Flowmeter calibration system and method for cryogenic propellant rocket engine

Abstract

The invention relates to a low-temperature propellant rocket engine, in particular to a flowmeter calibration system and method for the low-temperature propellant rocket engine, and aims to solve the problems that when an existing low-temperature propellant rocket engine uses a flow meter for flow measurement, the measurement accuracy of the flowmeter is low, and only reference flow meter calibration in a short time period can be carried out. According to the technical scheme, the flowmeter calibration system of the low-temperature propellant rocket engine comprises a container filling unit, a container, a supply pipeline, a weighing unit, a rapid recovery container, a weighing filling recovery unit and a recovery unit which are sequentially connected; the container filling unit is used for connecting a tank car and a container; the supply pipeline comprises a temperature sensor, a pressure sensor, and a first isolation valve, a reference flowmeter, a calibration flow adjusting hand valve, a vertical main pipe and N horizontal pipes which are sequentially connected through a pipeline, wherein the horizontal pipes are evenly distributed on the circumference. The invention further provides a flowmeter calibration method of the low-temperature propellant rocket engine.

Description

technical field [0001] The invention relates to a low-temperature propellant rocket engine, in particular to a flowmeter calibration system and method for a low-temperature propellant rocket engine. Background technique [0002] For rocket engines using low-temperature propellants such as liquid oxygen, liquid hydrogen, and methane, accurate flow measurement is required when the gas-liquid mixture state of the engine pre-cooling discharge is used in the ground hot test run ignition test, and a turbine flowmeter is generally used for flow measurement. Measurement. The turbine flowmeter needs to be calibrated before use, because the flow calibration of the turbine flowmeter is generally performed in the calibration center, and can only be calibrated under the flow of water medium. Therefore, before applying the turbine flowmeter to the flow measurement of low-temperature medium, flow calibration under low-temperature medium flow is required. [0003] The conventional flow ca...

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Problems solved by technology

[0009] The present invention aims to solve the problem that when low-temperature propellant rocket engines use flowmeters for flow measurement, if low-temperature medium is directly used instead of water, the volume of the container will be quite different from the actual working volume, and it is very difficult to weigh the container, and it needs to be installed The calibration and measurement of the liquid level meter is cumbersome and has large errors, which further reduces the accuracy of the flowmeter measurement. When calibrating the reference flowmeter, the calibration method of the open discharge low-temperature medium can only be used for a short period of time. Calibration reduces the problem of the calculation accuracy of the average flow rate of the reference flowmeter, and provides a flowmeter calibration system and method for cryogenic propellant rocket engines

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