基于叶片载荷分布的离心叶轮气动优化  

The Aerodynamic Analysis and Optimization of Centrifugal Impeller Performance Affected by Blade Loading

作　　者：刘正先[1] 邢海澎[2] 陈丽英[2] 

机构地区：[1]天津大学机械工程学院力学系,天津300072 [2]天津大学化工学院,天津300072

出　　处：《工程热物理学报》2013年第3期454-457,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51276125);国家重点基础研究发展计划(973计划)资助项目(No.2012CB720101)

摘　　要：针对离心压缩机叶片载荷对叶轮气动性能的影响,按照盘、盖侧的最佳载荷匹配,利用反问题计算原理设计出相应的离心叶轮,采用数值方法计算分析了各自叶型的效率、压比和能量头等气动参数,确定最佳载荷匹配原则。在此基础上对载荷沿流向的梯度变化进行再优化,发现在一定程度内较小的载荷梯度有利于减小流动损失,提高叶轮效率,但过于平缓的载荷反而使性能略有降低。本文结果为高性能离心叶轮的气动设计提供依据。To estimate the blade loading effect on the impeller performance in centrifugal compressor, the inverse design method was used to get the geometry parameters of centrifugal impeller based on the optimum matching rule of blade loading on the hub and shroud sides. The aerodynamic parameters of efficiency, pressure ratio and energy head of impeller were calculated and analyzed by numerical method, and the optimum blade loading matching principle was validated. Then, the gradient of blade loading along streamwise was further discussed. It was found that the smaller gra- dient of blade loading would lead to less flow loss and higher impeller efficiency in some way, however very small gradient of blade loading would result in slight decreasing of performance. The results are hoped to be able to provide support to aerodynamic design of high-efficiency centrifugal compressor impeller.

关 键 词：离心叶轮 反问题 载荷分布 气动性能 数值分析 

分 类 号：TH45[机械工程—机械制造及自动化]