Abstract

This paper details experimental and studies on the secondary flow losses generated in highly loaded LPT (Low-Pressure Turbine) cascades. Secondary flow loss in LPT significantly contributes to its overall loss, especially in increased stage loading and high-lift airfoil cases. Hence it becomes more important to reduce the secondary flow loss. In the present study, we focus on the effects of load distributions on the secondary flow loss in the highly loaded turbine blade as a method of loss reduction. Detailed experiments are carried out in the cascade outlet endwall region using a 5-hole pressure probe.

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