二次元振動翼列の非粘性流解析

概要

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A numerical technique for the computation of two-dimensional unsteady inviscid flows through an oscillating cascade is presented. To consider the oscillational phase difference between two blades, a concept of time phase shift is introduced on the periodic boundaries. A finite volume method is used to obtain the spatially discretized governing equations, while the second-order accurate Adams-Bashforth method is employed for the time integration. The example problems are the unsteady flows through oscillating cascades of the lens-type blades and compressor blades, and oscillational phase difference is chosen as a computational parameter. The present method gives unsteady periodic flow fields including the aerodynamic forces and moments acting on the blade clearly, and the positive damping energies are obtained in both test problems through all oscillational phase differences.
一般社団法人日本機械学会の論文
1991-09-25