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Full-parameter probe for measuring high-subsonic three-dimensional steady-state flow field

A steady-state flow field and full-parameter technology, which is applied in the field of full-parameter probes, can solve the problems of fragile temperature sensors, insufficient flow field measurement, and low spatial resolution, so as to achieve stable temperature recovery coefficient, improve service life, and increase temperature. The effect of high recovery coefficient

Pending Publication Date: 2020-05-12
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of low spatial resolution, insufficient flow field measurement, large measurement error, low measurement accuracy and easy damage of temperature sensor in the measurement of high subsonic three-dimensional steady-state flow field by existing probes, a method for simultaneously measuring high sub-sonic three-dimensional steady-state flow field is proposed. Full parameter probe of total temperature, static temperature, total pressure, static pressure, deflection angle, pitch angle, Mach number, density and velocity of state flow field

Method used

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  • Full-parameter probe for measuring high-subsonic three-dimensional steady-state flow field
  • Full-parameter probe for measuring high-subsonic three-dimensional steady-state flow field
  • Full-parameter probe for measuring high-subsonic three-dimensional steady-state flow field

Examples

Experimental program
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Effect test

Embodiment example 1

[0038] For the inlet of a high subsonic compressor, the incoming flow velocity is high and the three-dimensionality of the flow field is relatively weak, so the probe head (1) can choose a larger diameter to ensure strength and rigidity; the temperature sensor can choose a stronger armor Thermocouple; the diameter of the pressure sensing hole (5, 6, 7, 8) can be selected to be larger, and the angle between the pressure sensing left hole (5) and the pressure sensing right hole (7) can be selected to be larger, so the following can be used Described implementation mode:

[0039] Figure 1 to Figure 6 It is a structural schematic diagram of a full-parameter probe for measuring high-subsonic three-dimensional steady-state flow field of the present invention, Figure 7 It is a schematic diagram of the probe of the present invention applied to the inlet of a high subsonic compressor. The present invention consists of a probe head (1), a probe pole (2), a cylinder (3), a blunt cone...

Embodiment example 2

[0068] For high subsonic compressor impeller stages, the flow field velocity is relatively small, but the measurement space is narrow, and the three-dimensionality of the flow field is relatively strong, so the probe head (1) can choose a smaller diameter to ensure spatial resolution and reduce Minor disturbance of the flow field to be measured; the temperature sensor can choose a bare wire thermocouple or temperature optical fiber sensor with a high response; the diameter of the pressure sensing hole (5, 6, 7, 8) can choose a smaller diameter, and the pressure sensing hole on the left (5) A smaller angle can be selected between the pressure sensing right hole (7), so the following implementations can be adopted:

[0069] Figure 8 to Figure 13 It is a structural schematic diagram of a full-parameter probe for measuring high-subsonic three-dimensional steady-state flow field of the present invention, Figure 14 It is a schematic diagram of the probe of the present invention u...

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Abstract

The invention belongs to the technical field of flow field testing, and discloses a full-parameter probe for measuring a high-subsonic three-dimensional steady-state flow field, which comprises a probe head, pressure sensing holes, a convective heat exchange hole, a temperature sensor, a heat insulation sealing piece, a pressure guide pipe, a temperature sensor cable, a temperature sensor cable lead-out channel, a pressure guide pipe lead-out channel and a probe support rod. Three pressure sensing holes are formed in the windward side of the cylinder of the probe head, one pressure sensing hole is formed in the windward side of a blunt cone, and the temperature sensor is placed in the convection heat exchange hole in the leeward side of the probe head so as to be protected against high-speed main flow impact. Compared with an existing probe, the probe can measure the total temperature, the static temperature, the total pressure, the static pressure, the deflection angle, the pitch angle, the mach number, the density and the three-dimensional speed of the high-subsonic three-dimensional steady-state flow field at the same time, is suitable for three-dimensional steady-state flow fields among inlets, outlets and impeller stages of high-subsonic air compressors, fans, compressors and the like, and can realize high-precision refined multi-parameter flow field measurement.

Description

technical field [0001] The invention belongs to the technical field of flow field testing, and in particular relates to a full-parameter probe for measuring high-subsonic three-dimensional steady-state flow fields, which is suitable for three-dimensional steady-state flow fields between inlets, outlets, and impeller stages of high-subsonic compressors, fans, compressors, etc. Measurement. Background technique [0002] For the three-dimensional flow field between the inlet, outlet and impeller stages of high subsonic compressors, fans, compressors, etc., due to the rotation of the rotor, the tip clearance, the staggered arrangement of the moving and stationary blade rows, the mixing of the main flow and the wake, and the secondary flow, etc. Interaction, resulting in flow field chaos, showing a very strong three-dimensionality, so it is very important for researchers to accurately measure the complex three-dimensional flow field parameters between the inlet, outlet and impell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/02G01D21/02
CPCG01D21/02G01M15/02
Inventor 马宏伟尉星航
Owner BEIHANG UNIV
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