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A wind tunnel test method for automatic control of throttling characteristics of a ramjet intake port

A technology of automatic control and ramjet, applied in aerodynamic tests, machine/structural component testing, instruments, etc., can solve problems such as insufficient research capabilities, improve test efficiency, avoid resource waste, and avoid uncertain factors Effect

Active Publication Date: 2020-09-18
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Facing the urgent needs of the development of the current air intake technology, the current research capabilities of the air intake wind tunnel test technology are insufficient. Due to the uncertainty of manual point selection during the test process, it is difficult to provide refined technical support for the development of the model. , the automatic coupling adjustment technology of the back pressure adjustment system and the data acquisition system highlights the necessity

Method used

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  • A wind tunnel test method for automatic control of throttling characteristics of a ramjet intake port
  • A wind tunnel test method for automatic control of throttling characteristics of a ramjet intake port
  • A wind tunnel test method for automatic control of throttling characteristics of a ramjet intake port

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Embodiment

[0033] A wind tunnel test method for automatic control of throttle characteristics of a ramjet intake port, comprising the following steps:

[0034] (1) if figure 2 As shown, first in the design stage of the ramjet inlet test model, according to the throttle characteristics of the tested inlet, determine the number of static pressure monitoring points along the way and the design positions of the side walls of the inlet respectively. Design and process according to the conventional inlet model. The measurement sensors at monitoring points should have the characteristics of high precision and fast response, and the acquisition system should have real-time storage and transmission functions. Other pressure measurement and acquisition systems can choose the conventional air inlet pressure measurement system. The back pressure adjustment system can be selected from the conventional intake port throttling cone adjustment system. The static pressure monitoring point is connected...

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Abstract

The invention discloses a ramjet air inlet throttle characteristic automatic control wind tunnel test method. A row of static pressure monitoring points are distributed along key positions of an air inlet wind tunnel test model, and the monitoring points are measured and fed back in real time by adopting a high-precision quick response pressure measuring sensor and a collecting system. According to the non-forward transmission characteristic of supersonic flow, the position of an ending shock wave can be judged through the feedback value of the static pressure monitoring points, a control instruction is sent to a back pressure regulating system to increase or decrease the back pressure so as to achieve the expected flow state of an air inlet duct, and then a collecting instruction is sentto carry out pressure data collection at all the monitoring points. The automatic closed-loop control over the back pressure regulating system and the data acquisition system is realized, so that an ideal throttling characteristic curve can be obtained under the test state by one time blowing.

Description

technical field [0001] The invention relates to an automatic control wind tunnel test method. Background technique [0002] The air intake is a key part of the air-breathing aircraft, and its performance directly affects the overall performance of the engine and even the aircraft. The wind tunnel test of the inlet is the main means to evaluate the performance of the inlet and obtain the characteristic parameters of the inlet. Among them, the flow coefficient and the total pressure recovery coefficient are the two most important characteristic parameters of the inlet. The main purpose of the wind tunnel test is also In order to obtain the complete law of the change of the two with the outlet back pressure of the inlet port, to evaluate the working performance of the inlet port under different working conditions. [0003] At present, the simulation of the outlet back pressure of the inlet test is in the form of a throttling cone. The commonly used method is to manually set se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/00
CPCG01M9/00
Inventor 周健秦永明欧平吴军飞宋法振
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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