軸流圧縮機のサージングと旋回失速に関する研究 : 第4報, 多段翼列に対する解析手法によるパラメータ計算

抄録

In this paper, the effects of various parameters on the inception and post-stall characteristics of surge and rotating stall in axial compressors are investigated, using a numerical model for multiblade-row compressors. The parameters described in this paper are the shape of total pressure-loss and deviation characteristics, IGV (Inlet Guide Vane) outlet flow angle, inlet flow distortion, and bleeding. It is found that there exist two types of rotating stall differing in magnitude, that inlet distortion and deterioration in compressor performance reduce the inception margin of unstable behavior, and that an optimal bleeding exists which can optimize the inception margin of unstable behavior. The usefulness of the present model is examined through numerical investigation. The validity of the model is also discussed by comparison with test results in a 3-stage compressor.