文档介绍：第41卷第9期 2007年9月上海交通大学学报 JOURNAL OF SHANGHAI JIAOTONG UNIVERSITY Vol. 41 No. 9 Sep. 2007 文章编号:1006-2467(2007)09-1518-04 大宽度无叶扩压器旋转失速特征的数值分析高闯(上海交通大学 谷传纲,王形,戴正元动力机械及工程教育部重点实验室,上海200240) 摘要:采用二维方法,预先给定扩压器入口的射流一尾迹分布,忽略边界层的影响,对一具有大宽度无叶扩压器进行了数值模拟;分析了扩压器长度、:对于宽度不同的扩压器存在不同的失速机理,相关结论和文献结果的比较也证实了该方法的正确性. 关键词:无叶扩压器;旋转失速;大宽度比;射流一尾迹中图分类号:TH 452 文献标识码:A The Numerical Analysis of Rotating Stall Characteristics in Vaneless Diffuser with Large Width-to-Radius Ratio GAO Chuang,GUCh (Key Lab. for Power uan-gang,WANG Tong,DAI Zheng-yuan Machinery and Eng. of Ministry of Education, Shanghai Jiaotong Univ.,Shanghai200240,China) Abstract:Two-dimensional model,where the influence of wall boundary layers is neglected and inlet jet- wake velocity patterns are prescribed,was applied to simulate one vanless diffuser with large width-radius ratio. The impact of diffuser length, impeller blade number, etc on the rotating stall was analyzed. putational results show that different mechanism does exisit for the diffuser with different width-radius ratio. Comparison of the related conclusions and references is supportive for the correctness of the model. Key words:vaneless diffuser;rotating stall;large width-radius ratio;jet-wake 旋转失速是一种在小流量下限制离心压缩机运流现象进行研究,并提出了预测扩压器内部回流开行范围的非稳定流动现象