Flow meter calibration system and method for cryogenic propellant rocket motor

Abstract

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, in order to solve the low accuracy of flowmeter measurement when the existing low-temperature propellant rocket engine uses a flowmeter for flow measurement , and only a short period of reference flowmeter calibration can be performed. The technical solution adopted in the present invention is: a flowmeter calibration system for a low-temperature propellant rocket engine, including a container filling unit, a container, a supply pipeline, a weighing unit, a quick recovery container, a weighing filling recovery unit and recovery unit; container filling unit is used to connect tanker and container; supply line includes temperature sensor and pressure sensor, and first isolation valve, reference flow meter, calibrated flow regulating hand valve, vertical A main pipe and N horizontal pipes uniformly distributed on the circumference. The invention also provides a method for calibrating the flowmeter of the low-temperature propellant rocket motor.

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...

AI Technical Summary

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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