Torsional Flutter of Stalled and Unstalled Mistuned Cascades (Effect of Natural Frequency and Blade Arrangement on Mistuning Flutter)

摘要

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