ラジアルタービンのロータ性能に及ぼす流入速度分布ひずみの影響　　ロータ翼数が１０枚と２０枚の場合の比較

速水 洋, 玄 容翊, 妹尾 泰利, 山口 過照

doi:10.1299/kikaib.55.2729

ラジアルタービンのロータ性能に及ぼす流入速度分布ひずみの影響　　ロータ翼数が１０枚と２０枚の場合の比較

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書誌事項

タイトル別名

Effects of inlet flow distribution on performance of radial turbine rotor. Comparison of a 10 blade rotor with a 20 blade rotor.
ラジアルタービンノロータセイノウニオヨボスリュウニュウソクド

公開日: 1989

DOI

10.1299/kikaib.55.2729

公開者: 一般社団法人日本機械学会

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説明

In radial turbines with variable nozzles, the downstream flow of the nozzles is distorted by the leakage flow through the tip-clearance of the upstream nozzle vanes. To investigate the effects of flow distortion on the performance of turbine rotors, two rotors with different numbers of blades were tested for three types of distorted velocity distributions at the rotor inlet. In the case of the 20 blade rotor with moderate blade loading, the flow distortion at the rotor inlet had negligible effect on the rotor characteristics, and the measured data on the turbine performances agreed well with the prediction. In the case of the 10 blade rotor with heavy blade loading, however, the rotor performance was found to be sensitive to the inlet flow distortion and was considerably lower than the prediction.