CN106802167B - A dynamic temperature-pressure combined probe for measuring supersonic three-dimensional unsteady flow field - Google Patents
A dynamic temperature-pressure combined probe for measuring supersonic three-dimensional unsteady flow field Download PDFInfo
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- CN106802167B CN106802167B CN201710132909.6A CN201710132909A CN106802167B CN 106802167 B CN106802167 B CN 106802167B CN 201710132909 A CN201710132909 A CN 201710132909A CN 106802167 B CN106802167 B CN 106802167B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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Abstract
The invention belongs to the technical field of temperature and pressure testing, and discloses a dynamic temperature and pressure combined probe for measuring a supersonic three-dimensional unsteady flow field, which comprises a probe head and a support rod, wherein the probe head is of a wedge tip split column structure, 4 dynamic pressure sensors are packaged in the probe head, 1 dynamic temperature sensor is installed in the probe head, the windward side of the probe head comprises a wedge top inclined plane, a left side surface and a right side surface during measurement, the leeward side is a cylindrical surface, the head of each dynamic temperature sensor is exposed out of the wedge top inclined plane, 4 pressure sensing holes are formed in the windward side and are respectively communicated with the 4 dynamic pressure sensors, and cables of the 5 sensors are led out of the tail of the probe through an inner channel of the support rod. Compared with the existing pressure probe, the ultrasonic three-dimensional unsteady flow field parameter measuring device can measure the change of ultrasonic incoming flow temperature, total pressure, static pressure, deflection angle, pitch angle, Mach number and three-dimensional speed along with time at the same time through calibration of the wind tunnel, and provides a means for efficiently, accurately and comprehensively measuring ultrasonic three-dimensional unsteady flow field parameters for a turbine experiment.
Description
Technical Field
The invention belongs to the technical field of temperature and pressure tests, relates to a dynamic temperature and dynamic pressure measuring device of a supersonic three-dimensional unsteady flow field, and particularly relates to a dynamic temperature and pressure combined probe for measuring the supersonic three-dimensional unsteady flow field, which is suitable for testing supersonic three-dimensional dynamic flow fields at an inlet, an outlet and an interstage of an impeller machine.
Background
The dynamic temperature and dynamic pressure combined distortion of an inlet flow field can seriously affect the pneumatic performance of the supersonic compressor, even cause supersonic stall and surge, research the influence mechanism of the dynamic temperature and dynamic pressure combined distortion, and urgently need to measure the supersonic three-dimensional dynamic flow field of the inlet, the interstage and the rotor outlet of the supersonic compressor with the dynamic temperature and dynamic pressure combined distortion. At present, a dynamic pressure sensor can only be used for measuring dynamic pressure signals, a small inertia thermocouple is used for measuring dynamic temperature signals, a conventional steady-state pressure probe is used for measuring total pressure distribution, more three-dimensional unsteady flow field information cannot be provided, and a more targeted measuring means is urgently needed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the problem that the dynamic temperature and dynamic pressure combined distortion affects the insufficient measurement means in the research of the mechanism of the aerodynamic performance of the supersonic compressor, the invention provides the combined probe for measuring the dynamic temperature and the dynamic pressure of the supersonic three-dimensional flow field.
The technical solution of the invention is as follows:
1. a dynamic temperature and pressure combined probe for measuring a supersonic three-dimensional unsteady flow field is characterized in that: the probe comprises a probe head (1) and a support rod (2), wherein the probe head (1) is of a wedge top split columnar structure, the windward side of the probe head (1) comprises a wedge top inclined plane (3), a symmetrical left side surface (4) and a right side surface (5) during measurement, the leeward side is a rear cylindrical surface (6), 4 dynamic pressure sensors are packaged in the leeward side, 1 dynamic temperature sensor is installed, and the temperature sensor head (7) is exposed out of the wedge top inclined plane (3); a pressure sensing hole is formed in a wedge top inclined plane (3) of a probe head (1) and is an upper hole (8), 1 pressure sensing hole is formed in each of a left side face (4), a right side face (5) and a wedge front edge where the left side face and the right side face border and the wedge front edge where the left side face and the right side face border and the wedge front edge where the right side face and the wedge front edge border are located, the pressure sensing holes are respectively a left hole (9), a right hole (10) and a middle hole (11), and the 4 pressure sensing holes which are not communicated with each other are respectively communicated with 4 dynamic pressure sensors in the probe.
