不同湍流模型在离心压缩机叶轮内流场数值模拟中的比较研究

Comparison of Different Turbulence Models for Numerical Simulation of Internal Flow of Centrifugal Compressor

以SIMPLEC算法为基础,运用3个湍流模型(标准k-ε模型、RNG k-ε模型、realizable k-ε模型)模拟了离心压缩机叶轮内部湍流流动,考查了不同湍流模型在计算叶轮机械内部分离流动时的性能。数值实践表明,RNG模型性能最优,应优先考虑使用RNG模型进行叶轮机械内流模拟。

Based on SIMPLEC algorithm,the turbulent flow in the vane channel of centrifugal compressor is numerically simulated using three turbulence models（Standard k-ε model,RNG k-ε model,realizable k-ε model） for the purpose of examining different turbulence models＇ performance on simulation of internal separated flows of turbo machinery.Numerical experiments show that,RNG model shows superior performance and should be a preference for simulating the internal flows of turbo machinery.