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总结了Zukoski(1)、Zukoski(2 )、NFPA、McCaffre和Thomas -Hinkley几种常见的羽流模型和适用条件 ,运用算例对几种常见羽流模型的羽流质量流量、保持一定冷空气高度条件下的热烟气层温度和排烟体积流量进行了对比分析。结果表明 ,在冷空气层高度 2m～ 3m时 ,各羽流模型的计算结果较为接近 ;在冷空气层高度较大时 ,小面积火源条件下Zukoski(1)、Zukoski(2 )、NFPA三个模型的计算结果较为接近 ,McCaffre模型计算的羽流质量流量最大 ,热烟气层温度最低 ,排烟体积流量最大 ;大面积火源条件下 ,McCaffre模型和Thomas -Hinkley模型相比 ,羽流质量流量大 ,热烟气层温度最低 ,排烟体积流量大。在相同房间高度和地板面积条件下 ,羽流质量流量大则热烟气的充填时间短
Several common plume models and applicable conditions of Zukoski (1), Zukoski (2), NFPA, McCaffre and Thomas-Hinkley are summarized. By using the examples, the plume mass flow of several common plume models is maintained, High temperature hot flue gas temperature and exhaust volume flow were analyzed. The results show that the calculated results of each plume model are similar when the height of cold air layer is 2m ~ 3m. When the height of cold air layer is large, the small air source of Zukoski (1), Zukoski (2), NFPA The results of McCaffre model are the highest, the temperature of the hot flue gas layer is the lowest, and the volume of exhaust gas flow is the largest. In the case of large area fire source, compared with the Thomas-Hinkley model, Large mass flow, hot flue gas layer temperature minimum, exhaust volume flow. In the same room height and floor area conditions, the plume mass flow rate is large hot flue gas filling time is short