摘要
采用Realizable kε湍流模型,结合多孔介质模型模拟网衣,建立了模拟水流作用下平面网衣周围流场的三维数值模型。利用最小二乘法分析作用在平面网衣上的水流力与流速和冲角的关系,得到对应的多孔介质系数,使得多孔介质区域具有与网衣相同的阻水效果。运用该数值模型模拟了水流作用下平面网衣周围的流场,并与物理模型试验结果进行了比较。比较结果表明,不同流速和冲角条件下计算和试验获得的网衣周围流速值一致。证明了该数学模型对模拟网衣周围流场的适用性。
A three-dimensional numerical model combined the Realizable k-ε turbulence model and the porous media model is established to simulate the flow field around a fishing net under current. The unknown porous coefficients are determined from the experimental forces on the net and flow velocities and the angles of attack using the least square method. Therefore, the porous media act the same water-blocking effect as the net. This numerical model is applied for the simulation of the flow field around the net panel under current and the numerical results are compared with the data obtained by physical model tests. The comparison shows that the velocity data with various flow velocities and angles of attack. the flow field around a fishing net. magnitude of the numerical simulation agrees well with the experimental It is indicated that this numerical model is applicable for the simulation of
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2011年第5期606-613,共8页
Chinese Journal of Hydrodynamics
基金
国家自然科学基金(50809014)
国家海洋"863"计划(2006AA100301)
高等学校博士学科点专项科研基金(200801411094)
国家自然科学基金创新群体(50921001)
关键词
网衣
流速衰减
多孔介质模型
数值模拟
fishing net
velocity reduction
porous media model
numerical simulation
