吸力面翼刀在高速压气机叶栅内的应用初探  

Preliminary Investigation of Suction Surface Fence in High-speed Compressor Cascade

作　　者：陈韵之 杨凌 钟兢军 杨国刚[1] Yun-zhi Chen;Ling Yang;Jing-jun Zhong;Guo-gang Yang(Department of Marine Engineering,Dalian Maritime University;Merchant Marine College,Shanghai Maritime University)

机构地区：[1]大连海事大学轮机工程学院 [2]上海海事大学商船学院

出　　处：《风机技术》2020年第2期1-8,共8页Chinese Journal of Turbomachinery

基　　金：国家自然科学基金资助项目(51506020、51436002)。

摘　　要：采用雷诺时均方法的定常数值计算,分析了三种侧面形状(圆弧、三角形和长方形)吸力面翼刀对高速扩压平面叶栅性能及流动分离的影响。翼刀位于吸力面上25%叶高、33.3%~100%叶片弦长处,将翼刀的尖角以及根部进行倒圆处理以减少附加损失,在-3°,0°和3°三个攻角下研究流动控制效果。结果表明:三种方案均能在-3°和0°攻角下有效提升叶片后部负荷,降低角区分离的尺寸,缩小35%~50%叶高区域的叶型损失。吸力面翼刀上表面诱导翼刀涡削弱附面层,下表面能阻断二次流的展向迁移,但在20%~30%叶高范围内产生附加损失。本文最佳翼刀方案为长方形,在-3°和0°攻角下能使能量损失系数降低0.7%,气流角分别提升0.3%和0.4%。The performance of the Suction Surface Fences(SSF), whose geometrical forms are separately based on the arc,triangle and rectangle, was studied in a high-speed axial flow compressor cascade by solving the steady compressible RANS equations. All the SSF cases have equal locations relative to the blade geometry: on the 25% blade height and 33.3%~100%blade chord. The sharp corners and roots of SSF are rounded to reduce the additional loss. The numerical results of the baseline and the SSF cases under three inlet incidence angles(-3°,0° and 3°) show that: The SSF works by inducing fence vortex on its upper face and blocking secondary flow from the blade boot to top, resulting in a restraint of boundary flow separation on suction surface. However, the additional loss of SSF increases the cascade loss in the 20%~30% blade height,which is greater than its positive effect and finally worsens the flow condition at 3°. To sum up, the case of the rectangle has the best impact on improving the total cascade performance at-3°and 0°: the energy loss coefficient is both reduced by 0.7%,and the flow angle is improved by 0.3% and 0.4%, respectively.

关 键 词：压气机 被动控制 吸力面翼刀 二次流 角区分离 

分 类 号：TH453[机械工程—机械制造及自动化] TK05[动力工程及工程热物理]