离心压气机失速模式及自循环机匣处理的作用机制

康剑雄; 黄国平; 朱俊强; 温殿忠

doi:10.13224/j.cnki.jasp.2015.12.020

离心压气机失速模式及自循环机匣处理的作用机制

doi: 10.13224/j.cnki.jasp.2015.12.020

1. 南京航空航天大学能源与动力学院江苏省航空动力系统重点实验室, 南京 210016;
2. 中国科学院工程热物理研究所轻型动力重点实验室, 北京 100190;
3. 中国航空工业集团公司中国航空动力机械研究所, 湖南株洲 412002

基金项目:

基础科研项目(B1320110070)

详细信息

作者简介:
康剑雄(1979-),男,湖南郴州人,博士生,主要从事推进系统内流流动控制研究.

中图分类号: V231.3
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出版历程
- 收稿日期: 2014-04-27
- 刊出日期: 2015-12-28

Stall mode of centrifugal compressor and mechanism of self-recirculating casing treatment

1. Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
2. Key Laboratory of Light-duty Gas-turbine, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;
3. China Aviation Powerplant Research Institute, Aviation Industry Corporation of China, Zhuzhou Hunan 412002, China

摘要

摘要: 通过对离心压气机不同转速下实壁机匣和处理机匣两种状态流场的数值模拟,研究了失速模式随转速的变化及不同失速模式下机匣处理作用机制的转变.结果表明:随转速的降低,失速模式由100%设计转速时的扩压器失速逐步向导风轮失速过渡,导风轮失速也经历了由80%设计转速时的端壁失速和叶片前缘失速向50%设计转速的通道大范围完全失速的发展过程.自循环机匣处理对离心压气机失速裕度和效率的影响都与失速模式紧密相关,其扩稳作用仅对80%设计转速时的叶片前缘失速有效.在80%左右设计转速,机匣处理使主流效率有朝大流量工况点变化的趋势,从而使效率降低.当转速低至50%设计转速时,主流通道形成大范围回流区,机匣处理的二次回流可以减少叶轮对通道回流区气流的做功量,从而提高效率.
- 机匣处理 /
- 失速模式 /
- 失速裕度 /
- 压气机效率 /
- 离心压气机
Abstract: In order to explore the variation of stall mode with changing speed and the mechanism transition of casing treatment under different stall modes, numerical simulation of a centrifugal compressor with solid wall casing and casing treatment under different speeds was performed. The results showed that the stall mode transited from diffuser stall at 100% design speed to inducer stall with the speed decrease. Inducer stall also experienced from end wall stall and blade leading edge stall at 80% design speed to wide-range full stall at 50% design speed. The effect of self-recirculating casing treatment on stall margin and efficiency of centrifugal compressor were closely related to the stall mode, its stability enhancement effect was only valid for the blade leading edge stall at 80% design speed. At about 80% design speed, casing treatment tended to bring about bigger flow rate operating point for the main flow efficiency, thus reducing the efficiency. When the speed was low enough to 50% design speed, with a wide recirculation region in main flow passage, the secondary reverse flow in casing treatment could reduce the load of the impeller to passage recirculation region, so as to improve the efficiency.
- casing treatment /
- stall mode /
- stall margin /
- compressor efficiency /
- centrifugal compressor

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参考文献(20)

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