低比速度斜流ポンプの案内羽根間流路を通る流れ : 第2報,入射角の流路幅方向変化の影響と損失の検討 (<小特集>タ-ボ機械の内部流れと定常・否定常特性)

概要

論文の詳細を見る
Effects of incidence angle variation in the vane height direction on the flow pattern through guide vanes were investigatd. The secondary flow along the hub wall turns upstream near the middle spacing between the vanes when the inlet flow forms a negative incidence angle on the hub side. Its flow unites with the through flow from the inlet and rolls up widely in the passage. With increasing incidence angle, the secondary flow approaches the suction surface and eventually forms a strong vortex on the hub wall, without rolling up in the middle spacing. The effects of this strong vortex on the downstream flow, however, are almost the same as those of the rolling up. Moreover, it was discussed that the hydraulic loss of the guide vanes can be predicted accurately from the bending loss obtained from the actual flow turning angle and the shock loss at the inlet. It may be necessary for the case of guide vanes with extremely large camber angle to taken into account the mixing loss based on the flow distortion at the outlet.
1995-11-25