三维槽道湍流的大涡模拟

推进技术 ›› 2004, Vol. 25 ›› Issue (1): 23-26.

三维槽道湍流的大涡模拟

额日其太,邹正平,王强

北京航空航天大学能源与动力工程学院北京100083;北京航空航天大学能源与动力工程学院北京100083;北京航空航天大学能源与动力工程学院北京100083

发布日期:2021-08-15
基金资助:
国家自然科学基金资助项目 (50 2 0 60 0 1 )

Large-eddy simulation of 3D turbulence in the channel

School of Jet Propulsion, Beijing Univ. of Aeronautics and Astronautics, Beijing 100083, China;School of Jet Propulsion, Beijing Univ. of Aeronautics and Astronautics, Beijing 100083, China;School of Jet Propulsion, Beijing Univ. of Aeronautics and Astronautics, Beijing 100083, China

Published:2021-08-15

摘要/Abstract

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

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

额日其太,邹正平,王强. 三维槽道湍流的大涡模拟[J]. 推进技术, 2004, 25(1): 23-26.