复合随机介质中的波束传播

Wave Beam Propagation in Composite Random Medium

本文从辐射传输方程出发讨论了波束在复合随机介质中的传播问题。将波束强度分解成相干强度、前向小角度非相干强度和漫射非相干强度三部分,导出它们所满足的方程。并分别用付里叶变换法和漫射近似法求出各方程的解。在忽略介质中湍流和粒子间的互相关对波散射的影响的情况下,对波束强度的各部分进行了计算;最后对数值结果进行了分析和总结。

The problem of wave beam propagation in composite random medium has been studied in this paper on the basis of radiafive transfer equation.The wave intensity is divided into three parts:coherent intensity,forward scattering incoherent intensity and diffuse incoherent intensity.The corresponding equations are derived and solved by using Fourier transformation and diffusion approximation.The wave beam intensities are also calculated in the case of neglecting the effects of the mutual correlation of turbulence and particles in the medium.The numerical results are analysed and summarized at last.