叶片数及分流叶片位置对压气机性能的影响  

EFFECT OF BLADE NUMBER AND SPLITTER BLADE POSITION ON THE PERFORMANCE CHARACTERISTIC OF THE COMPRESSOR

作　　者：刘瑞韬[1] 徐忠[1] 

机构地区：[1]西安交通大学能动学院流体机械研究所,陕西西安710049

出　　处：《工程热物理学报》2004年第2期223-225,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.59876028)

摘　　要：应用三维粘性计算程序对存在叶顶间隙泄漏时带分流叶片的离心压气机内部流动进行了数值模拟,重点分析了叶片数及分流叶片处于不同位置对压气机级内三维粘性流场及级性能的影响。计算中采用中心差分格式结合B-L代数模型使用时间推进法求解雷诺平均N—S方程。计算结果表明:叶片数增加,叶轮进口阻塞增加,压气机性能下降,但可有效降低叶轮单个叶片的载荷。分流叶片位于不同位置时,应用IBSA叶轮的压气机效率最高,压气机性能最好。The time marching method is used to solve the control equations and a computational analysis of the flow field in a centrifugal compressor with the tip leakage is presented. Emphasis is focused on the effect of the blade number and splitter blade position on the flow and characteristics of the stage. The numerical analysis is carried out using 3-D N-S codes with the B-L algebraic turbulence model for closure. The calculations are performed with a central space discrimination scheme, with second and fourth order artificial dissipation terms. Numerical results show the stage characteristic becomes worse and the load of the blade reduces increasing the blade number. The efficiency is highest when the position of splitter blade is close to PS of the long blade (IBSA).

关 键 词：叶片数 分流叶片 数值分析 离心压气机 

分 类 号：TH452[机械工程—机械制造及自动化] O35[理学—流体力学]