Supersonic steady-state pressure probe comb for reducing blockage effect of supporting rod by utilizing plasma jet

Abstract

The invention belongs to the technical field of flow field pressure testing, and particularly relates to a supersonic steady-state pressure probe for reducing the blockage effect of a supporting rod by utilizing plasma jet. The supersonic steady-state pressure probe comb is characterized in that a probe head comprises a plurality of steady-state pressure probes and is welded with a probe comb supporting rod; a pressure guide pipe is packaged in the probe comb supporting rod and a mounting base, one end is communicated with a pressure measuring hole in the probe head, and the other end is led out from the tail of the mounting base; the probe comb supporting rod is welded with the mounting base, and internally comprises a plurality of mutually independent structures, namely, a pressure guidepipe channel and plasma generation cavities; a high-voltage trigger electrode, an anode and a cathode are arranged in the plasma generation cavity; and the plasma generation cavity is provided with acontracted jet groove which is communicated with the downstream of the probe comb supporting rod. According to the invention, plasmas are generated in the plurality of plasma generation cavities, andair blowing and sucking effects are generated around the probe comb supporting rod through the jet flow groove, so that the blockage effect of the probe comb supporting rod can be effectively weakened, and the interference of the supporting rod to a measured flow field is reduced.

Description

technical field [0001] The invention belongs to the technical field of flow field pressure testing, and in particular relates to a supersonic steady-state pressure probe comb which uses plasma jets to reduce the clogging effect of struts, and is suitable for supersonic steady-state flow fields along the height direction of blades in turbomachinery Multi-point pressure measurement. Background technique [0002] In the supersonic steady-state flow field measurement of turbomachinery such as compressors, turbine inlets and interstages, contact pressure measurement devices are usually used to obtain flow field parameters such as total pressure, static pressure, Mach number, and airflow angle. There are two types of pressure measuring devices: single-point pressure probe and multi-point pressure probe comb. [0003] The multi-point pressure probe comb is generally composed of 3 to 5 three-hole, four-hole or five-hole pressure probes. These probes need to be supported by rods and...

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Problems solved by technology

[0006] Aiming at the problem that the existing pressure probe combs will interfere with the measured flow field and cause blockage when measuring the total pressure, static pressure, Mach number, airflow angle and other parameters of the supersonic steady-state flow field, the present invention A supersonic steady-state pressure probe comb using plasma jets to reduce the clogging effect of the struts is proposed. Multiple plasma generators are arranged inside the struts of the probe comb. The jet groove produces air blowing and air suction around the probe comb rod to achieve the effect of controlling the wake of the rod, thereby reducing the blocking effect of the rod and the interference to the measured flow field

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