引入6波段P-1辐射模型的三维空气电弧等离子体数值分析

引入了6波段P-1辐射模型，对三维空气电弧等离子体进行了仿真分析.其特点是不仅考虑了热辐射的发射问题，同时考虑了等离子体内热辐射的自吸收问题.通过计算获得了空气电弧等离子体温度和辐射能量的分布并进行了相应的分析.与净辐射系数方法相比较，P-1模型获得的温度分布较宽，其弧柱电压值更接近于实验测量值.研究表明，6波段P-1辐射模型能够更精确地求解空气电弧等离子体的辐射问题. 关键词： 热辐射 P-1模型 空气电弧等离子体 磁流体动力学

Introduction of 6-band P-1 radiation model for numerical analysis of three-dimensional air arc plasma

6-band P-1 radiation model is introduced to implement the simulation of three-dimensional air arc plasma. The calculation has the specific feature that both radiation emission and self-absorption are taken into account. The distributions of temperature and radiation flux density are obtained and analyzed. Comparing with the net emission coefficient (NEC) method，its temperature distribution range is wider and the arc column voltage is more close to the experimental test value，which shows that the P-1 model can be used to solve the arc radiation problem more accurately.