スパイク型旋回失速発生過程に及ぼす動翼先端漏れ流れの影響(流体工学,流体機械)

概要

論文の詳細を見る
We measured pressure fluctuations and distributions on the casing wall in a low speed axial-flow fan with relatively large tip clearance to clarify the criteria for a spike-type stall inception. The blade loading at the rotor tip and the tip leakage flow were compared between the two stagger angle settings for the rotor blade. Spikes appeared at the design stagger angle setting, and did not appear at the high stagger-angle setting, which was ten degrees larger than the design value. A rotating instability, which was induced by an interaction among the incoming flow, tip leakage flow, and end-wall backflow, was confirmed near the maximum pressure-rise point at both stagger angle settings. At the design stagger angle, the interface of this interaction became parallel to the leading edge plane. This interaction moreover generated a large end-wall blockage near the leading edge. This blockage developed a leading edge separation on the stalled rotor at the tip, and the leading edge separation then grew into a spike. In contrast, at the high stagger angle, the interface of this interaction did not become parallel to the leading edge plane, and the end-wall blockage was smaller than that at the design stagger angle. The leading edge separation therefore neither developed nor grew into a spike although the rotor blade at the tip stalled. We concluded from these results that the large end-wall blockage induced by the interaction among the incoming flow, tip leakage flow, and end-wall backflow was the main criterion for the spike type stall inception.
社団法人日本機械学会の論文
2007-08-25

スパイク型旋回失速発生過程に及ぼす動翼先端漏れ流れの影響(流体工学,流体機械)

スポンサーリンク

概要

著者

関連論文

スポンサーリンク