利用FDS不同燃烧模型预测McCaffrey羽流

本文将FDS中所包含的不同形式的燃烧模型(单步反应单混合分数模型,单步反应双混合分数模型,两步反应三混合分数模型)的预测值与实验数据进行了对比。在火焰区内,FDS4单步反应和FDS5单步反应在大部分高度范围内高估了中心线温度。在羽流区内,在较低高度处,FDS5单步反应的预测值高于实验值,而在较高处,FDS5的预测值与实验值趋于接近。在羽流区内,FDS4单步反应的竖向速度预测值低于实验值,而FDS5单步反应的竖向速度预测值在较低高度处高于实验值,在较高处低于实验值。

Using FDS Different Burning Model to Predict McCaffrey Plume

This article compared the predicted values and experimental data of different forms of combustion model（single-step reaction-single mixture fraction model,single-step reaction two mixture fraction model,two-step reaction three mixture fraction model） of the FDS.In the flame zone,FDS4 single-step reaction and FDS5 single-step reaction overestimated the centerline temperature in the most height range.In the plume area and at the lower height,the predicted value of FDS5 single-step reaction is higher than the experimental value,while at higher height,they are closer.In the plume area,the predicted value of vertical velocity for FDS4 vertical single-step reaction is lower than the experimental value,while that of FDS5 vertical single-step reaction is higher than the experimental value in the lower height,and is lower than the experimental values at higher height.