不同形状吸力面翼刀对叶栅二次流及性能的影响  

Effects of Suction Surface Fences With Different Profiles on Secondary Flow and Performance of Compressor Cascade

作　　者：杨凌 陈韵之 钟兢军 YANG Ling;CHEN Yun-Zhi;ZHONG Jing-Jun(Department of Marine Engineering,Dalian Maritime University,Dalian 116026,China;Merchant Marine College,Shanghai Maritime University,Shanghai 201306,China)

机构地区：[1]上海海事大学商船学院,上海201306 [2]大连海事大学轮轮机工程学院,大连116026

出　　处：《工程热物理学报》2022年第1期50-57,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51436002,No.51506020)。

摘　　要：本文以高负荷扩压平面叶栅为研究对象,基于雷诺时均方法进行定常数值计算,探讨吸力面翼刀侧面形状对吸力面二次流结构及气动性能的影响。吸力面翼刀位于25%叶高、33.3%∼100%叶片弦长处,侧面形状分别为圆弧形以及倒圆角后的三角形和长方形,与叶片连接处采用融合过渡设计。在-3°,0°和3°三个工况下的分析结果表明:侧面形状对二次流阻断效果有影响,侧面积越大的吸力面翼刀越有效:本文最佳侧面形状为长方形。在-3°和0°下,翼刀能削弱吸力面二次流,提升当地叶片负荷。在性能方面,翼刀主要降低叶型损失,但会附加一定的摩擦损失。长方形翼刀在-3°和0°攻角下均使能量损失系数降低0.7%,同时提升气流折转能力和压比。在3°冲角下,翼刀失效,叶栅损失升高。In order to investigate the effect of Suction Surface Fences(SSF)with different side profiles on the secondary flow and performance of the high-load compressor linear cascade,Reynoldsaverage method was employed to solve the steady compressible RANS equations.Three SSF(arc,rounded triangle and rounded rectangle)are located on the 25%blade height and 33.3%∼100%blade chord,which are sharped on the top and designed as the blended SSF and blade.The simulation results under−3°,0°and 3°show that the area of the side profile plays an important role in the control effect on secondary flow.The rounded rectangle case has an influence priority.At the attack angle of-3°and 0°,SSF weaken the secondary flow on blade suction surface as well as increase the local blade load.For the aerodynamic performance,SSF mainly decrease the profile loss of blade despite causing a less frictional loss.The rectangle SSF reduces the energy loss coefficient by 0.7%and improve the flow angle and pressure rise.At the 3°incidence,SSF are invalid so that the loss is increased.

关 键 词：吸力面翼刀 高负荷扩压叶栅 二次流 角区分离 损失 

分 类 号：O351[理学—流体力学]