附面层抽吸孔对扇形扩压叶栅分离流动控制效果研究  

Study on the Control Effect of the Suction Holes in the Surface Layer on the Separated Flow of the Fan-shaped Diffuser Cascade

作　　者：孙可 陆华伟 郭爽 梁锐星 Ke Sun;Hua-wei Lu;Shuang Guo;Rui-xing Liang(School of Marine Engineering,Dalian Maritime University;School of Energy and Power Engineering,Dalian University of Technology)

机构地区：[1]大连海事大学船舶与海洋工程学院 [2]大连理工大学能源与动力学院

出　　处：《风机技术》2022年第1期1-9,共9页Chinese Journal of Turbomachinery

基　　金：国家自然科学基金面上项目(51676023);轴流跨声速压气机附面层抽吸抑制分离与扩稳的机理探索。

摘　　要：为探究附面层抽吸对跨声速扇形扩压叶栅分离流动控制、气动性能和流场结构的影响,本文基于CFX数值模拟方法对扇形扩压叶栅进行端壁孔抽吸方案研究,并分析叶栅抽吸效果随抽吸流量的变化规律。抽吸位置分布在上下端壁近吸力面端壁处,将弦长四等分为四个不同方案。对比原型及各抽吸孔方案可以得到,当抽吸流量为原型叶栅进口质量流量的0.7%时,最优方案为分离点下游附近的抽吸方案,下端壁单侧抽吸时扇形叶栅总压损失较原型叶栅降低7.83%,静压较原型提高7.86%。同时随着抽吸流量的增加,叶栅流动损失逐渐降低,扩压能力提升。In order to explore the influence of surface layer suction on the separation flow control,aerodynamic performance and flow field structure of the transonic fan-shaped diffuser cascade,the endwall hole suction solution of fan shaped diffuser cascade is simulated by CFX and the change law of cascade suction effect with suction flow is analyzed.The suction position distribute at the upper and lower end wall near the suction surface which quarters the chord length into four different schemes.It can be obtained by comparing the prototype and each suction cases that when the suction flow rate is 0.7%of the inlet mass flow of the prototype cascade,the optimal suction solution is the suction hole near the point downstream of the separation,the total pressure loss is 7.83%lower than the prototype cascade,the static pressure is 7.86%higher than prototype cascade.At the same time,as the suction flow increases,the flow loss of the cascade is gradually reduced,and the expansion capacity is improved.

关 键 词：跨声速静叶叶栅 附面层端壁抽吸 流动损失 角区分离 

分 类 号：TH453[机械工程—机械制造及自动化]