大展弦比透平叶片弯扭掠复合造型气动性能研究  

Aerodynamic Performance Study of High Aspect Ratio Turbine Blades With Bending-Twisting-Swept Composite Configurations

作　　者：戚乾刚 王乃安[1] 曹培愉 黄典贵[1] QI Qiangang;WANG Naian;CAO Peiyu;HUANG Diangui(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《工程热物理学报》2025年第4期1098-1109,共12页Journal of Engineering Thermophysics

基　　金：上海市科学技术委员会项目(No.22010503100)。

摘　　要：为满足高通流、高载荷燃气轮机透平的设计需求,叶片的气动参数以及叶型沿径向变化会较为剧烈,展弦比随之增大。本文以某300 MW F级重型燃气轮机透平的末级大展弦比叶片作为研究对象,采用正交优化的方法,通过数值模拟的手段分别探究了弯扭、弯掠和扭掠三种复合造型对气动性能的影响。研究结果表明,静叶经过弯扭复合优化后,透平的轮周效率提高了0.3%,最佳静叶中部与顶部安装角增加,且根部呈现明显的正弯形式,有利于根部低能流体向中部迁移,削弱叶栅通道内的二次流强度。静叶经过扭掠复合优化后,透平的轮周效率提高了0.49%,反动度径向分布相比单独扭优化叶片更加均匀,但是透平的通流能力与做功能力大幅下降。相比于弯扭复合优化和扭掠复合优化,静叶弯掠复合优化对透平的气动性能影响相对较弱。研究结果为大展弦比透平叶片设计提供了指导。To meet the design requirements of high-flow and high-load gas turbines,the aerody-namic parameters and blade profiles undergo significant radial variations,accompanied by an increase in the aspect ratio.This study focuses on the last-stage high aspect ratio blades of a 300 MW F-class heavy-duty gas turbine.Utilizing an orthogonal optimization approach,the research investigates the effects of three composite configuration(bending-twisting,bending-sweeping,and twisting-sweeping)on the aerodynamic performance through numerical simulations.The research findings indicate that,following bending-twisting composite optimization of the stator,the total-to-static efficiency of the turbine improves by 0.3%.The optimal setting angles at the mid and top sections of the station-ary blades increase,and the hub exhibits a noticeable positive bending form.This configuration facilitates the migration of low-energy fluid from the root to the mid-section,weakening the sec-ondary flow intensity within the blade passage.After twisting-sweeping composite optimization of the stator,the total-to-static efficiency of the turbine increases by 0.49%.The radial distribution of the reaction degree is more uniform compared to blades optimized solely for twisting.However,the turbine’s mass flow capacity and loading capability experience a significant decrease.In comparison to bending-twisting and twisting-sweeping composite optimizations,the impact of bending-sweeping composite optimization on the aerodynamic performance of the turbine is relatively weaker.The research outcomes provide guidance for the design of high aspect ratio turbine blades.

关 键 词：重型燃气轮机透平 弯扭掠叶片 正交优化 二次流 数值模拟 

分 类 号：TK14[动力工程及工程热物理—热能工程]