离心压气机无叶扩压段流路控制扩稳机理

王永生; 童志庭; 林峰; 聂超群

离心压气机无叶扩压段流路控制扩稳机理

1.
中国科学院工程热物理研究所先进能源动力重点实验室, 北京 100190
2.
中国科学院研究生院, 北京 100190

基金项目: 国家重点基础研究发展计划(2007CB210104); 国家自然科学基金(51010007)

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出版历程
- 收稿日期: 2011-10-14
- 刊出日期: 2012-09-28

Stall improvement mechanism of vaneless diffuser flow path control in a centrifugal compressor

1.
Key Laboratory of Advanced Energy and Power Chinese Academy of Sciences, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
2.
Graduate University of Chinese Academy of Sciences, Beijing 100190, China

摘要

摘要: 为寻求叶轮-扩压器间无叶扩压段流路控制的扩稳机理,选取某离心压气机为研究对象,利用数值模拟的方法,通过流场分析解释其失速机理,并在此基础上重新设计无叶扩压段机匣结构,探讨一种有效流路控制扩稳方式.分析结果表明:将无叶扩压段机匣结构设计为先收缩后扩张型后,离心压气机稳定工作范围提高了2.8%,但绝热效率有所降低.
- 无叶扩压段 /
- 机匣结构 /
- 流路控制 /
- 扩稳 /
- 离心压气机
Abstract: To investigate the stall improvement mechanism of vaneless diffuser flow path control,a centrifugal compressor was simulated and compared with existing experimental data.According to characteristics of flow field and stall mechanism,a convergent-divergent type of impeller-diffuser casing designed was analyzed.The result shows that the stable flow range of centrifugal compressor increases by 2.8%,however,no obvious positive effects are found on the adiabatic efficiency which is slightly lower than that of the prototype.
- vaneless diffuser /
- casing structure /
- flow path control /
- stall improvement /
- centrifugal compressor

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参考文献(15)

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