不同辐射建模下球腔的整体数值模拟

Integration simulation of spherical hohlraum using different radiation model

不同辐射建模对于腔内辐射场描述的精确程度不同,需要分析不同建模对腔内辐射温度的影响。开展了三温建模与辐射多群输运建模下LARED集成程序数值模拟两孔球型黑腔模型,实现了球腔的完整数值模拟。数值模拟结果表明,三温与辐射多群输运模拟的等离子体状态接近,辐射温度存在差异。物理分析显示辐射温度差异的主要原因是使用的辐射不透明度,修改辐射不透明度参数后的三温计算结果与输运计算符合更好,从而可以用三温建模更快更准确地估计出所需的激光能量和功率。

The integration simulation of two-hole spherical hohlraum under three-temperature model and radiation transfer model is accomplished by the 2-D LARED-Integration code.The electron temperature at corona region is comparable,while the radiation temperature inside hohlraum differs.The radiation temperature inside hohlraum intensively depends on the radiation opacity.When the opacities are close,the radiation temperatures by three-temperature model and radiation transfer model are in full accord with each other.