A flow continuous calibration system and method for a high-temperature gas regulator

Abstract

The invention discloses a system and method for continuously calibrating the flow rate of a high-temperature gas regulator. In the system, the gas outlet of the gas generator is installed with a main pipeline, and the main pipeline is sequentially provided with a throttling ring and an outlet throat pipe along the gas flow direction; The inlet of the branch pipeline is connected to the main road between the gas generator and the throttle ring, and the outlet of the branch pipeline is connected to the main road between the throttle ring and the outlet throat pipe; the gas regulator to be calibrated is installed on the branch pipe On the road; there are two pressure sensors, located on the inlet side and outlet side of the throttle ring respectively; the temperature sensor is located on the inlet side of the throttle ring. The invention utilizes the characteristic that the inlet and outlet pressure ratios of the gas regulator under the real working conditions of the engine are equivalent to the inlet and outlet pressure ratios of the gas regulator in the ground test system, simplifies the calibration steps of the flow coefficient of the gas generator, and effectively reduces the The number of ignition times and the number of supporting products required for the calibration process of the gas regulator are low in cost.

Description

technical field [0001] The invention belongs to the field of aerospace technology, and in particular relates to a flow continuous calibration system and method for a high-temperature gas regulator Background technique [0002] In order to achieve a wide range of operating conditions for high-pressure afterburning cycle engines, it can be realized by setting a gas regulator in the gas circuit. At this time, due to the particularity of the working medium, there are significant differences in the thermodynamic properties of the ground cold air and hot air and the real gas, and the characteristic relationship between the gas regulator's rotation angle, flow rate and pressure drop obtained through the ground air is quite different from that of the real medium. [0003] In order to achieve precise adjustment of engine thrust, the flow characteristics of the gas control valve in real media must be obtained in the ground assessment test. Under ideal conditions, it is necessary to s...

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Problems solved by technology

[0004] In order to solve the problem of obtaining the flow characteristics of the gas control valve under the real medium in the ground assessment test in the background technology, only a single working point test can be carried out, and each test must be ignited by a separate gas generator to obtain high-temperature and high-pressure oxygen-enriched gas, resulting in the test For the problems of too much cost and complicated test process, the present invention provides a flow continuous calibration system and method for high-temperature gas regulators, which greatly simplifies the calibration test system and operation process

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