Supersonic heat exchanger use method and engine multi-state air inlet simulation test method

Abstract

Disclosed is a supersonic heat exchanger use method. The supersonic heat exchanger comprises a temperature simulation unit in communication with a pipeline and a supersonic nozzle; the method comprises the following steps of: S1, supplying a first medium to a first medium channel with a highest working condition value borne by a temperature simulation unit, and supplying a second medium to a second medium channel according to a test predetermined value; S2, keeping the state of the step S1 until the temperature simulation unit enters a stable working state; S3, determining the supply temperature of the first medium according to the test predetermined value; S4, adjusting the first medium supply state according to the highest working condition value supplied by the temperature simulation unit to be supplied according to a test predetermined value; S5, keeping the first medium and the second medium supply state to the temperature simulation unit according to an experiment preset value toenter a stable working state; and S6, after the supersonic nozzle is operated stably, completing the debugging of the supersonic heat exchanger, and the supersonic heat exchanger enters a stable state of test work.

Description

technical field [0001] The invention relates to the technical field of test and measurement, in particular to a method for using a supersonic heat exchanger and an engine multi-state air intake simulation test method. Background technique [0002] Heat exchangers, also known as heat exchangers, are equipment for exchanging heat between hot and cold fluids. In chemical, petroleum, power, food and other sectors, heat exchangers are widely used as heaters, coolers and condensers. For the engine test bench, the heat exchanger is also a key component. It is used to heat the intake air of the engine simulation experiment. Its performance parameters and / or a test to enter the next state point after evaluating 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...

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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; at the same time, when the existing heat exchanger is used to heat the intake air of the engine simulation experiment, there is no accurate method to determine whether the heat exchanger enters Stable working state, that is, it is impossible to accurately determine whether the temperature of the intake air of the heated engine has entered a stable state. The only way to ensure that the heat exchanger enters a stable working state is to greatly increase the operating time of the heat exchanger at a state point, resulting in a test time The test cost is greatly increased, and the energy waste is also caused. In addition, when the heat exchanger is used to heat the intake air of the engine simulation experiment, there is no accurate method to determine the heat flow input temperature of the heat exchanger. The method of replacing the input temperature of the heat flow of the heat exchanger at a time ensures that the output temperature of the cold flow of the heat exchanger reaches the predetermined value, which also leads to a substantial increase in the test time and cost of the test, and also causes a waste of energy

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