A refinement of scaling laws in wall turbulence  

作　　者：张珂 

机构地区：[1]School of Civil Engineering and Mechanics, Huazhong University of Science and Technology

出　　处：《Journal of Chongqing University》2009年第3期195-200,共6页重庆大学学报（英文版）

基　　金：Funded by the Natural Science Foundation of China (No. 10372033)

摘　　要：As a universal conclusion of turbulent scale, scaling laws are important to the research on statistic turbulence. We measured two-dimensional instantaneous velocity field in turbulent boundary layers of flat plate with the momentum thickness Reynolds number Reθ=2 167. Scaling laws have different forms in different wall distance and scale. We proposed an expected scaling law and compared it with the She-Leveque (SL) scaling law based on the wavelet analysis and traditional statistical methods. Results show that the closer to the wall, the more the expected scaling law approached to the SL scaling law.As a universal conclusion of turbulent scale, scaling laws are important to the research on statistic turbulence. We measured two-dimensional instantaneous velocity field in turbulent boundary layers of flat plate with the momentum thickness Reynolds number Reθ=2 167. Scaling laws have different forms in different wall distance and scale. We proposed an expected scaling law and compared it with the She-Leveque （SL） scaling law based on the wavelet analysis and traditional statistical methods. Results show that the closer to the wall, the more the expected scaling law approached to the SL scaling law.

关 键 词：turbulent boundary layer probability density function particle image velocimetry scaling laws 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]