Simulation hammer wave generation and test system

Abstract

A simulation hammer wave generation and test system includes a three-way device, a pressure diaphragm, a pipeline, a valve, a high pressure cavity, a flow meter, a dynamic data acquisition system and a hammer wave generation control system. The three-way device is connected at an outlet of a test piece. A first outlet of the three-way device is connected with the pressure diaphragm. A second outlet of the three-way device is connected with the flow meter. The pressure diaphragm is connected with the high pressure cavity through the pipeline. The hammer wave generation control system is in electric signal connection with the valve. The pressure diaphragm is in a closed state, an air flow enters the flow meter through the three-way device, the dynamic acquisition system acquires a pipe pressure value of the test piece, the hammer wave generation control system opens the valve when a hammer wave is generated, in a moment a pressure wave moving upstream is generated to simulate the hammer wave, and afterwards, the hammer wave generation control system makes a signal response to a wind tunnel control system to end the test. The system has a simple structure and ensures the simulation of the hammering wave when the test piece is in the required flow.

Description

technical field [0001] The invention belongs to the technical field of aviation aerodynamics, and in particular relates to a simulated hammer wave generation and test system. Background technique [0002] The hammer shock load is mainly closely related to the parameters such as the bypass ratio of the engine and the total boost ratio. It is related to whether the air intake of a fighter jet can withstand the dynamic load impact generated by the engine surge, that is, whether it can ensure that the aircraft can fly safely even in the engine surge state. For immature engines, especially newly developed engines, the surge problem is unavoidable, so the aircraft department needs to consider the hammer shock load caused by engine surge at the beginning of the inlet design. In the late 1960s, foreign countries encountered the hammer shock load problem. During the flight test of the aircraft, the main load-bearing structural components were damaged due to engine surge. The air inl...

AI Technical Summary

Problems solved by technology

[0005] The invention makes reasonable use of the wind tunnel and its control system, can complete the performance test of the hammer wave load of the inlet, and solves the problem of simulating the occurrence of the hammer wave of the inlet; hammer wave

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