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METHOD FOR DETERMINATION OF AXIAL COMPRESSOR PARAMETERS AT THE BASIC POINTS OF STALLING BRANCH CHARACTERISTICS

Volume 40, Issue 3, 2009, pp. 333-353
DOI: 10.1615/TsAGISciJ.v40.i3.50
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ABSTRACT

Presented in this work is a method for calculation of compressor characteristics at a fully developed rotating stall regime with a single flow separation zone covering the entire height of the annular duct of the compressor flow at a constant rotational speed. The method enables sufficiently accurate prediction of the compressor parameters πk and ηk on the left (stalling) branch of the compressor characteristics, including the points of the stall end boundary, as a function of the flow coefficient, the angle extension of stall zone, and of the pressure ratio at the stall point on the right (nonstalling) branch of the characteristic. The method also ascertains the dimension of the hysteresis loop. The extension of the stall zone is shown to be the significant parameter determining the compressor performance at the stall regime.

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