某型增压器混流涡轮流场数值模拟  

Numerical Study About Flow Field of Mixed Flow Turbine Used for Turbocharger

作　　者：房桐毅 田文凯 王澄宇 王焱 

机构地区：[1]大连玉柴涡轮增压技术研发中心有限公司

出　　处：《内燃机与配件》2015年第1期5-9,共5页Internal Combustion Engine & Parts

摘　　要：采用Turbo Grid对某混流涡轮流道进行网格划分,基于有限元的有线体积法对空间进行离散,采用全隐式耦合求解方法,对三维可压缩流雷诺平均N-S方程和标准k-ε湍流方程进行求解,得出设计工况流场流动特性,结合S3流面的二次流线图,分析了通道涡、角涡、顶隙泄漏涡以及尾缘涡随着流动的发展及耗散过程,描述了轮毂和动叶表面流的流动特性和表面流来源,描述了顶隙泄漏流及尾缘径向窜流的产生过程和流动特性,给出了熵值在转子出口处的分布特点,损失产生的主要因素,结合S1流面的参数分布特点,对子午流道设计的合理性进行评价。Meshing flow channel of the mixed flow turbine with Turbo Gird,discredited spatial domain with an element- based finite volume method,based on three- dimensional compressible Reynolds Average N- S Equations and standard k- ε dual equations turbulent flow model,a numerical study of flow field at design point is carried out with the fully implicit coupling solution,combined with the graphs of secondary flow of S3 stream surface,analysis the development and dissipation process of the passage vertex,corner vertex,leakage vertex,tail vertex,described the surface flow feature of the hub and the rotor blade,described the generating and the flow feature of the leakage flow and the trailing edge radical cross flow,then show the entropy graph at the location of the rotor outlet,point out the main factor of the loss,assess the rationality of the meridional channel.

关 键 词：混流涡轮 数值模拟 二次流 表面流 

分 类 号：TK403[动力工程及工程热物理—动力机械及工程]