Steady temperature pressure combined probe for measuring transonic speed two-dimensional flow field

Abstract

The invention belongs to the technical field of temperature and pressure test, and discloses a steady temperature pressure combined probe for measuring a transonic speed two-dimensional flow field. The steady temperature pressure combined probe comprises a probe head part and a support rod, wherein the probe head part is of a tetragonous columnar structure. During the measurement, the windward side of the probe head part comprises a right front plane, a left side plane and a right side plane; the leeside is a cylindrical arc surface. A pressure sensing hole is respectively formed in the right front plane, a left side plane and a right side plane, and respectively communicates with three pressure leading pipes arranged in the probe head part; a temperature sensing hole is also formed in the right front plane; a temperature sensor is arranged in the temperature sensing hole; the three pressure leading pipes and cables of the temperature sensor are led out of the probe tail part through a passage formed in the support rod. Compared with the existing pressure probe, the steady temperature pressure combined probe has the advantages that through calibration by calibration wind tunnels, the steady temperature, the total pressure, the static pressure, the deflection angle, the mach number and the two-dimensional speed of the transonic speed two-dimensional flow field can be measured at the same time; an efficient, accurate and comprehensive means for measuring transonic speed two-dimensional flow field parameters is provided for turbine experiments.

Description

technical field [0001] The invention belongs to the technical field of flow field temperature and pressure testing, and relates to a steady-state temperature and pressure measuring device for a transonic two-dimensional flow field, in particular to a steady-state temperature-pressure combined probe for measuring a transonic two-dimensional flow field. It is suitable for testing the transonic two-dimensional steady-state flow field at the outlet of centrifugal compressor impeller. Background technique [0002] To measure the transonic two-dimensional steady-state flow field at the impeller outlet of a centrifugal compressor, a three-hole pressure probe is generally used at present. With the help of a displacement mechanism installed on the casing, the three-hole pressure probe is driven to the measured position for measurement. The three-hole pressure probe can only provide the total pressure, static pressure, deflection angle and Mach number of the incoming flow. Since the t...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in the current measurement test of the transonic two-dimensional steady-state flow field at the impeller outlet of the centrifugal compressor, different probes such as an independent total temperature probe and a three-hole pressure probe are used to measure , there are problems of long measurement time, high test cost, poor consistency of measurement conditions, and large measurement errors. A steady-state temperature-pressure combination probe for measuring transonic two-dimensional flow fields is provided. The present invention is compatible with existing transonic flow fields. Compared with the pressure probe used in the sonic two-dimensional steady-state flow field test, it can simultaneously measure the incoming flow temperature, total pressure, static pressure, deflection angle, Mach number and two-dimensional velocity components

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