Continuous flow calibration system and method of high-temperature gas regulator

Abstract

The invention discloses a continuous flow calibration system and method for a high-temperature gas regulator. The system is characterized in that a gas outlet of a gas generator is provided with a main pipeline, and the main pipeline is sequentially provided with a throttling ring and an outlet throat pipe in the gas flowing direction; an inlet of a branch pipeline is connected to the main pipeline between the gas generator and the throttling ring, and an outlet of the branch pipeline is connected to the main pipeline between the throttling ring and the outlet throat pipe; a to-be-calibrated gas regulator is mounted on the branch pipeline; e two pressure sensors are arranged on the inlet side and the outlet side of the throttling ring respectively. A temperature sensor is arranged on the inlet side of the throttling ring. The characteristic that the inlet and outlet pressure ratio of the gas regulator under the real working condition of the engine is equivalent to the inlet and outletpressure ratio of the gas regulator in a ground test system is utilized, the step of calibrating the flow coefficient of the gas generator is simplified, so that the ignition frequency and the numberof matched products required in the calibration process of the gas regulator are effectively reduced, and the cost is low.

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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