湍流边界层拟序结构的大涡模拟研究

工程热物理学报 , 2004, 25(4): 579-581.

1.北京航空航天大学能源与动力工程学院,北京,100083

2.北京航空航天大学能源与动力工程学院,北京,100083

3.北京航空航天大学能源与动力工程学院,北京,100083

基金项目: 国家自然科学基金(50206001)

LES OF COHERENT STRUCTURE IN TURBULENCE BOUNDARY LAYER

采用动力亚格子模型,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.从瞬时速度和脉动速度场、脉动速度相关、均方根脉动涡量分布、以及瞬时涡量场等多个方面,对湍流边界层流动的拟序结构进行了分析,包括近壁区小尺度湍流结构和瞬态过程,如条纹结构、喷射和扫掠过程、以及近壁旋涡结构等.

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