弯曲设计在涡轮一体化过渡段中的气动效果分析  

Aerodynamic Analysis of Blade Bowing Design in an Integrated Inter-turbine Duct

作　　者：姜睿琦 罗磊[1] 闫晗 杜巍[1] Rui-qi Jiang;Lei Luo;Han Yan;Wei Du(School of Energy Science and Engineering,Harbin Institute of Technology)

机构地区：[1]哈尔滨工业大学能源科学与工程学院

出　　处：《风机技术》2024年第4期24-29,共6页Chinese Journal of Turbomachinery

摘　　要：为提升某对转涡轮过渡段性能,并研究叶片弯曲技术在过渡段中的气动效果,对某一体化设计涡轮过渡段进行数值模拟。对过渡段内支板及气动导向叶片进行弯曲设计,控制弯曲叶高50%,设计正弯、反弯、J型、反J型四种弯曲形式,弯角变化范围10°~20°,通过对比分析不同的叶片弯曲方案,初步探讨叶片弯曲在一体化过渡段内控制二次流动、减小损失的机理。结果表明:过渡段中主要损失区域集中在支板和气动导向叶片吸力面尾缘角区,采用J型设计能够有效改善叶片表面压力分布,大幅缩小高损失区范围,优化主流流动,20°弯角J型设计能够使通道内能量损失系数相对降低7.4%,对控制一体化过渡段流场内二次流动起到改善效果。A numerical simulation was carried out to improve the performance of a counter-rotating turbine and study the influence of blade-bowing design based on an integrated inter-turbine duct(ITD).The struct and aero vanes were bowing designed,the bowing blade height was controlled at 50%constant.Positive bowing,reverse bowing,J type bowing and reverse J type bowing were designed and the blade bowing angle was varied from 10°to 20°in this study.Through a comparative analysis of schemes with various bowing laws,the mechanism of controlling the secondary flow and reducing loss was initially discussed.The results show that the main loss area in IITD is concentered at the suction-endwall corner of the struct and aero vanes.The J type bowing design effectively improves the pressure distribution on the blade surface,significantly reduces the high loss area and optimizes the mainstream flow.The J type bowing design with 20°bowing angle reduces the energy loss coefficient in ITD by 7.4%,relatively,which significantly improves the control of secondary flow in the IITD flow field.

关 键 词：一体化过渡段 支板叶片 气动导向叶片 J型叶片 二次流动 气动性能 

分 类 号：TK14[动力工程及工程热物理—热能工程]