A type of compressor to low speed characteristic extrapolation method

The present invention solves the conventional push down the outer compressor speed characteristic method of not taking into account the compressibility of the working fluid issues low speed characteristic, discloses a low-speed characteristic A type of compressor outer extrapolation method. This method is suitable for obtaining the low speed characteristic of the compressor and turbine aeroengine ground acquisition, wherein: an outer low speed characteristic considered extrapolation method similar principle and application conditions of low compressor speed condition of features, the principle is similar to the index were improvement, obtaining optimal Trends optimization algorithm, and the gas turbine off coefficient calculated fitting low compressor speed characteristic used extrapolation, obtaining low speed characteristic. Low speed characteristic outer compressor employed in the invention, the push method, and genetic algorithm obtained by a similar principle and most widely used method is the index value.