基于浸入式边界方法的运动物体声辐射数值模拟

Numerical simulation of sound radiation from moving bodies based on immersed boundary method

为了在声学计算中简化网格的处理,从而发展出适用于运动复杂边界问题模拟的计算格式,基于浸入式边界方法,提出了一种适用于无黏流动、无穿透边界条件的处理方法,并对一些简单的运动物体声辐射问题进行了数值模拟.数值结果与解析解得到了令人满意的对比,初步验证了所提出的研究方案的可行性.

To simplify the grid generation procedure in aeroacoustic problem simulation and develop a computational scheme suitable for moving complex geometries,a strategy of guaranteeing the impermeable boundary condition based on the immersed boundary（IB） method was proposed in the paper.Simulations of sound radiation from moving bodies were performed with relatively simple motion.Satisfactory comparison was conducted between present computational data and theoretical solutions,verifying the feasibility of the present method.