组合机匣处理对跨音压气机流动特性的影响  

Influence of Combined Casing Treatment on Flow Characteristics of Transonic Compressor

作　　者：刘家璇 杨福胜[1] 邓建强[1] 张早校[1] LIU Jiaxuan;YANG Fusheng;DENG Jianqiang;ZHANG Zaoxiao(School of Chemical Engineering and Technology,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学化学工程与技术学院,西安710049

出　　处：《西安交通大学学报》2020年第4期173-178,共6页Journal of Xi'an Jiaotong University

基　　金：国家重点研发计划资助项目(2017YFB0903600).

摘　　要：针对当前单一流动控制技术在压气机优化方面存在影响范围不大、性能提升有限的不足,提出了一种轴向倾斜缝和抽吸槽相结合的组合机匣处理结构,采用定常数值模拟研究了两种流动控制技术的结合对跨音压气机流场特性及性能的影响。模拟结果表明:应用该组合机匣处理结构后,转子在峰值效率下降2.5%的前提下使失速裕度提高了5.52%,明显改善了转子的性能;组合机匣处理除了能同时改善叶顶和端壁的流动之外,两种结构的复合影响使激波强度降低、流体分离减弱,低速范围明显减小;尽管两种结构的相互作用能为低能流体提供能量,但射流与主流流动发生的掺混带来了一定的掺混损失,增加了主流的切向动量及二次流损失,引起转子效率降低。To expand the influence range of flow control technology and further improve the performance of rotor,a combined casing structure with axial skewed slots and suction slots is presented,and the influences of the combination of two flow control technologies on the flow field characteristics and performance of the transonic compressor are investigated numerically by steady state simulation.The results show that the stall margin is increased by 5.52%while the peak efficiency reduces by 2.5%,which indicates the significantly improved performance of the rotor.In addition,the flows at both blade tip and end wall are ameliorated;the combined effect of the two structures weakens shock wave intensity and fluid separation,and reduces the area of low velocity region.Although the interaction between the two structures can provide energy for the low-energy fluid,the mixing of the jet flow and the mainstream flow causes a certain mixing loss and increases the tangential momentum and secondary flow loss to lower the rotor efficiency.

关 键 词：跨音压气机 轴向倾斜缝 端壁抽吸 组合机匣处理 

分 类 号：V235.12[航空宇航科学与技术—航空宇航推进理论与工程]