2. Furthermore, the probe supporting rod (2) is of a columnar structure, can be a cylinder or a triangular prism, and is internally provided with a circular channel.
3. Furthermore, the included angle of the left side surface (4) and the right side surface (5) of the probe head (1) is 26-78 degrees.
4. Furthermore, the included angle between the front edge line of the junction of the left side surface (4) and the right side surface (5) of the probe head (1) and the wedge top inclined plane is 32-56 degrees.
5. Furthermore, the dynamic temperature sensor is arranged at the back of the wedge top wedge of the probe head (1), and the head (7) of the temperature sensor is exposed out of the wedge top inclined plane (3) by 0.5 mm to 3 mm.
6. Furthermore, an upper hole (8) on the wedge top inclined plane of the probe head (1) is arranged at the front lower part of the temperature sensor head (7), and the distance between the circle center of the upper hole (8) and the lowest point of the wedge top inclined plane (3) is 1 mm-5 mm.
7. Furthermore, the central line of the head part (7) of the temperature sensor of the probe head part (1), the central line of the upper hole (8), the central line of the middle hole (11), the front edge line of the junction of the left side surface (4) and the right side surface (5) are on the same plane, the left side surface (4) and the right side surface (5) are symmetrical along the plane, and the left hole (9) and the right hole (10) are symmetrically distributed along the plane.
8. Furthermore, the distance between the center of the hole (11) in the probe head (1) and the lowest point of the wedge top inclined plane (3) is 1 mm to 3 mm.
9. Further, the diameters of the upper hole (8), the left hole (9), the right hole (10) and the middle hole (11) are 0.6 mm to 1.5 mm.
10. Furthermore, cables (12) of the dynamic temperature sensor and the dynamic pressure sensor are led out from the tail of the probe through a channel in the probe supporting rod (2).
The invention has the beneficial effects that:
compared with the existing pressure probe, the ultrasonic three-dimensional unsteady flow field parameter measuring device can measure the change of ultrasonic incoming flow temperature, total pressure, static pressure, deflection angle, pitch angle, Mach number and three-dimensional speed along with time at the same time through calibration of the wind tunnel, and provides a means for efficiently, accurately and comprehensively measuring ultrasonic three-dimensional unsteady flow field parameters for a turbine experiment.
Drawings
FIG. 1 is a schematic diagram of a dynamic temperature and pressure combination probe for measuring supersonic three-dimensional unsteady flow fields in an embodiment of the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a view from direction a of fig. 2.
Wherein: 1-probe head, 2-probe support rod, 3-wedge top inclined plane, 4-left side, 5-right side, 6-rear cylindrical surface, 7-temperature sensor head, 8-upper hole, 9-left hole, 10-right hole, 11-middle hole and 12-cable.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in fig. 1, the embodiment introduces a dynamic temperature and pressure combined probe for measuring a supersonic three-dimensional unsteady flow field, which comprises a probe head (1) and a support rod (2), wherein the probe head (1) is of a wedge-top split-column structure, the diameter of an external circle is 6 mm, the height of the probe head (1) is 30 mm, the windward side of the probe head (1) during measurement comprises a wedge top inclined plane (3), a symmetrical left side surface (4) and a right side surface (5), the leeward side is a rear cylindrical surface (6), 4 dynamic pressure sensors are packaged in the rear cylindrical surface, 1 dynamic temperature sensor is installed in the rear cylindrical surface, and the temperature sensor head (7) is exposed out of the wedge top inclined plane (3); a pressure sensing hole is formed in a wedge top inclined plane (3) of a probe head (1) and is an upper hole (8), 1 pressure sensing hole is formed in each of a left side face (4), a right side face (5) and a wedge front edge where the left side face and the right side face border and the wedge front edge where the left side face and the right side face border and the wedge front edge where the right side face and the wedge front edge border are located, the pressure sensing holes are respectively a left hole (9), a right hole (10) and a middle hole (11), and the 4 pressure sensing holes which are not communicated with each other are respectively communicated with 4 dynamic pressure sensors in the probe.
