期刊名称：Current Journal of Applied Science and Technology
印刷版ISSN：2457-1024
出版年度：2013
卷号：4
期号：3
页码：477-491
语种：English
出版社：Sciencedomain International
摘要：This study investigates experimentally the effect of jet injection on the flow structure around a pier-scour hole. Experiments are conducted with 1-jet, 3-jets and without jet injection under clear-water scour conditions. The results show that the jet(s) alter(s) the turbulent characteristics and vertical component of the velocity, causing a reduction of the strength of the down flow. A quadrant analysis for the Reynolds shear stress values reveals that the sweeps and ejections have the main contributions on the Reynolds shear stress production in the near-bed flow. The third-order correlations of velocity fluctuations show an obvious distinction for the jet injection experiments in comparison to that without injections, especially inside the scour hole.
