ポンプ水車案内羽根のポンプ流れにおけるねじりフラッタ

概要

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Present paper aims to yield a theoretical basis for the torsional flutter of guide vanes in the pump stage of pump-turbines. The guide vanes are assumed to oscillate torsionally about their axis with arbitrary intervane phase differences in the outward flow of pump stage. A theoretical analysis by the singularity method is developed for steady and unsteady flows of guide vanes under the assumption that the former is of finite order of magnitude compared with the latter of infinitely small order. Torsional flutter of guide vanes is shown to occur at low reduced frequency and for small valve opening for two intervane phase differences of 90° and 270°, and then some theoretical explanations are paid from notable features of unsteady pressure distributions and unsteady moment.
一般社団法人日本機械学会の論文
1988-02-25