The probe supporting rod (2) is a cylinder, the diameter of the probe supporting rod is 8 mm, a circular channel is formed in the probe supporting rod, the diameter of the circular channel is 5 mm, and cables (12) of the dynamic temperature sensor and the dynamic pressure sensor are led out from the tail of the probe through the channel in the probe supporting rod (2).
The included angle of the left side surface (4) and the right side surface (5) of the probe head (1) is 30 degrees.
The front edge line of the junction of the left side surface (4) and the right side surface (5) of the probe head (1) forms an included angle of 40 degrees with the wedge top inclined plane.
The dynamic temperature sensor is arranged at the inner rear part of the wedge top wedge of the probe head part (1), and the head part (7) of the temperature sensor is exposed out of the wedge top inclined plane (3) by 1 mm.
An upper hole (8) on the wedge top inclined plane of the probe head (1) is arranged at the front lower part of the temperature sensor head (7), and the distance between the circle center of the upper hole (8) and the lowest point of the wedge top inclined plane (3) is 1 mm.
The central line of the head part (7) of the temperature sensor of the probe head part (1), the central line of the upper hole (8), the central line of the middle hole (11), and the front edge line of the junction of the left side surface (4) and the right side surface (5) are on the same plane, the left side surface (4) and the right side surface (5) are symmetrical along the plane, and the left hole (9) and the right hole (10) are symmetrically distributed along the plane.
The distance between the center of a hole (11) in the probe head (1) and the lowest point of the wedge top inclined plane (3) is 1 mm.
The diameters of the upper hole (8), the left hole (9), the right hole (10) and the middle hole (11) are 0.6 mm.
The circle centers of the left hole (9), the right hole (10) and the middle hole (11) are on the same plane, the distance between the circle center of the left hole (9) and a front edge line of a junction of the left side face (4) and the right side face (5) is 3 millimeters, and the distance between the circle center of the right hole (10) and the front edge line of a junction of the left side face (4) and the right side face (5) is 3 millimeters.
The dynamic temperature and pressure combined probe for measuring the ultrasonic three-dimensional unsteady flow field disclosed in the embodiment of the invention can obtain calibration data through supersonic calibration wind tunnel calibration. When the supersonic three-dimensional unsteady flow field is actually measured, the unsteady pressure and unsteady temperature data sensed by the 4 dynamic pressure sensors and the 1 dynamic temperature sensor of the dynamic temperature and pressure combined probe are measured simultaneously, and the obtained supersonic calibration wind tunnel calibration data is utilized to carry out data processing, so that the change of supersonic incoming flow temperature, total pressure, static pressure, deflection angle, pitch angle, Mach number and three-dimensional speed along with time can be obtained.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710132909.6A CN106802167B (en) | 2017-03-08 | 2017-03-08 | A dynamic temperature-pressure combined probe for measuring supersonic three-dimensional unsteady flow field |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710132909.6A CN106802167B (en) | 2017-03-08 | 2017-03-08 | A dynamic temperature-pressure combined probe for measuring supersonic three-dimensional unsteady flow field |
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| CN106802167B true CN106802167B (en) | 2020-04-28 |
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| CN115752886A (en) * | 2022-10-29 | 2023-03-07 | 上海理工大学 | Cylindrical four-hole pressure probe for measuring unsteady three-dimensional flow field |
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| EP0702524A4 (en) * | 1993-03-05 | 1998-12-30 | Armen N Sahagen | Probe for monitoring a fluid medium |
| DE4337402A1 (en) * | 1993-10-26 | 1995-04-27 | Mannesmann Ag | Probe for measuring pressure and temperature profiles |
| CN104048808B (en) * | 2013-03-14 | 2016-04-20 | 中国科学院工程热物理研究所 | A kind of kolmogorov sinai entropy probe |
| CN103884467B (en) * | 2014-04-14 | 2016-05-11 | 中国科学院工程热物理研究所 | Plasma pressure probe and utilize the system of its gaging pressure |
| CN106404409B (en) * | 2016-11-16 | 2018-12-07 | 中国科学院工程热物理研究所 | A kind of probe assembly of suitable aero-engine Strong shear nonstationary flow test |
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