In the model,the fully-nonlinear free surface boundary conditions are satisfied and the semimixed Euler-Lagrange method is used to track free surface;the fourth-order Runge-Kutta method is used to refresh the wave elevation and the velocity potential on the free surface at each time step;the image Green function is used so that the integration on t.
采用半混合欧拉-拉格朗日方法追踪流体瞬时水面,运用四阶Runge-Kutta方法更新下一时间步的波面和速度势,同时应用镜像格林函数消除水槽两个侧面和底面上的积分。
An image Green function is applied to the present model so that two lateral surfaces of an infinite-depth wave tank can be excluded from the calculation domain.
将镜像格林函数应用到无限水深的数值波浪水槽中,以至于两水槽侧壁可以排除于计算域外。
Based on the theory of acoustic measurement of gas temperature and the ideal temperature field distribution in boiler,parabola function is chosen to describe the temperature character on every sonic path.
基于声学测温的基本原理和理想状态下炉内温度场的分布规律,提出了每条声波传播路径上温度的抛物线函数,利用数值计算插值方法中的平方反比法,得出了测量平面上划分的各网格点温度值,从而实现了二维温度场的重建。
