A Behavior of the Diffuser Rotating Stall in a Low Specific Speed Mixed-Flow Pump
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- MIYABE Masahiro
- 酉島製作所
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- FURUKAWA Akinori
- 九州大学
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- MAEDA Hideaki
- 酉島製作所
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- UMEKI Isamu
- 酉島製作所
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- JITTANI Yoshinori
- 酉島製作所
Bibliographic Information
- Other Title
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- 低比速度斜流ディフューザポンプにおける旋回失速挙動
- テイヒ ソクド シャリュウ ディフューザポンプ ニ オケル センカイ シッソク キョドウ
Search this article
Abstract
The flow instability in a low specific speed mixed-flow pump, having a positive slope of head characteristic curve was investigated. After it was found from pressure measurement that a rotating stall in the vaned diffuser caused the instability, dynamic Particle Image Velocimetry (PIV) measurement and numerical simulation of Computational Fluid Dynamics (CFD) were carried out. Then, the rotating stall is simulated even in CFD and calculated patterns of instantaneous velocities agree well with measured ones by dynamic PIV. It is indicated that a periodical large scaled backflow, generated at the leading edge of the suction surface of the diffuser vane, causes the instability. Moreover, the growth of the strong vortex towards the leading edge of diffuser vane induces the strong backflow from the diffuser outlet to the inlet. The scale of one stall cell is covered over four-passages in thirteen vane-passages.
Journal
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- Turbomachinery
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Turbomachinery 35 (2), 113-121, 2007
Turbomachinery Society of Japan
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Details 詳細情報について
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- CRID
- 1390282679522573824
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- NII Article ID
- 10018722093
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- NII Book ID
- AN00004836
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- ISSN
- 18802338
- 03858839
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- NDL BIB ID
- 8663340
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed