离心式叶轮内三维紊流场的数值模拟

NUMERICAL SIMULATION OF THE THREE-DIMENSIONAL TURBULENT FLOW FIELD IN A CENTRIFUGAL IMPELLER

对设计工况下离心压缩机叶轮内三维紊流场进行了数值模拟，数值计算使用加罚有限元方法求解三维、定常、不可压缩、时均Ｎａｖｉｅｒ－Ｓｔｏｋｅｓ方程和Ｋ－ε紊流模型方程，数值计算结果揭示了离心压缩机叶轮出口的射流一尾迹特性和二次流分布规律，本文的研究表明：加罚有限元方法具有预示复杂流场的能力，并且可以大大减小有限元方法的计算工作量。

The steady three-dimensional imcompressible Navier-Stokes equations and K-ε turbu-lence model equations are solved numerically using penalty finite element method to predictthe three-dimensional turbulent flow field in a centrifugal compressor impeller. The numeri-cal results reveal clearly the jet-wake discharge flow character and the secondary flow patternof the centrifugal impeller.