J0501-2-1 軸流ファンにおける旋回不安定じょう乱の発生点付近での動翼先端流れ場([J0501-2]流体機械の研究開発におけるEFD/CFD(2))

概要

論文の詳細を見る
Numerical and experimental studies were carried out to clarify the mechanism behind the stall inception from the rotating instability in a low-speed axial-flow fan. The rotating instability was experimentally observed near the maximum pressure-rise point at the high stagger-angle setting for the rotor blade. The rotating instability was induced by the interaction between the incoming flow, the reversed tip-leakage flow, and the back flow from the trailing edge. Spillage from the leading edge initiated near the inception point of the rotating instability. Tip-leakage vortex breakdown also occurred at the stall point. However, a three- dimensional separation vortex did not develop at the stall point. The numerical and experimental results suggested that the spillage from the leading edge and the tip-leakage vortex breakdown, which did not induce the three-dimensional separation vortex, influenced the stall inception from the rotating instability.
一般社団法人日本機械学会の論文
2010-09-04