风波非线性相互作用数值模拟  

Numerical Simulation of Nonlinear Interaction between Wind and Waves

作　　者：程展[1] 张兆顺[1] 

机构地区：[1]清华大学工程力学系

出　　处：《水动力学研究与进展（A辑）》1989年第3期29-36,共8页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金重大项目"海洋工程中力学问题"资助

摘　　要：一、引言 风波的预测在海洋学和海洋工程中都具有重要意义。除不同波长水波之间的非线性相互作用以外,正确地计算风输运给波的能量(海洋波浪能量的主要来源)在波浪谱的预测中起着关键的作用。以前的研究工作者在计算风输运给波的能量,即计算风波增长率方面做了一些工作,然而只取得了部分的成功。Phillips(1957)、Miles(1957)及Valenzuela(1976)等用线化模型进行计算,得到的能量增长率都小于实测值。Gent和Taylor(1976,1977)假设水波为无旋流、风为湍流剪切流并用一方程模式计算雷诺应力,在计算风波非线性效应方面取得了一定进展。近年来随着计算流体动力学及湍流模式理论的发展,在引入适当的界面条件下,我们可以把风波问题视为统一的湍流流场进行计算。The nonlinear interaction between turbulent wind and regular waves is investigated in the paper by use of phase-average Navier-Stokes equation. The Reynolds stress is closed by k-ε model and the equation is solved numerically by the finite volume scheme. The major contribution of the paper is to include the turbulent momentum transfer at the interface between wind ana waves into the computation, which is neglected by previous investigators. The calculated wind wave field is fairly reasonable, particularly the prediction of the growth rates of wind waves is greatly improved in comparison with previous results. Our investigation indicates that the turbulent transfer at the boundary plays a significant role in the wind wave generation.

关 键 词：风 波 非线性 数值模拟 波浪水力学 

分 类 号：TV139.221[水利工程—水力学及河流动力学]