Meilin Liu , Tiannian Zhou , Yangpeng Liu , Baohui Chen , Liangxuan Ouyang , Pan Long , Xishi Wang
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引用次数: 0
摘要
真实的火灾灾难场景总是指相邻位置同时有多处着火(MF),与单处着火(SF)相比风险更高。也就是说,现实火灾灾难中的灭火不同于现有的针对单个火焰的灭火研究。将灭火研究扩展到多重火灾是很有价值的。本研究通过 FDS(Fire Dynamic Simulator v. 6.9.1)研究了在双火焰上喷洒水雾的热力学特性。从两个方面(冷却效应和动态效应)讨论了灭火机制。水雾对双层火焰的冷却效果是基于冷却开始时间来揭示的。水滴分布被认为是水雾对双重火焰(DF)产生冷却效果的主要因素。动态效应在水雾的两种效应中占主导地位。研究发现,双层火焰之间的相互作用效应大大提高了穿透燃烧区域的难度。该研究可为水雾灭火系统在实际场景中的应用提供数值数据支持和理论参考。
Thermodynamic characterization on the suppression process of water mist under the interaction effect between two buoyant non-premixed flames
Realistic fire disaster scenarios always refer to multiple fires burning at adjacent positions at the same time (MF), leading to a higher risk compared with a single fire (SF). That is, fire suppression in realistic fire disasters differs from existing fire suppression studies focusing on a single flame. It is worthy to extend the fire suppression study to multiple fires. This study investigates the thermodynamic characteristics of applying the water mist on the double flames through FDS (Fire Dynamic Simulator v. 6.9.1). The fire suppression mechanism is discussed from two aspects (the cooling effect and the dynamic effect). The cooling effect of the water mist on the double flames is revealed based on the onset time of cooling. The droplet distribution is considered the main factor in the cooling effect of the water mist on the double flames (DF). The dynamic effect dominates in the two effects of the water mist. It is found that the interaction effect between double flames significantly improves the difficulty of penetrating the combustion area. This study can provide numerical data support and theoretical reference for water mist fire suppression systems applied in realistic scenarios.
期刊介绍:
Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application.
The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.