The mechanism of stall margin improvement in a centrifugal compressor with the air bleeding circumferential grooves casing treatment

摘要：

The air bleeding circumferential grooves casing treatment has the potential to extent the operating range of centrifugal compressor with no loss in efficiency. A time accurate 3-dimentional numerical simulation was performed in a low speed centrifugal compressor with the air bleeding circumferential grooves casing treatment. The numerical results agreed well with experimental test data for the global performance. Detailed analyses of the ow visualization at the tip of blades have exposed the different tip ow topologies between the cases with casing treatment and with untreated smooth wall, and the reasons how the second ow vortex is retrained. The mechanism of stall margin improvement is gained finally.

关键词： centrifugal compressor circumferential grooves casing treatment air bleeding second flow

作者: P.Gao W.L.Chu Y.H.Wu

作者单位: College of Power and Energy, Northwestern Polytechnical University, Xi’an 710072, China

会议类型: 国际会议

会议名称: The Fifth International Conference on Fluid Mechanics(第五届国际流体力学会议)

会议地点: 上海

会议语种:英文

在线出版日期: 2007-08-15（万方平台首次上网日期，不代表论文的发表时间）