51开关电源代码，程序基本构架，思路，核心代码。-51 switching power supply code, the basic framework of the program, the ideas, the core code.

一个CFD代码，用来模拟照明灯的流动和传热，核心是运用离散坐标辐射模型来计算辐射换热-a CFD code for simulating the flow and heat transfer of a headlamp, focusing on the using of discrete ordinates radiation model.