Ethylene supply device and flow measuring method thereof

Abstract

The invention discloses an ethylene supply device and a flow measuring method thereof. An ethylene gas cylinder is connected with a piston cylinder through a pipeline, the piston cylinder is connected with a test model through a pipeline, a compensation gas source is connected with the piston cylinder through a pipeline, wherein the ethylene gas cylinder is used for filling an ethylene gas into the piston cylinder, and connected to the test model through the pipeline; the compensation gas source is used for compensating compensation gas with stable pressure into the piston cylinder, wherein the compensation gas pushes a piston with stable pressure, so that the piston extrudes the ethylene gas with stable pressure to realize stable and quick supply of the ethylene. Meanwhile, the ethylene supply device precisely controls pressure of the ethylene gas which enters the piston cylinder through a solenoid valve, so that the working pressure is lower than a liquidation pressure point at a local temperature all the time, an ethylene phase change problem in a working process is avoided, the mass of the ethylene gas fed into a fuel cylinder is obtained by measuring the pressure and the volume of the ethylene gas in the piston cylinder, and the flow of the ethylene is accurately calculated and obtained by measuring ethylene outflow time.

Description

technical field [0001] The invention relates to the field of aerospace ethylene fuel engines, in particular to an ethylene supply device and a flow measurement method thereof. Background technique [0002] At present, great progress has been made in the development and test flight of hypersonic vehicles. However, the cost of flight tests is relatively high, and ground tests are the main means of engine design and performance evaluation. Often, the acquisition of accurate parameters from ground tests plays a significant role in the design of the engine and the prediction of the problems that may be encountered in the actual flight of the engine; The most commonly used engine fuels are hydrogen, ethylene, and kerosene. The fuel equivalent oil-air ratio is an important parameter for engine operation, and the accuracy of the equivalent oil-air ratio measurement has a great impact on engine performance evaluation. Hydrogen flow can be measured by gas volume flowmeter and pressu...

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Problems solved by technology

[0004] In order to overcome the problem that ethylene is prone to phase change under test conditions, resulting in gas-liquid coexistence and resulting in unstable oil supply flow, this invention proposes an ethylene supply device and its flow measurement method; the piston is pushed by the compensation gas, and the piston squeezes the ethylene Gas, the precise control of the solenoid valve realizes the supply of ethylene; during use, the supply temperature and pressure of ethylene are strictly controlled to ensure that it is always in the gaseous state during use, and accurate flow measurement is realized

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