A method of using an engine test bench

Abstract

The invention relates to an application method of an 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 pressure of the engine; S400), adjusting the intake air total pressure of the engine; S500), igniting the engine; S600), conducting a simulation test on 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 engine test stand 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 an 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. After reaching the set value and being stable at the same time, record its performance and parameters or evaluate its performance. The existing engine test bench technology is not yet mature for engine intake simulation and flight environment pressure simulation. At the same time, there is no accurate theoretical method for judging when the simulation state reaches a stable state, resulting in poor test simulation ...

AI Technical Summary

Problems solved by technology

[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. After reaching the set value and being stable at the same time, record its performance and parameters or evaluate its performance. The existing engine test bench technology is not yet mature for engine intake simulation and flight environment pressure simulation. At the same time, there is no accurate theoretical method for judging when the simulation state reaches a stable state, resulting in poor test simulation effect, long test period, high cost, and serious waste of resources

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