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Assessment of the Fire Dynamics Simulator for Modeling Fire Suppression in Engine Rooms of Ships with Low-Pressure Water Mist
Fire Technology ( IF 2.3 ) Pub Date : 2019-11-23 , DOI: 10.1007/s10694-019-00931-8
Roberto Bellas , Miguel A. Gómez , Arturo González-Gil , Jacobo Porteiro , José L. Míguez

Water mist-based fire-extinguishing systems are gaining acceptance for the protection of ship machinery spaces. The use of simulation tools presents a great potential for taking a performance-based design (PBD) approach to these fire scenarios. The Fire Dynamics Simulator (FDS) is the most frequently used and validated fire modeling software; however, studies of low-pressure water mist fire suppression modeling in ship engine rooms are rare. This paper contributes to the current literature by using the FDS to model a series of fire suppression scenarios defined by the International Maritime Organization (IMO) Circulars, including spray and pool fires with heptane and diesel oil, as well as exposed and obstructed fires. The simulation results are compared to data from full-scale tests conducted at recognized fire testing laboratories. Furthermore, an analysis of both the experimental and model uncertainties is carried out to assess the simulations performance. In general, a good agreement in compartment temperature evolution and fire extinguishing time is found for the modeled fire scenarios. The results support the application of FDS in a PBD approach for the design of water mist fire extinguishing systems for machinery spaces in ships. In this way, designers and engineers could model different machinery volumes and nozzles spacings that differ from those prescribed for a one story square engine room of the IMO, and, thus, predict the evolution of temperatures and extinguishing times for get the authorities approval.

中文翻译:

用于模拟低压细水雾船舶机舱灭火的火灾动力学模拟器评估

基于细水雾的灭火系统在保护船舶机械处所方面得到了认可。仿真工具的使用为对这些火灾场景采用基于性能的设计 (PBD) 方法提供了巨大的潜力。Fire Dynamics Simulator (FDS) 是最常用和经过验证的火灾建模软件;然而,关于船舶机舱低压细水雾灭火建模的研究很少。本文通过使用 FDS 对国际海事组织 (IMO) 通告定义的一系列灭火场景进行建模,为当前文献做出贡献,包括使用庚烷和柴油的喷雾和水池火灾,以及暴露和受阻火灾。将模拟结果与在公认的防火测试实验室进行的全面测试的数据进行比较。此外,对实验和模型的不确定性进行了分析,以评估模拟性能。一般而言,对于模拟的火灾场景,舱室温度演变和灭火时间具有良好的一致性。结果支持 FDS 在 PBD 方法中的应用,用于设计船舶机器处所的细水雾灭火系统。通过这种方式,设计师和工程师可以对不同的机械体积和喷嘴间距进行建模,这些间距与 IMO 的一层方形机舱所规定的不同,从而预测温度和灭火时间的演变以获得当局的批准。对于模拟的火灾场景,发现隔间温度演变和灭火时间有很好的一致性。结果支持 FDS 在 PBD 方法中的应用,用于设计船舶机器处所的细水雾灭火系统。通过这种方式,设计师和工程师可以对不同的机械体积和喷嘴间距进行建模,这些间距与 IMO 的一层方形机舱所规定的不同,从而预测温度和灭火时间的演变以获得当局的批准。对于模拟的火灾场景,发现隔间温度演变和灭火时间有很好的一致性。结果支持 FDS 在 PBD 方法中的应用,用于设计船舶机器处所的细水雾灭火系统。通过这种方式,设计师和工程师可以对不同的机械体积和喷嘴间距进行建模,这些间距与 IMO 的一层方形机舱所规定的不同,从而预测温度和灭火时间的演变以获得当局的批准。
更新日期:2019-11-23
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