不同自然通风条件下初始相对湿度对隔间木床火灾行为影响的经验研究

IF 3.4 3区 工程技术 Q2 ENGINEERING, CIVIL
Seyed Ahmad Kebriyaee, Mohammad Moghiman, Hamid Niazmand
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引用次数: 0

摘要

本实证研究调查了初始相对湿度(35 % 和 95 %)变化对主要火灾行为参数的影响,特别侧重于完全发展阶段、闪燃发生率和上气层温度。在一个有三个开口的隔间中,使用重量为 10 公斤至 40 公斤的木箱作为燃料,以建立不同的自然通风条件。实验结果表明,提高舱内的初始相对湿度会导致火灾增长阶段的延迟。此外,它还对完全燃烧阶段产生了两个明显的影响:持续时间缩短了 50%,起火时间至少推迟了 30 秒。相反,燃料负荷较低时,温度会随着湿度的升高而显著下降,特别是从 626 °C 降到 474 °C。从这项研究中获得的定量和定性见解具有相当大的潜力,可为制定更有效的封闭舱室灭火策略提供参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Empirical study on the influence of initial relative humidity on wood crib fire behavior in compartment under varied natural ventilation conditions

This empirical study investigates the influence of initial relative humidity (RH) variations (35 % and 95 %) on key fire behavior parameters, specifically focusing on the fully developed stage, occurrences of flashover, and the temperature of the upper gas layer. Wooden cribs weighing 10 kg–40 kg are used as fuel in a compartment with three openings to establish different natural ventilation conditions. The experimental findings reveal that increasing the initial RH within the chamber leads to a delay in the onset of the fire growth phase. Furthermore, it induces two noticeable effects on the fully developed fire stage: a reduction in its duration by up to 50 % and a delay in its initiation by at least 30 s. While heightened initial RH does not prevent flashover, it effectively postpones its occurrence by a minimum of 40 s. Experiments with maximum fuel loads demonstrate negligible effects of increased RH on the maximum temperature, even under varying ventilation conditions. Conversely, lower fuel loads exhibit a significant decline in temperature with rising humidity, notably from 626 °C to 474 °C. The quantitative and qualitative insights derived from this study have considerable potential to inform the development of more effective fire suppression strategies in enclosed compartments.

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来源期刊
Fire Safety Journal
Fire Safety Journal 工程技术-材料科学:综合
CiteScore
5.70
自引率
9.70%
发文量
153
审稿时长
60 days
期刊介绍: Fire Safety Journal is the leading publication dealing with all aspects of fire safety engineering. Its scope is purposefully wide, as it is deemed important to encourage papers from all sources within this multidisciplinary subject, thus providing a forum for its further development as a distinct engineering discipline. This is an essential step towards gaining a status equal to that enjoyed by the other engineering disciplines.
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