带放气型周向槽的离心压气机失速控制研究  

Stall Control of a Centrifugal Compressor with Air Bleeding Circumferential Grooves Casing Treatment

作　　者：高鹏[1] 楚武利[1] 吴艳辉[1] 李强[1] 

机构地区：[1]西北工业大学动力能源学院,陕西西安710072

出　　处：《计算机仿真》2008年第12期332-336,345,共6页Computer Simulation

基　　金：国家自然科学基金(50506026)

摘　　要：机匣处理技术是工业上压气机解决气动失稳问题最常用的手段。然而离心压气机内部流场极其复杂,呈强烈三维紊流特性,由于目前实验条件的限制,只有依靠精确的计算机仿真模拟,才能获得其内部流场的详细情况。现提出一种在周向槽机匣处理的基础上增加放气的机匣处理方案,并就方案在离心压气机上进行了精确的计算机仿真,将计算结果与实验结果进行了比较,并详细对比分析了带实壁机匣和放气型周向槽处理机匣的压气机转子顶部区域流场结构,及叶片通道内二次流动情况,结果表明:放气型周向槽机匣处理结构使得离心压气机在扩大稳定裕度的同时压气机效率有所改善,并分析得到放气型周向槽机匣处理的扩稳机理。The casing treatment technology is widely used to solve the aerodynamic stability problem in industry domain. As the inner flow - field of centrifugal compressor is very complicated, the flow - field has strong 3 - D and turbulence characteristic. Owing to the limitation of experiment technology, the only way to gain the right and detailed inner flow - field is to use computer simulation method at present. A 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 flow visualization at the tip of blades have exposed the different tip flow topologies and influence of second flow between these two casing. It is concluded that the air bleeding circumferential grooves casing treatment has the potential to extend the operating range of compressor without loss of efficiency. The Mechanism of Stall Margin Improvement is gained finally.

关 键 词：离心压气机 周向槽机匣处理 放气 二次流动 数值模拟 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]