压气机大弯角串列叶栅多目标优化设计  

Multi-objective Optimization Design of High-turning Tandem Cascade in Compressor

作　　者：李天恩 耿少娟[1,2] 刘帅鹏 张宏武 LI Tianen;GENG Shaojuan;LIU Shuaipeng;ZHANG Hongwu(Advanced Gas Turbine Laboratory,Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing,China,Post Code:100190;University of Chinese Academy of Sciences,Beijing,China,Post Code:100049)

机构地区：[1]中国科学院工程热物理研究所先进燃气轮机实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《热能动力工程》2024年第11期1-11,共11页Journal of Engineering for Thermal Energy and Power

基　　金：国家科技重大专项(2017-Ⅱ-0007-0021,2017-Ⅱ-0006-0020)。

摘　　要：为开展串列叶栅优化设计,使用基于中弧线叠加厚度分布的串列叶栅参数化造型方法,搭建了基于Kriging代理模型和NSGA-Ⅱ优化算法的串列叶栅多目标优化设计平台。以某多级轴流压气机末级静叶中截面54.15°大弯角叶型为原型,开展了串列叶栅改型和多目标优化设计,并分析了串列叶栅几何参数的敏感性。分析结果表明:前排叶型安装角、轴向重叠度、周向节距和弯角比4个参数对串列叶栅气动性能影响最显著;与原型单列叶栅相比,优化串列叶栅轴向长度缩短,相同冲角下总压损失降低、静压比提高,可用冲角范围拓宽33.3%,在-12°,-2°和4°冲角下总压损失分别降低39.1%,3.3%和11.9%;优化串列叶栅前排叶型负荷降低、后排叶型负荷增大,合理的缝隙结构可以削弱/抑制边界层分离,在全冲角范围内提升叶栅气动性能。In order to carry out the optimization design of tandem cascade,the parametric modeling method of tandem cascade based on superimposing thickness on camber line was developed,and the multi-objective optimization design platform of tandem cascade based on Kriging surrogate model and NSGA-Ⅱoptimization algorithm was constructed.The high-turning blade profile with camber angle of 54.15°from the mid span of the last stage stator of a multi-stage axial compressor was taken as the prototype to perform the retrofit and multi-objective optimization design of tandem cascade.The sensitivity of geometric parameters of tandem cascade was analyzed.Results show that the stagger angle of forward airfoil,axial overlap,circumferential percent pitch and camber angle ratio have the most significant influence on the aerodynamic performance of tandem cascade.Comparing with the prototype single-row cascade,the axial length of the optimized tandem cascade is shorter.The total pressure loss coefficient of the optimized tandem cascade is smaller and the static pressure ratio is larger than those of the prototype cascade at the same incidence angle.The available incidence angle range of the optimized tandem cascade is increased by 33.3%,and the total pressure loss coefficients are decreased by 39.1%,3.3%and 11.9%at incidence angles of-12°,-2°and 4°respectively.For the optimized tandem cascade,the load of forward airfoil is decreased and the load of aft airfoil is increased,the reasonable gap shape can weaken or suppress the boundary layer separation,thus the aerodynamic performance within the full incidence range is increased.

关 键 词：轴流压气机 末级静叶 串列叶栅 多目标优化 代理模型 敏感性分析 

分 类 号：U664.13[交通运输工程—船舶及航道工程]