Compressibility effects in turbulent boundary layers
Compressibility effects in turbulent boundary layers
复制标题
湍流边界层中的压缩性效应
DOI：
10.1088/0256-307x/25/9/059
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发表时间：
2008-09
影响因子：
3.5
通讯作者：
She Zhen-Su
中科院分区：
文献类型：
--
作者：
Pei Jie;Chen Jun;Cao Yu-Hui;She Zhen-Su
本文采用局部级联（LC）格式和时空关联方法，研究了Ma = 0.8和1.3时可压缩边界层近壁区的湍流结构及其对流特性。通过统计分析LC结构的尺度相关系综，研究了脉动速度分量u（流向）和v（垂直）的对流速度。结果表明，u是对流与熵扰动，而v与等熵过程。在超声速弓形流中，在壁面附近（y+ ≥ 1）发现了一个不同于常规粘性亚层的异常薄层。而在1 < y+ < 30的区域内，速度、密度和温度脉动以流向条纹为主，垂直速度和密度脉动以展向条纹为主，压力和密度脉动强相关。LC格式被证明可以有效地研究超声速流动的本质和可压缩性对壁面运动的影响。
Local cascade (LC) scheme and space-time correlations are used to study turbulent structures and their convection behaviour in the near-wall region of compressible boundary layers at Ma = 0.8 and 1.3. The convection velocities of fluctuating velocity components u (streamwise) and v (vertical) are investigated by statistically analysing scale-dependent ensembles of LC structures. The results suggest that u is convected with entropy perturbations while v with an isentropic process. An abnormal thin layer distinct from the conventional viscous sub-layer is discovered in the immediate vicinity of the wall (y+ ≥ 1) in supersonic Bows. While in the region 1 < y+ < 30, streamwise streaks dominate velocity, density and temperature fluctuations, the abnormal thin layer is dominated by spanwise streaks in vertical velocity and density fluctuations, where pressure and density fluctuations are strongly correlated. The LC scheme is proven to be effective in studying the nature of supersonic flows and compressibility effects on wall-bounded motions.
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影响因子：
3.7
作者：
-J.;-A.;-B.
通讯作者：
-J.;-A.;-B.
影响因子：
4.6
作者：
Chang Xu;Zhengjun Zhang;D. Toonder;F. Nieuwstadt
通讯作者：
Chang Xu;Zhengjun Zhang;D. Toonder;F. Nieuwstadt
影响因子：
3.7
作者：
K. Zaman;A. Hussain
通讯作者：
K. Zaman;A. Hussain
影响因子：
3.5
作者：
Hu Kai-heng;C. Kai
通讯作者：
Hu Kai-heng;C. Kai
DOI：
10.1063/1.858653
发表时间：
1993-03-01
期刊：
PHYSICS OF FLUIDS A-FLUID DYNAMICS
影响因子：
--
作者：
KIM, J;HUSSAIN, F
通讯作者：
HUSSAIN, F