有风情况下池火灾视角因子的计算

以视角因子的基本计算理论为基础对有风情况下池火灾视角因子的计算问题进行研究。根据几何关系，推导了有风情况下池火灾辐射面对周围任意位置接受点视角因子计算关键参量的相关公式。进一步对池火灾辐射表面进行了合理的离散化，推导出视角因子的数值计算公式，并用VB6．0编制了任意风速下池火灾周围任意点视角因子的计算公式。通过实例计算发现，在计算无风情况下池火灾视角因子时的计算结果与理论模型相差不大，计算结果可信，同时解决了目前经验模型无法解决的有风情况下池火灾视角因子的计算问题。

View Factor Calculation for Pool Fire With Cross Wind

On the base of basic theory of view factor, the view factor computation technology of pool fire with cross wind was studied. Related formulas for key parameters of view factor calculation were deduced according to the geometry topology, and further, the radiation surface of pool fire with cross wind was reasonably separated to establish the numerical computation formula of view factor. A procedure was developed using VB 6.0 for calculating view factor of pool fire with cross wind. From samples calculation, it was found that the procedure is reliable for pool fire without cross wind by comparing the result with what from theoretical model, and the new method can also effectively conquer the empirical model＇s shortcoming： incapable of calculating the view factor of pool fire with cross wind.