摘要
采用CFD技术,仿真研究了5种不同来流速度(0.1、0.2、0.4、0.6和0.8 m/s)下金字塔型人工鱼礁(底面边长和高度均为3 m)的三维绕流场。定量获得了上升流最大高度、上升流最大速度、上升流平均速度以及背涡区尺度等流场效应参数;揭示了礁体周围涡量和压力的分布特征,并得到了水动力大小和阻力系数;对比分析了金字塔型鱼礁与方型鱼礁和三棱柱型鱼礁在上升流和背涡流特征量上的差别。
Three - dimensional water flow fields at a pyramid artificial reef with three meters high and three meters long of each side of the base were numerically simulated using CFD approach under the five different incoming velocities （0.1, 0.2, 0.4, 0.6 and 0.8 meter per second respectively）. The maximum upwelling height, the maximum and average velocities of the upwelling current as well as the size of wake vortex region were all obtained quantitatively. The paper revealed the characteristics of distributions of vorticity and pressure around the pyramid reef and obtained the hydrodynamic forces and drag coefficients. Moreover, it compared the discrepancies of pyramid reef with a rectangular reef and a threeprism reef in the quantitative characteristic of upwelling and wake vortex region current.
出处
《水资源与水工程学报》
2013年第5期71-76,共6页
Journal of Water Resources and Water Engineering
基金
上海市教委重点学科建设项目(J50502)
上海市研究生创新基金项目(JWCXSL1102)
关键词
金字塔型鱼礁
上升流
背涡区
分离点
涡量
阻力系数
pyramid reef
upwelling current
wake vortex region
separation point
vorticity
drag coefficient
