| 汽车外流场DES/RANS模拟研究 |
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| 引用本文： | 杨小龙,林铁平. 汽车外流场DES/RANS模拟研究[J]. 湖南大学学报(自然科学版), 2011, 38(1): 29-34 |
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| 作者姓名： | 杨小龙 林铁平 |
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| 作者单位： | 湖南大学,汽车车身先进设计制造国家重点实验室,湖南,长沙,410082 |
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| 基金项目： | 国家自然科学基金资助项目(10502029); 湖南省自然科学基金资助项目(10JJ3018) |
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| 摘 要： | 汽车外流场具有非定常、大分离和涡结构复杂的特点.采用分离涡模拟(DES)方法对某汽车外流场进行了数值模拟分析,将压力分布、摩擦因数分布、尾部速度和湍动能分布等结果与雷诺平均模拟(RANS)方法进行了比较.计算结果表明:在时均结果上,DES和RANS结果差别不大,但DES方法在处理非定常流动和捕捉含能结构方面优势明显,更...
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| 关 键 词： | 汽车 数值模拟 涡结构 雷诺平均模拟 分离涡模拟 |
DES and RANS of Vehicle External Flow Field |
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| YANG Xiao-long,LIN Tie-ping. DES and RANS of Vehicle External Flow Field[J]. Journal of Hunan University(Naturnal Science), 2011, 38(1): 29-34 |
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| Authors: | YANG Xiao-long LIN Tie-ping |
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| Affiliation: | YANG Xiao-long,LIN Tie-ping(State Key Laboratory of Advanced Design and Manufacture for Vehicle Body,Hunan Univ,Changsha,Hunan 410082,China) |
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| Abstract: | Unsteady,massive separation and complex vortex structures are the typical features of vehicle external flow field.The numerical simulation of the external flow field around a car was carried out by using DES methods.The results such as pressure distribution,skin friction coefficient distribution,velocity and turbulence kinetic energy distribution in the wake were compared with the results by using the RANS methods.It has been indicated that it has few differences between RANS and DES in obtaining the time-a... |
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| Keywords: | car numerical simulation vortex structure Reynolds Averaged Navier-stokes Simulation(RANS) Detached Eddy Simulation(DES) |
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