Inversion for Fire Heat-Release Rate Using Heat Flux Measurements
Inversion for Fire Heat-Release Rate Using Heat Flux Measurements
复制标题
使用热通量测量反演火灾放热率
DOI：
10.1115/1.4046264
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Ezekoye, Ofodike A.
中科院分区：
文献类型：
--
作者：
Kurzawski, Andrew J.;Ezekoye, Ofodike A.
在火灾危险计算中，了解燃烧物品的热释放率(HRR)是必不可少的。通常，房间标度热法被用来确定常见可燃物品的HRR。然而，这一过程的成本可能高得令人望而却步。在这项工作中，提出了一种方法，通过测量房间内燃烧的单个物品在墙壁和天花板附近的瞬时热流密度来反演该物品的HRR。用于测量热流的主要设备是定向火焰温度计(DFT)。利用两种所谓的正演模型：火灾动力学模拟器(FDS)和火灾与烟雾传输的联合模型(CFAST)，研究了反演方法在合成数据和实验数据上的实用性。这项工作中的火灾具有从200 kW到400 kW的峰值HRR。结果表明，FDS作为正演模型优于CFAST，但增加了计算量；400 kW稳态火的逆重建误差与室尺度氧耗量热法相当。
In fire hazard calculations, knowledge of the heat-release rate (HRR) of a burning item is imperative. Typically, room-scale calorimetry is conducted to determine the HRRs of common combustible items. However, this process can be prohibitively expensive. In this work, a method is proposed to invert for the HRR of a single item burning in a room using transient heat flux measurements at the walls and ceiling near the item. The primary device used to measure heat flux is the directional flame thermometer (DFT). The utility of the inverse method is explored on both synthetically generated and experimental data using two so-called forward models in the inversion algorithm: fire dynamics simulator (FDS) and the consolidated model of fire and smoke transport (CFAST). The fires in this work have peak HRRs ranging from 200 kW to 400 kW. It was found that FDS outperformed CFAST as a forward model at the expense of increased computational cost and that the error in the inverse reconstruction of a 400 kW steady fire was on par with room-scale oxygen consumption calorimetry.
影响因子：
1.9
作者：
YEAGER, RW
通讯作者：
YEAGER, RW
影响因子：
3.4
作者：
P. Kokel;C. Weinschenk;O. Ezekoye
通讯作者：
O. Ezekoye
实验测试台的逆向建模和表征以推进火灾现场重建
DOI：
10.15781/t2qj78f59
发表时间：
2017
期刊：
Comput. J.
影响因子：
--
作者：
Andrew Kurzawski
通讯作者：
Andrew Kurzawski