Secondary flow phenomena in diagonal flow impellers

Tae Whan Kim, Masato Furukawa, Motoo Kuroumaru, Youichi Ando, Shin ichi Higuchi, Masahiro Inoue

研究成果: 書籍/レポート タイプへの寄稿


The measurements of flow fields have been performed by changing tip clearance and flow rate for two diagonal flow impellers with different vortex types, a free vortex type and a vortex type of constant tangential velocity. This paper presents overall behaviors of the secondary flow in the diagonal flow impellers to offer available data for modeling of spanwise mixing due to the secondary flow. The characteristics of the secondary flow are that, in comparison with axial flow impellers, the leakage vortex roll-ups are not seen clearly and the low energy region caused by the tip leakage flow is larger. As the tip clearance increases, the low energy region near the casing becomes larger and shifts toward the suction side of the blade. The low energy region tends to move from the pressure side to the suction side with decrease of the flow rate. For the impeller with a vortex type of constant tangential velocity, there exists a strong secondary flow due to the spanwise loading distribution.

ホスト出版物のタイトルMemoirs of the Kyushu University, Faculty of Engineering
出版ステータス出版済み - 12月 1992

!!!All Science Journal Classification (ASJC) codes

  • エネルギー一般
  • 大気科学
  • 地球惑星科学一般
  • 技術マネージメントおよび技術革新管理


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