A method of using a supersonic engine test bench

Abstract

The invention relates to an application method of a supersonic engine test stand, which comprises the steps of S100), adjusting the pressure of a simulation chamber; S200), adjusting the intake air total pressure and oxygen content of an engine; S300), adjusting the intake air total temperature of the engine; S400), adjusting the intake air total pressure of the engine; S500), igniting the engine;S600), conducting a simulation test of an Nth simulated state point; and S700), repeating the step S600 until all simulated state points are completely tested, turning off the engine, closing an engine fuel supply flow regulating valve, an oxygen supply flow regulating valve, an engine intake air supply pressure regulating valve and an alcohol supply flow regulating valve, and then closing an ejector active air flow supply pressure regulating valve. The application method of the supersonic engine test stand realizes a ground simulation test of the supersonic engine, is high in regulating speed, saves the regulating time of engine air intake simulation and flight attitude environment pressure simulation of the test stand, reduces the test cost and avoids the waste of energy.

Description

technical field [0001] The invention relates to the technical field of test and measurement, in particular to a method for using a supersonic engine test bench. Background technique [0002] Before the test flight of the aero-engine, a high-altitude simulation test needs to be done on the ground. During the engine test, a set of parameters are required, including the total intake pressure, the intake air flow rate, the intake oxygen content, the total intake temperature, and the amount of fuel supplied to the engine. , the air environment pressure is called the state point, and when it reaches the set value and stabilizes at the same time, record its performance and parameters or evaluate its performance. With the maturity of the engine, the application of the supersonic engine is becoming more and more extensive. On this basis, the engine intake system needs to simulate the supersonic speed of the supersonic engine when it is used for the supersonic engine of the aircraft, ...

AI Technical Summary

Problems solved by technology

With the maturity of the engine, the application of the supersonic engine is becoming more and more extensive. On this basis, the engine intake system needs to simulate the supersonic speed of the supersonic engine when it is used for the supersonic engine of the aircraft, especially the unmanned aerial vehicle, and the ground test of the engine. Intake state, the existing engine test bench technology, there is no mature technology for supersonic engine intake simulation, and there is no accurate theoretical method for determining when the simulation state reaches a stable state, resulting in poor test simulation effect and long test period. High cost and serious waste of resources

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