圧縮機動翼列・静翼列システムの過渡流れに関する二次元圧縮性NS方程式の数値解析 : 第1報, 等ピッチ動・静翼列の始動過程

概要

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A numerical simulation of unsteady flow behavior in linear cascades of a compressor rotor and stator system is conducted by applying a TVD finite difference scheme. Two-dimensional compressible N-S equations are solved iteratively in a rotor-fixed moving frame and in a stator-fixed stationary frame in order to match data along the sliding boundary, and the flow induced by the motion of the initially stationary rotor is analyzed. In addition to accelerating and final-state flow patterns, a stall pattern is obtained by throttling a resistance specified at the discharge boundary. Configurations of vortices detached from the blade during the flow acceleration, formation and convection of the rotor wake, and growth of the stall separation are satisfactorily demonstrated. The stage performance and the rotor wake profile in the final state at the blade Mach number of 0.18 show very similar features with compressor test data. However, partly due to a rather coarse mesh along the blade, the performance involving the stall margin is lower than the test result.
社団法人日本機械学会の論文
1992-09-25