Abstract

A comparison of mistuning effects on the torsional flutter suppression between fully stalled and unstalled cascades is made focusing on fluctuation of the natural frequency and blade arrangment. Numerical results are obtained concerning fundamental characteristics of flutter suppression effects. In both stalled and unstalled cascades, the larger the fluctuation in natural frequency the more stable the cascade. Furthermore, the difference of flutter mode variations caused by mistuning between both cascades is clarified.

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