【摘要】 高方向辐射强度信息对一些逆问题非常有帮助,例如,在工业炉中用辐射成像技术重建二维/三维温度场.DRESOR法被发展用来在二维矩形各向同性/异性散射介质中求解辐射传递方程。用DRESOR法可以在矩形区域边界处可以计算得到辐射强度在半球立体角空间内6658个方向上的分布。用DRESOR法计算得到的无维辐射热流和有关文献用中离散坐标法、近似法及有限体积法计算得到的结果吻合得很好.从计算结果中可以观察边界上,特别是靠近发射源区域的辐射强度随方位角的变化情况.更多还原

【Abstract】 The highly-directional intensity information will be very helpful for some inverse radiative transfer problems,such as two/three-dimensional temperature reconstruction in industrial furnaces through radiative image processing techniques.In this paper,the DRESOR method was developed to solve the radiative transfer equation in a two-dimensional,isotropic scattering,rectangular enclosure. Radiative intensity with highly directional resolutions in 6658 directions in the hemisphere space at the boundary of the enclosure was provided by the DRESOR method for the isotropic scattering medium. The results for the dimensionless radiative heat flux determined by the DRESOR method agreed well with those by the discrete ordinates method,the approximate method and the finite-volume method in literature.It was found that in the enclosure with an isotropic scattering medium,the intensity at the boundary varies with the azimuthal angle,especially for the points close to the emitting source.更多还原