軸流ターボ機械の羽根車入口逆流の発生機構に関する一考察 : 大きな半径方向流や失速をともなわないヘリカルインデューサの場合

概要

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The occurrence mechanism of an inlet reverse flow was studied in axial flow turbomachinery. A helical inducer, in which there is no accompaniment of stall or significant radial flow, was selected as the experimental piece. The flow between the blades was measured by a laser Doppler-type velocimeter and investigated using the end-wall boundary-layer theory. Results showed that the inlet reverse flow occurs adjacent to the pressure surface between the blades in the vicinity of the casing wall. Inlet reverse flow, caused by the momentum defect in the axial direction at the boundary layer on the casing wall and a significant pressure gradient in the axial direction adjacent to the inlet blade pressure surface in the partial discharge range, was found even though there was no presence of signiticant radial flow or stall.
社団法人日本機械学会の論文
1990-01-25