軸流圧縮機でのアクティブストール制御の研究 : 第2報:あるストール抑制手法

概要

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A new technology of stall suppression has been developed to expand the stable range of axial flow compressor operation. A system stability consideration indicates that flow separation in the tip region is critical to compressor stall because of steep growth of the total pressure loss. In order to reduce the airflow rate of separation generation in this region, a standing stall was artificially formed in the hub-side part of the compressor passage by movable flaps set ahead of the rotor. By applying an actuator disk model on compressor flow disturbed by a radial distortion plate it was found that the forced stall did not grow in the hub side. Several tests of such hub-stall method showed considerable expansion of stable working range of the compressor as expected. The combined test with an early stall warning technique, developed originally by the authors, demonstrated that an active stall control is realized successfully.
2006-05-20