Supersonic engine test stand

Abstract

The invention relates to a supersonic engine test stand, which comprises a supply source, a temperature simulation unit, a simulation chamber, a supersonic nozzle and an exhaust ejector, wherein the supply source includes a fuel supply source, an oxygen supply source, an engine intake air supply source, an alcohol supply source and an ejector active air flow supply source; the temperature simulation unit includes a pipe body and a shell, the pipe body is located inside the shell and internally provided with a first medium channel, and the space between the outer wall of the pipe body and the inner wall of the shell forms a second medium channel; a tested engine is located in the simulation chamber; and the supersonic nozzle includes an inlet equal-straightness section, a subsonic convergence section, an initial supersonic expansion section and a supersonic expansion section which are coaxially and fixedly connected in sequence. The supersonic engine test stand is provided with a Lavalsupersonic nozzle between the temperature simulation unit and an air inlet of the engine, and realizes the simulation for the air inlet state of a supersonic engine during a supersonic engine and engine ground test.

Description

technical field [0001] The invention relates to the technical field of test and measurement, in particular to 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, especially the unma...

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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