A water-cooled pressure measurement probe for high-enthalpy airflow

Abstract

The invention relates to a water-cooled pressure measuring probe applicable to high-enthalpy airflows. The water-cooled pressure measuring probe comprises a casing, a first sealing member, a second sealing member, a first air inlet pipe, a second air inlet pipe, a test hole, a support member and a bottom plate. The casing comprises an outer casing and an inner casing, the outer casing is providedwith a first water inlet and a first water outlet, and a hollow interlayer with a closed rear end is arranged between the outer casing and the inner casing. The hollow interlayer comprises a front region and a rear region, the front region is divided into an upper cavity and a lower cavity by two blocking portions arranged along the length direction of the casing, the upper cavity is communicatedwith the rear region, and a sealing portion is arranged between the lower cavity and the rear region for sealing. The first water inlet is located on the lower side of the lower cavity, and the firstwater outlet is located on the lower side of the rear region. The first sealing member comprises an outer sealing member for sealing the front end of the outer casing and an inner sealing member for sealing the front end of the inner casing, and a front cavity communicated with the upper cavity and the lower cavity is formed between the outer sealing member and the inner sealing member. The water-cooled pressure measuring probe can meet the measurement requirements for the stagnation pressures of ground simulation tests for heat-insulating materials by high-enthalpy devices.

Description

technical field [0001] The invention relates to the technical field of ground heat protection tests, in particular to a water-cooled pressure measurement probe suitable for high-enthalpy airflow. Background technique [0002] The development of hypersonic vehicles is the long-term strategic goal of my country's aerospace field in the future. It is subjected to severe aerodynamic heating in the harsh service environment, and the high heat flux and high temperature generated seriously threaten the safety of the aircraft and personnel. Conduct ground simulation tests for thermal protection materials. Since the flow field parameters and flow chemical state in the high-temperature boundary layer control the aerodynamic thermal load on the surface of the hypersonic vehicle, in the ground simulation test, it is necessary to ensure that the "three parameters" such as conventional pressure, heat flow, and enthalpy are consistent with the flight environment, so It is particularly impo...

AI Technical Summary

Problems solved by technology

If a conventional pressure measurement probe is used for pressure measurement, the high-enthalpy, high-temperature airflow will burn the pressure measurement probe, causing the temperature of the intake air in the pressure probe to rise and expand, which will seriously affect the test results. Therefore, it is necessary to design a Water-cooled pressure measurement probe ensures the accuracy of pressure results and meets the needs of ground simulation tests

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