风机机舱火灾热流场特性数值研究

Numerical study on thermal flow field characteristics of plant room fires on wind nacelle

为研究风机机舱发生火灾后的热流场特性规律,建立适用于风机机舱火灾计算的数学物理模型,对描述质量、动量和能量运输的通用方程进行简化和变形,用数值程序进行了求解,得到火灾发生后热释放速率及机舱内温度、热流、烟气高度等参数数据;分析典型火灾工况下各参数变化的反应延迟时间和变化规律、以及典型工况下特征参数的阈值,通过分析火灾流场特性变化规律,为风机消防设计提供参考。

In order to study thermal flow field characteristics of plant room fires on wind nacelle,mathematical and physical models common applied in fire simulation are developed.The conservation equations on mass momentum and energy are simplified and reduced to a form suitable for describing fluid flow driven by a fire.The fire scenes of plant room are simulated for by computer modeling,get parameters like heat release rate,temperature,thermal flow and flue height.Analyze the variety law,delayed reaction time and threshold for those parameters in apical fire operating condition to provide the basis for plant room fire control design.