タービン翼列の空力特性に対する後流干渉効果 : 第2報後流の減衰特性

概要

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This paper demonstrates the detailed measurements of the time-varying flow field downstream of the turbine cascade and the moving bars. Through the measurements using a quasi-X probe, pitchwise distributions of the ensemble-averaged velocity at the midspan are acquired. These temporal velocity data are transformed into velocity vectors by use of Taylor's frozen model, which also enables the calculation of the vorticity associated with the incoming wakes. The resultant velocity vectors and the vorticity distributions provide clear images of the defotmation of the incident bar wakes that are bowed and directed to the suction side of the blade wake. Comparisons between the measurements and correlations of the bar wake decay show that the wake decay process through the cascade is more gradual than that in the uniform flow field.
社団法人日本ガスタービン学会の論文
1999-05-20