任意入射辐射条件下介质特性对瞬态辐射传递的影响

用基于Monte Carlo法的DRESOR法在平行平板系统内具有吸收、无发射介质中研究不同波形入射、壁面反射、介质散射率、光学厚度、各向异性散射等条件对瞬态辐射传递的影响.任意连续波形入射辐射是目前大多数数值方法很难处理的瞬态辐射问题,而DRESOR法通过在系统内计算一单位入射辐射能对介质的DRESOR数分布,就能计算任意连续波形入射辐射条件下高方向分辨率的瞬态辐射强度结果.DRESOR法和Monte Carlo法计算的结果进行了比较验证,两者吻合较好,证明了DRESOR法处理瞬态入射辐射问题的正确性和有效性.

THE INFLUENCE OF MEDIA CHARACTERISTIC ON TRANSIENT RADIATION FOR SERIAL-PULSE INCIDENT RADIATION

The DRESOR method based on Monte Carlo method was developed to study the inflence of different incident radiation,boundary reflection,scattering albedo,optical thickness and anisotropic scattering on the transient radiative transfer in a one-dimensional slab filled with an absorbing,scat- tering and non-emitting medium.To solving the radiation transfer equation with collimated incident serial-pulse with different shape and width is difficult for most current numerical methods.By the time-dependent DRESOR values,a kind of temporal response of an instantaneous,incident pulse with unit energy and the same directional characteristic as that for the serial-pulse,the temporal radiation intensity inside the medium with high directional resolution can be obtained.To verify the time- dependent DRESOR algorithm used in this study,comparisons among the transient results got by the DRESOR and Monte Carlo methods were made,and good agreements were achieved.