基于速比优化的三维透平叶片一维化设计方法  

One-Dimensional Design Method for Three-Dimensional Turbine Based on Radial Speed Ratio Optimization

作　　者：戚乾刚 杨欢 王乃安[1] 黄典贵[1] QI Qiangang;YANG Huan;WANG Naian;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》2024年第3期715-724,共10页Journal of Engineering Thermophysics

基　　金：国家科技重大专项(No.J2019-II-0010-0030);上海市科学技术委员会(No.22010503100)。

摘　　要：现代透平叶片设计过程中,需要不断调整沿径向分布的几何参数,设计周期长。为了解决此问题,本文构建了一种三维叶片的一维化设计方法:将叶片流道沿径向分割成若干个子流道,对每个子流道进行一维设计,得到其最佳速比与进出口几何角,再使用每个子流道的一维设计结果沿径向叠加构建三维叶片。使用某F级燃机末级的边界条件,应用该方法对其叶片进行重新设计,并利用数值模拟结果中的静叶出口压力、落后角等参数作为额外约束进行精细设计。结果表明:与原始设计相比,优化得到的透平动叶部分区域损失略微增大,流量降低0.26%,但余速损失显著下降,同时轮周效率提高了1.7%,总–总效率提高0.37%,并且轴功增大了1.47%。In the design process of modern turbine blades,the geometric parameters along the radial distribution need to be constantly adjusted,and the design cycle is long.In order to solve this problem,this paper constructs a one-dimensional design method of three-dimensional blade:the blade flow channel is divided into several sub-flow channels along the radial direction,and each sub-flow channel is designed in one dimension to obtain its optimal speed ratio and geometric angle.Then,the one-dimensional design results of each sub-flow channel are superimposed along the radial direction to construct a three-dimensional blade.Using the boundary conditions of the last stage of an F-class gas turbine,the blade is redesigned by this method,and the parameters such as the static blade outlet pressure and the backward angle in the numerical simulation results are used as additional constraints for fine design.The results show that compared with the original design,the optimized turbine has a slight increase in the loss in some areas of the rotor,the flow rate is reduced by 0.26%,but the outlet kinetic energy loss is significantly reduced.At the same time,the wheel efficiency is increased by 1.7%,the total-to-total efficiency is increased by 0.37%,and the shaft work is increased by 1.47%.

关 键 词：轴流透平 速比 气动设计 参数化方法 三维设计 

分 类 号：TK14[动力工程及工程热物理—热能工程]