摘要
该文基于雷诺平均N-S方程,结合RNG k-?方程建立黏性数值波浪水槽,对不同体力加速度条件下规则波的消波问题进行研究。文中提出了三种描述消波区内部阻尼变化的阻尼函数,并对其适用性进行研究。研究结果表明,阻尼函数1线性阻尼增长模式在小波陡情况下优势明显,然而随着波陡增加其前段阻尼增速过快带来的影响不可忽略;阻尼函数2、3非线性阻尼增长模式则相反。采用同种阻尼函数时不同体力加速度条件下反射系数基本相同,阻尼系数可取为N×103。考虑波浪水槽尺寸,超重环境下三到四级海况的水波实验宜采用1/25至1/50的缩尺比完成;而极端海况的模拟则需采用更小的缩尺比完成。
In this paper, the Reynolds averaged N-S equations and RNG k-？ equations are solved for establishing the viscous numerical wave tanks. The problem of damping absorption in Ng force field is studied in the viscous numerical wave tanks. Three damping functions for describing the variation of the damping in damping zone are presented and studied. The results show that for the case with small wave steepness, the damping function 1 with the linear increasing of damping has a clear advantage. However, with the increase of wave steepness the influence of too fast growth rate of damping, at the front of the damping zone, can not be neglected. And the damping function 2 and 3 with the nonlinear increasing of damping have the opposite quality. The damping coefficient can be set to N×103 in Ng force field when the same damping function the reflection coefficients are basically similar in different accelerations of body force. The scale considered in hypergravity field is from1/25 to 1/50 at the sea state level about 3~4 for the limitation of the dimensions of the wave tank. And the smaller scale should be considered for the simulation of the extreme sea state.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2017年第6期688-695,共8页
Chinese Journal of Hydrodynamics
关键词
超重环境
阻尼消波
多孔介质
数值波浪水槽
摇板造波法
hypergravity field
damping absorption
porous media
numerical wave tank
flap-type wavemaker
作者简介
王巧莎（1989-），女，河南漯河人，博士研究生．Email：wqs_20@163．com.;通讯作者：李明海，Email：Limh@caep．cn
