渦モデルによる旋回失速の数値解析

概要

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Flow behavior of rotating stall in a linear cascade of NACA 65 (CA30) 10 blades with a solidity of 1.0 and stagger angle of 30 degrees, is studied numerically. The numerical method which was developed for two-dimensional incompressible separated flows of high Reynolds number around an isolated blade has been extended and used for cascades of blades. Flow behavior and timewise variation of mass flow through each blade passage clearly show the propagative features of rotating stall for a wide range of inlet flow angles. The phenomenon of stall vortex shedding, which is similar to that around isolated blades, is observed to occur in the stall cells. The physical characteristics of rotating stall seem to be well understood in terms of the features of these vortices. The total pressure-loss performance of the cascade is examined for both stalled and unstalled flow regimes. The static pressure and the velocity distributions ahead of the cascade are compared with the features of the actuator disc analysis.
社団法人日本機械学会の論文
1990-03-25