ガスタービン圧縮機の旋回失速時における翼振動解析手法 : 第1報, 圧縮機の非定常特性を利用した簡易解析手法

概要

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The characteristics of dynamic pressure and blade vibration during rotating stall are summarized by tests of a 17-stage compressor, and a simple analytical method for evaluating fluid exciting force and predicting blade vibration stress in presented. The blade exciting force model is derived by using the unstable characteristics of compressors. The blade vibration stress is numerically simulated and compared with the measured stress. The results can be summarized as follows. First, the simulated time history of blade vibration agrees well with the measured one. Second, in resonance where the natural frequency of blade vibration coincides with multiples of the exciting frequency of rotating stall, the amplitude of blade vibration becomes about two times larger than that except resonance, even if the multiples are five to seven. Third, the change in stall cell width causes the change in blade vibration amplitude.
社団法人日本機械学会の論文
2000-10-25