不同湍流模型数值模拟三维轴对称凸体分离流动的比较  

Numerical Study on Three-dimensional Separated Flow on an Axisymmetric Bump by Different Turbulent Models

作　　者：张群峰[1] 何鸿涛[1] 

机构地区：[1]北京交通大学土建学院,北京100024

出　　处：《科学技术与工程》2009年第13期3693-3697,3703,共6页Science Technology and Engineering

摘　　要：采用基于非结构化网格的有限体积法对三维轴对称凸体分离流动进行了数值模拟。分别采用标准k-ε模型、可实现(Realizable)k-ε模型、低Re数k-ε模型、剪切应力输运(Shear Stress Transport,SST)k-ω模型和低Re数SSTk-ω模型,进行了数值模拟和计算。给出了计算模型、流场网格以及计算结果,并与实验结果进行了对比,结果发现:低Re数k-ε模型模拟效果最佳,与实验结果最为接近。Three-dimensional separated flow on an axisyrmnetric bump is simulated numerically through the finite volume method based on unstructured meshes. Five turbulent models, including standard k-ε model , realizable k-ε model low-Re k-ε model and SST k-ω model with high-Re and low-Re forms, are utilized to solve this problem respectively. The models; grids and calculated results are given and compared with the experimental data. It is shown that turbulent separated flows can be predicted accurately with low-Re k-ε model, which gave the closest resuits from the experiment data.

关 键 词：湍流模型 数值模拟 分离流动 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]