A device and method for real-time measurement of flow field distribution at the tip of a compressor

Abstract

The invention provides a compressor blade tip flow field distribution real-time measurement device and method. A groove is arranged in an inner side wall of a casing corresponding to the blade tip of a movable blade of a compressor, and the groove is internally provided with a film sensor. The film sensor is provided with at least one piezoelectric transducer unit and at least one temperature sensor unit. The piezoelectric transducer unit is used for converting blade tip flow field pressure into a pressure electric signal as output, and the temperature sensor unit is used for converting blade tip environmental temperature into a temperature electric signal as output. A signal collection system is used to receive the pressure electric signal and the temperature electric signal on the film sensor, and to convert the pressure electric signal and the temperature electric signal into digital signals, thereby achieving display on a computer. The invention can accurately measure the pressure distribution condition of a compressor dynamic air flow filed without destroying feature conditions such as the flow of the air flow field, the boundary condition and the pressure distribution, and has important theoretical significance and practical values for improving the compressor dynamic feature prediction precision and the compressor design level.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to a real-time measuring device and method for the flow field distribution of a compressor blade tip. Background technique [0002] The compressor is an important part of the aero-engine, and it is of great significance to improve the aerodynamic performance of the engine by using the high-speed rotating blades to do work on the air to achieve the function of increasing the air pressure. Its dynamic characteristics have a very significant impact on the overall dynamic characteristics of the engine. It generally consists of two parts, the rotor and the stator. The rotor includes the rotor shaft and moving blades, and the stator includes the casing and stator blades. In order to prevent the rotor blade from colliding with the casing, the rotor in the compressor needs to leave a certain gap when it rotates at high speed. The pressure distribution of the blade tip has always been a...

AI Technical Summary

Problems solved by technology

There are three main research methods at present: theoretical model, numerical simulation, and experimental measurement (such as the measurement method of miniature five-hole pressure probe), etc. However, the distribution of the air flow field of the compressor in actual work will be different, so it cannot be real-time Get the exact value of the airflow pressure

At present, the acquisition of compressor blade tip pressure mostly relies on theoretical calculation and indirect measurement, which has great limitations in terms of accuracy and real-time performance.

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