摘要
进口瞬态湍流波动条件直接影响大涡模拟的精度。在亚音速平板湍流边界层上研究并验证更适合工程应用的进气道湍流产生技术。采用涡旋识别方法和数值纹影图研究边界层相关结构的变化特征,发现相干涡旋整体结构基本较短,呈现出马蹄形涡旋或涡旋环,平均速度分布遵循线性律、对数律和尾迹律等经典壁面律。
As inlet transient turbulence fluctuation conditions directly affect the accuracy of large eddy simulation,the inlet turbulence generation technology more suitable for engineering application is studied and verified on the subsonic flat plate turbulent boundary layer.Vortex recognition method and numerical schlieren graph are used to study the variation characteristics of related structures in boundary layer.The overall structure of the coherent vortex,found to be basically short,presents a horseshoe-shaped vortex or vortex ring with average velocity distribution in line with classic wall laws such as linear rate,logarithmic law,and wake rate.
作者
刘俊杰
仲冬冬
葛宁
LIU Junjie;ZHONG Dongdong;GE Ning(College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《机械制造与自动化》
2021年第6期155-157,185,共4页
Machine Building & Automation
关键词
进口瞬态湍流
大涡模拟
涡旋识别方法
inlet transient turbulence
large eddy simulation
vortex identification method
