書誌事項
- タイトル別名
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- Unsteady Behavior and Control of Diffuser Leading-Edge Vortex in a Centrifugal Compressor(Fluids Engineering)
- 遠心圧縮機ディフューザに発生する前縁渦の非定常挙動と制御
- エンシン アッシュクキ ディフューザ ニ ハッセイ スル ゼンエンウズ ノ ヒテイジョウ キョドウ ト セイギョ
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説明
The unsteady behavior of a vortex generated on the diffuser leading-edge, which is called the leading-edge vortex (LEV), is discussed through experiments and numerical simulation. The LEV is different from the separating vortex of the diffuser leading-edge and passage vortex of the diffuser, develops rapidly with a decrease in the compressor mass flow rate, and forms a flow blockage in diffuser passages. Therefore, the evolution of the LEV may become a cause of diffuser stall. Additionally, in one attempt to control the LEV, two types of tapered diffuser vanes, which are shroud- or hub-side tapered diffuser vanes, were adopted. Though the shroud-side tapered diffuser vane can effectively reduce the compressor noise level, the compressor performance deteriorates remarkably. On the other hand, the hub-side tapered diffuser vane not only reduces the compressor noise level but also improves the compressor performance. According to the visualization results of the oil-film methods and numerical simulations, the hub-side tapered diffuser vane can suppress the evolution of the LEV in the compressor low-flow-rate operation.
収録刊行物
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- 日本機械学会論文集B編
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日本機械学会論文集B編 76 (772), 2039-2049, 2010
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390282681271040768
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- NII論文ID
- 110008006787
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- NII書誌ID
- AN00187441
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- ISSN
- 18848346
- 03875016
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- NDL書誌ID
- 10955030
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可