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Pneumatic probe steady flow field continuous test method based on pre-dynamic calibration

A technology of dynamic calibration and steady flow field, applied in aerodynamic test, machine/structural component test, measuring device, etc., can solve the problem of increasing test measurement time and so on

Active Publication Date: 2022-02-15
中国空气动力研究与发展中心空天技术研究所
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Problems solved by technology

However, this measurement method will greatly increase the test measurement time when the measurement requires a large number of space measurement points or the pressure of the pressure measurement pipeline has a long stabilization time.

Method used

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  • Pneumatic probe steady flow field continuous test method based on pre-dynamic calibration
  • Pneumatic probe steady flow field continuous test method based on pre-dynamic calibration
  • Pneumatic probe steady flow field continuous test method based on pre-dynamic calibration

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Embodiment 1

[0052] The continuous testing method of the steady flow field of the pneumatic probe based on the pre-dynamic calibration of the present invention comprises the following steps:

[0053] S10. Perform a dynamic calibration test to obtain the pressure dynamic transfer characteristics of the probe pipeline;

[0054] S11. Install a pneumatic probe pipeline pressure dynamic calibration device;

[0055] like figure 1 As shown, the dynamic calibration device includes a balloon 1, a mount 2, a pneumatic probe 3, a pressure measuring pipeline 4, a pressure sensor I5, a pressure sensor II6 and a pressure acquisition and testing system 7;

[0056] The pneumatic probe 3 and the pressure sensor I5 are installed on the mounting base 2, the balloon 1 is set on the mounting base 2, the measuring hole of the pneumatic probe 3 and the sensing part of the pressure sensor I5 are placed inside the balloon 1; the pressure measuring pipeline The front end of 4 is connected to the tail end of the p...

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Abstract

The invention discloses a pneumatic probe steady flow field continuous test method based on pre-dynamic calibration. The continuous test method comprises the following steps of firstly, utilizing a pressure step excitation signal generated by a pressure signal generation device and an output response signal of a probe pipeline to the excitation signal, and obtaining a dynamic transmission characteristic of a probe pipeline system to a pressure signal through a system identification method; and then, in an actual flow field test, data measured by a pressure sensor at the tail end of a pneumatic probe pipeline being corrected by utilizing the dynamic transfer characteristic parameters so that real pressure change sensed at the hole measuring position through continuous movement of the pneumatic probe is obtained. The continuous test method is suitable for a test environment in which the test pressure level is close to the atmospheric pressure, test efficiency of the flow field aerodynamic parameters of the pneumatic probe can be remarkably improved, and test cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of pneumatic testing, and in particular relates to a continuous testing method for a steady flow field of a pneumatic probe based on dynamic calibration in advance. Background technique [0002] The standard pneumatic probe measurement system consists of a pneumatic probe, a pressure measuring hose and a pressure sensor (pressure scanning valve), etc., and is generally used for the measurement of aerodynamic parameters in a steady state flow field. Since the lumen effect formed by the pneumatic probe and the pressure measuring hose will cause the hysteresis of the changing pressure signal measured by the pressure sensor connected to the end of the pressure measuring hose, when using the pneumatic probe to measure the flow field parameters in different spatial positions , the discrete point measurement method is usually used, that is, after the pneumatic probe reaches the measurement point, it needs to wait f...

Claims

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Application Information

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IPC IPC(8): G01M9/06G01L11/00G01L27/00
CPCG01M9/06G01L11/00G01L27/002
Inventor 陈峰王素洁江辉谭锡容李聪岳少原
Owner 中国空气动力研究与发展中心空天技术研究所
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