 is correspondingly placed outside the vacuum test chamber 9, and It is placed opposite the target generator 4; the light-passing tube 6 is arranged between the infrared thermal imager 7 and the optical side window head cover 3; the ground cooling air source 8 is arranged outside the vacuum test chamber 9, so as to realize the optical side window head cover 3 of cooling.

The arc heater 1 adopts one of a high-enthalpy laminated arc heater, a medium-enthalpy segmented arc heater, or a low-enthalpy AC arc heater. In order to reduce the copper particles produced during the arc heater 1 test.

Nozzle 2 is a supersonic profile nozzle. In addition, the inner wall of the nozzle is an axisymmetric profile, which ensures that the outlet air flow is close to parallel flow, and the uniform flow field is large.

The target generator 4 is an infrared target generator, which realizes the test target of generating infrared broadband.

The optical side window head cover 3 is a hollow cone structure; the cone top of the optical side window head cover 3 points to the outlet of the nozzle 2 in the axial direction;

An infrared window 31 is provided on the side wall of the optical side window head cover 3 close to the axis of the nozzle 2; the side wall of the optical side window head cover 3 opposite to the infrared window 31 is correspondingly provided with a through hole 32; the optical side window head cover 3 adopts Stainless steel material; infrared window 31 and observation window 5 are made of zinc sulfide material.

The center of the infrared window 31 is located on the axis of the nozzle 2; and the horizontal distance between the center of the infrared window 31 and the exit of the nozzle 2 is 150-300 mm; the through hole 32 is communicated with the axial end of the light-transmitting cylinder 6; , the observation window 5 , the infrared window 31 , the through hole 32 , the light-passing tube 6 and the infrared thermal imager 7 are placed in sequence along the axial direction of the light-passing tube 6 .

The infrared thermal imager 7 adopts a medium-wave thermal imager or a long-wave thermal imager; the wavelength of the medium-wave thermal imager is 4-5 μm; the wavelength of the long-wave thermal imager is 10-12 μm.

The light-passing tube 6 is a hollow cylindrical structure; the light-passing tube 6 is a three-layer structure, and the middle layer is made of stainless steel; the inner side wall is coated with black paint; the outer wall is made of ceramic tile heat-proof material. Make sure that the temperature in the light-transmitting tube does not occur violently as mentioned above during the test.

The ground refrigeration gas source 8 outputs nitrogen to cool the inner wall of the infrared window 31; continuously provides a certain flow of gas to the optical side window hood 3, and performs film cooling on the inner wall of the zinc sulfide side window on one side of the optical side window hood 3; The output nitrogen speed of the ground refrigeration gas source 8 is 10-200g/s.

work process:

The arc heater 1 heats the test medium, and generates a high-temperature airflow through the nozzle 2 to expand and accelerate to establish a ground simulated aircraft re-entry thermal environment. At the same time, the target generator 4 generates a test target, the radiation of the above-mentioned test target enters the test chamber through the observation window 5, and passes through the optical side window head cover 3, and the transmitted light of the above-mentioned test target is transmitted from the other side window of the optical side window head cover 3. The infrared thermal imager 7 continuously collects and records the test target images of the target generator 4 before the test, during the test and after the test, so as to complete the infrared transmission effect under pneumatic heating. acquisition of data. During the whole test process, the side windows of the heating surface of the optical side window head cover 3 are air-cooled through the ground cooling air source 8 .

The content not described in detail in the specification of the present utility model belongs to the well-known technology of those skilled in the art.

Claims (10)

1. Electric arc wind tunnel heat-infrared transmission combined test device which characterized in that: the device comprises an electric arc heater (1), a spray pipe (2), an optical side window hood (3), a target generator (4), an observation window (5), a light-transmitting cylinder (6), a thermal infrared imager (7), a ground refrigeration air source (8) and a vacuum test chamber (9); wherein the arc heater (1) is horizontally arranged, and the axial inlet end of the spray pipe (2) is butted with the arc heater (1); the axial outlet end of the spray pipe (2) extends into the vacuum test chamber (9); the optical side window hood (3) is arranged at the position of the outlet end of the spray pipe (2); the observation window (5) is arranged on the side wall of the vacuum test chamber (9); the observation window (5) corresponds to the optical side window hood (3) in position; the target generator (4) is arranged on the outer side of the vacuum test chamber (9), and the target generator (4) is arranged corresponding to the observation window (5); the thermal infrared imager (7) is correspondingly arranged outside the vacuum test chamber (9) and is opposite to the target generator (4); the light-transmitting cylinder (6) is arranged between the thermal infrared imager (7) and the optical side window head cover (3); the ground refrigeration air source (8) is arranged on the outer side of the vacuum test chamber (9) to realize cooling of the optical side window hood (3).

2. The electric arc wind tunnel heat-infrared transmission combined test device according to claim 1, characterized in that: the electric arc heater (1) adopts one of a high-enthalpy laminated electric arc heater or a medium-enthalpy segmented electric arc heater or a low-enthalpy alternating current electric arc heater.

3. The electric arc wind tunnel heat-infrared transmission combined test device according to claim 2, characterized in that: the spray pipe (2) is a supersonic molded surface spray pipe.

4. The electric arc wind tunnel heat-infrared transmission combined test device according to claim 3, characterized in that: the target generator (4) is an infrared target generator and is used for generating an infrared band test target.

5. The electric arc wind tunnel heat-infrared transmission combined test device according to claim 4, characterized in that: the optical side window hood (3) is of a hollow cone structure; the cone top of the optical side window head cover (3) points to the outlet of the spray pipe (2) along the axial direction; and the optical side window hood (3) is arranged along the axial offset spray pipe (2).

6. The electric arc wind tunnel heat-infrared transmission combined test device according to claim 5, characterized in that: an infrared window (31) is arranged on the side wall of the optical side window hood (3) close to the axis of the spray pipe (2); the optical side window head cover (3) is correspondingly provided with a through hole (32) at the side wall opposite to the infrared window (31).

7. The electric arc wind tunnel heat-infrared transmission combined test device according to claim 6, characterized in that: the center of the infrared window (31) is positioned on the axis of the spray pipe (2); and the horizontal distance between the center of the infrared window (31) and the outlet of the spray pipe (2) is 150-300 mm; the through hole (32) is communicated with one axial end of the light-transmitting cylinder (6); the target generator (4), the observation window (5), the infrared window (31), the through hole (32), the light-transmitting cylinder (6) and the thermal infrared imager (7) are sequentially and correspondingly arranged along the axial direction of the light-transmitting cylinder (6).

8. The electric arc wind tunnel heat-infrared transmission combined test device according to claim 7, characterized in that: the thermal infrared imager (7) adopts a medium wave thermal imager or a long wave thermal imager; the wavelength of the medium wave thermal imager is 4-5 μm; the wavelength of the long-wave thermal imager is 10-12 mu m.

9. The electric arc wind tunnel heat-infrared transmission combined test device according to claim 8, characterized in that: the light-transmitting cylinder (6) is of a hollow cylindrical structure; the light-transmitting cylinder (6) is of a three-layer structure, and the middle layer is made of stainless steel; coating black paint on the inner side wall; the outer side wall is a ceramic tile.

10. The electric arc wind tunnel heat-infrared transmission combined test device of claim 9, characterized in that: the ground refrigeration air source (8) outputs nitrogen to realize the cooling of the inner wall of the infrared window (31); the nitrogen output speed of the ground refrigeration air source (8) is 10-200 g/s.