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网格划分、特征线间距、角度求积组、极角数目和方位角大小等几何预处理过程对特征线法的计算精度和计算效率有较大影响。基于步特征线法开发输运程序,通过数值计算验证所开发程序的正确性并分析两种特征线扫描方法(首尾相间循环扫描法、首尾相接循环扫描法)以及网格划分、特征线间距、角度求积组、极角数目、方位角大小对计算精度的影响。结果表明,开发的程序准确可靠;首尾相间循环扫描方法的收敛速度比首尾相接循环扫描方法慢。
Geometric preprocessing such as meshing, line spacing, angle quadrature group, number of polar angles and azimuth size has great influence on the accuracy and computational efficiency of the method. Based on the step character line method, the transport program was developed. The correctness of the developed program was verified by numerical calculation. The two characteristic line scanning methods (cyclic scanning method, end-to-end cyclic scanning method) and meshing, , The angular quadrature group, the number of polar angles, azimuth size of the calculation accuracy. The results show that the developed program is accurate and reliable. The convergence rate of the end-to-end and inter-cycle scanning method is slower than that of the end-to-end and cyclic scanning method.