METHOD OF DETERMINING STRUCTURE OF GAS FLOW IN COMPRESSOR Russian patent published in 2004 - IPC

FIELD: aircraft manufacturing. SUBSTANCE: invention relates to methods of determining changes of gas dynamic parameters of flow in vane machines, such as compressors, in preset areas of flow both in border zones and in core of gas flow and it can be used for diagnosing condition of gas-turbine engines. According to proposed method uninterrupted synchronous measurements of static and full pressures in oncoming flow are carried out fluctuations of static and full pressures in point of measurement are measured in zone of measurement of each vane and each intervane channel of compressor rotor with subsequent processing of measurements to plot isolines of full and static pressures and corrected flow velocity in absolute motion, to plot misolines of full pressure rise and/or drop and to determine averaged values of above-indicated parameters during multiple passage of gas flow over all vanes of compressor rotor. Invention makes it possible to reveal zone of flow where energy losses are increased and causes of energy losses such as separation of flow of different character, pressure fluctuations at supersonic flow velocity at relative motion in compressor. EFFECT: improved accuracy of measurements of gas dynamic parameters of flow, reliability and information content in investigation of flow structure in compressor. 7 dwg