| 摘要: |
| 利用大涡模拟方法模拟了雷诺数为13000的充分发展槽道湍流流动。为了比较网格和亚格子模型对计算结果的影响,采用了三种不同的网格数目,以及Smagorinsky模型和动力模型等两种亚格子模型,并与直接数值模拟结果进行了比较。结果表明,大涡模拟可以比较准确地给出速度分布、脉动速度均方根分布等湍流统计参数。在此基础上,对近壁区小尺度湍流结构进行了研究。 |
| 关键词: 大涡模拟+ 通道 湍流 |
| DOI： |
| 分类号:V211.4 |
| 基金项目:国家自然科学基金资助项目 (50 2 0 60 0 1 ) |
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| Large-eddy simulation of 3D turbulence in the channel |
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Eriqitai, ZOU Zheng-ping, WANG Qiang
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School of Jet Propulsion, Beijing Univ. of Aeronautics and Astronautics, Beijing 100083, China
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| Abstract: |
| Large-eddy simulations was employed to simulate the full-developed turbulence in channel which Reynolds number is 13000. In order to compare the effects of grid number and sub-grid model on the simulated results, three different grid numbers and two sub-grid models are used in the simulations. The results show that the statistical parameters such as velocity and RMS of velocity can be simulated accurately by Large-eddy simulations. On the basis of this, this paper studied the small-scale coherent structures near the wall. |
| Key words: Large-eddy simulations~+ Channel Turbulent flow |
