Full-parameter probe for measuring two-dimensional steady-state flow field of boundary layer of outer wall of hub

Abstract

The invention belongs to the technical field of flow field testing, and discloses a full-parameter probe for measuring a two-dimensional steady-state flow field of a boundary layer of an outer wall ofa hub. The full-parameter probe comprises a probe head, pressure sensing holes, a temperature sensor, a heat-insulating sealing element, a pressure guiding pipe, a temperature sensor cable leading-out channel, a pressure guiding pipe leading-out channel and a probe supporting rod. The probe head is cylindrical, and the three pressure sensing holes which are arranged in a shape like a Chinese character 'pin' and are not communicated with one another are formed in the windward side of the probe head; an arc groove is formed in the leeward side of the probe head in the axial direction, and the temperature sensor is arranged in the arc groove so as to prevent a main flow from directly impacting the temperature sensor. Compared with an existing boundary layer probe, the full-parameter probe can simultaneously measure the total temperature, the static temperature, the total pressure, the static pressure, the deflection angle, the Mach number, the density and the two-dimensional speed of thetwo-dimensional steady-state flow field in the boundary layer of the outer wall of the hub, can also measure the flow field in the boundary layer in an air inlet channel of an aero-engine, and has the advantages of being small in size, high in spatial resolution, high in measurement precision and high in reliability.

Description

technical field [0001] The invention belongs to the technical field of flow field testing, and in particular relates to a full-parameter probe for measuring the two-dimensional steady-state flow field of the boundary layer on the outer wall of the hub, which is suitable for the inlet and outlet of compressors, fans, compressors, etc., and the hub side between impeller stages The measurement of the two-dimensional complex flow field in the boundary layer can also take into account the measurement of the flow field in the boundary layer of the aero-engine inlet. Background technique [0002] Due to the viscosity of the airflow, a boundary layer will be formed on the outer wall of the hub between the inlet, outlet and impeller stage of the aeroengine inlet, compressor, fan, compressor, etc., especially between the compressor outlet and the impeller stage, where the rotor rotates, The staggered arrangement of dynamic and static blade rows and the interaction between the blade wa...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems that the current boundary layer probes can only measure the total pressure or velocity alone, resulting in large measurement errors, the combined temperature and pressure probes cannot meet the measurement accuracy of the boundary layer flow field, and the temperature feeling is facing the mainstream and is easy to be damaged. A full-parameter probe that can simultaneously measure the total temperature, static temperature, total pressure, static pressure, deflection angle, Mach number, density and velocity of the two-dimensional steady-state flow field in the boundary layer of the outer wall of the hub

Images