两种湍流模型在风洞拐角流场计算中的应用及比较作者：李启良 杨 帆 杨志刚来源：《计算机辅助工程》2009年第01期视图与投影
摘 要：为降低风洞拐角压力损失，提高其气动性能，使用雷诺应力模型(Reynolds Stress Model，RSM)和k-ε湍流模型对其流场进行数值模拟，分析和比较两种模型在压力损失因数、壁面摩擦损失和二次流损失上的异同，得出：使用两种模型均能发现拐角压力损失因数并不随雷诺数变化而变化；使用RSM得到的压力损失因数与实验值更为接近；相同雷诺数下，使用RSM计算得到的壁面摩擦损失因数比k-ε湍流模型的大，但两种模型得到的壁面摩擦损失因数变化趋势一致；两种模型计算得到的二次流损失随雷诺数变化规律一致，但是在相同雷诺数下，使用k-ε湍流模型计算得到的二次流损失比RSM大. 关键词：风洞拐角；流场；气动性能；雷诺应力模型；k-ε湍流模型
中图分类号：O357.5；TB115；O355
文献标志码：赖继秋朔黄线A
Application and comparison of calculation of two turbulence models on flow field of wind tunnel corner
歼-12 LI Qiliang，YANG Fan，YANG Zhigang
广告投资
(Shanghai Automotive Wind Tunnel Center，Tongji Univ.，Shanghai 201804，China)
Abstract：To reduce pressure loss and improve aerodynamic performance for wind tunnel corner，the numerical simulation of its flow fields is carried out using Reynolds Stress Model(RSM) and k-ε turbulence model. The analysis and comparison on similarities and differences in corner pressure loss factor，loss factor due to wall friction and loss factor due to secondary flow between the two models shows：the corner pressure loss factors of both models are independent of Reynolds number；the corner pressure loss factors obtained by RSM model is closer to the experimental results；the lo
ss factor due to wall friction obtained by RSM model is larger than the one of k-ε turbulence model under the same Reynolds numbers，but the change tendency of both models is same；the rule that loss factors due to secondary flow of both models vary with the change of Reynolds number is uniform，but the loss due to secondary flow obtained by k-ε turbulence model is larger than the one of RSM model under the same Reynolds numbers.市场营销课程设计
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