非轴造型对涡轮损失控制的攻角适应性研究  

Incidence Angle Adaptability Investigation of Non-Axisymmetric Endwall Contouring on Turbine Loss Control

作　　者：杜政帅 蔡乐[1] 陈英杰 王松涛[1] DU Zhengshuai;CAI Le;CHEN Yingjie;WANG Songtao(School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150001

出　　处：《工程热物理学报》2024年第10期3049-3057,共9页Journal of Engineering Thermophysics

基　　金：国家科技重大专项(No.J2019-II-0021-0042)。

摘　　要：非轴对称端壁技术能够有效减小横向二次流带来的气动损失,提升涡轮效率。为了评估不同来流条件下非轴造型在涡轮叶栅中的作用效果,以高压涡轮的静叶叶栅上端壁为研究对象。在0°攻角条件下以涡轮的出口总压损失为优化目标进行了叶栅非轴对称端壁的造型和优化,研究得到了一种能够有效减小叶栅二次流动能和气动损失的非轴造型,并在变攻角情况下对该造型的损失控制效果进行了分析。结果表明:在所考察的攻角范围内,本研究使用的非轴对称端壁造型均能有效降低叶栅气动损失,且该造型对几个主要的二次流结构的作用效果在不同攻角下没有太大的变化;在二次流强度较弱的负攻角条件下,造型对马蹄涡结构的控制效果相比于其他攻角条件更为显著。The non-axisymmetric endwall technology can effectively reduce the aerodynamic loss caused by circumferential secondary flow and improve the turbine efficiency.In order to evaluate the effect of endwall contouring in the turbine cascade under different incidence angles,the shroud of the stator cascade of a high-pressure turbine is taken as the object of study.The contouring and optimization of the non-axisymmetric endwall was carried out with the total pressure loss of the turbine outlet as the optimization objective under the condition of 0◦incidence angle,and the study obtained a kind of contoured endwall which is able to effectively reduce the secondary kinetic energy and the aerodynamic loss of the cascade.The loss control effect of this endwall was analyzed under the condition of varying incidence angles.The results show that the non-axisymmetric endwall contouring used in this study can effectively reduce the aerodynamic loss of the cascade in the range of incidence angles investigated,and the effect of the contouring on several major secondary flow structures does not change much in these conditions;in the negative incidence angle conditions where the secondary flow strength is weaker than in other incidence angle conditions,the contouring has a more significant effect on the horseshoe vortex structure.

关 键 词：涡轮静叶 二次流控制 端壁造型 变攻角 样条曲面 

分 类 号：TK14[动力工程及工程热物理—热能工程]