非圧縮流から超音速流までの翼列振動時翼間空力干渉及びフラッタ特性に関する研究

概要

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The effects of compressibility and shock wave on the interblade interactions during vibration and on the flutter characteriscs of the cascaded blades row are studied based on the experimental data obtained by using a water tunnel for incompressible case and a freon gas wind tunnel for compressible case with adopting an "one blade oscillation method" for high turning turbine cascade. The unsteady aerodynamic coefficients for interblade interaction are useful for the flutter problem not only of the uniform cascade but also of the general nonuniform cascade. There are shown a simple method for solving flutter deteminant for a general cascade with nonuniform natural elastic compliances, and some examples calculated using the obtained experimental data for an improvement of flutter characteristics by making the natural elastic compliances of blades in cascade actively nonuniform.
社団法人日本ガスタービン学会の論文
1989-12-10