1629 遷音速軸流圧縮機動翼列における旋回失速初生の数値解析(J12-1 流体機械に関連した流体解析と数値最適化技術(1),J12 流体機械に関連した流体解析と数値最適化技術)

概要

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The purpose of this study is to better understand the unsteady behavior of tip leakage flow in rotating stall inception and to investigate the dominant mechanism of stall inception. A 3D URANS calculation was conducted to simulate the spike-type stall inception of a transonic axial compressor rotor (NASA Rotor 37). The simulation was run with a four-passage grid that could capture the rotating disturbance in the spike-type stall inception. The simulation demonstrates that the unsteadiness of tip leakage vortex, which has been caused by the vortex breakdown at near-stall condition, brings about the flow phenomenon similar to "spillage" and invokes the rotating disturbance in the stall inception.
社団法人日本機械学会の論文
2007-09-07