不同氧浓度船舶机舱油池火灾热流场特性

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英文篇名：Thermal flow field characteristics of ship engine oil pool fire under different oxygen concentrations 作者：苏石川 ; 崔海滨 ; 王亮 ; 郭晨宇 ; 魏承印 英文作者：SU Shi-chuan;CUI Hai-bin;WANG Liang;GUO Chen-yu;WEI Cheng-yin;College of Energy and Power Engineering, Jiangsu University of Science and Technology;China Merchants Heavy Industry Jiangsu Co., Ltd.; 关键词：船舶机舱 ; 受限空间 ; 初始氧气浓度 ; 数值模拟 ; 温度场 ; 速度场 英文关键词：ship engine room;;limited space;;initial oxygen concentration;;numerical simulation;;temperature field;;velocity field 中文刊名：XFKJ 英文刊名：Fire Science and Technology 机构：江苏科技大学能源与动力学院;招商局重工江苏有限公司; 出版日期：2019-01-15 出版单位：消防科学与技术 年：2019 期：v.38;No.283 基金：国家自然科学基金项目(21406095) 语种：中文; 页：XFKJ201901018 页数：5 CN：01 ISSN：12-1311/TU 分类号：59-63

摘要

搭建1.5 m×1.5 m×1.0 m的船舶封闭舱室火灾实验平台,以柴油池火为火源,对初始氧气体积分数为19%、20%、21%条件下的火灾演变特性进行研究。采用数值模拟和实验相结合的方法,分析舱内温度场和速度场的变化。研究结果表明:燃烧初期阶段,初始氧气浓度增加,靠近火焰根部的温升明显,而顶部区域的升幅较小;燃烧后期阶段,初始氧气浓度降低,火焰燃烧状态改变,燃烧速率和燃烧温度降低。初始氧气浓度的降低使舱内整体温度和空气流速下降,油池火燃烧速率随之下降。
        The 1.5 m × 1.5 m × 1.0 m experimental platform of enclosed cabin was established, the diesel pool fire was used as the fire source, and the fire evolution characteristics under the conditions of initial oxygen volume fraction of 19%, 20% and 21% were studied respectively. The combination of numerical simulation and experiment was used to analyze the changes of temperature field and velocity field in the cabin. The results showed that: in the early stage of combustion, the initial oxygen concentration increases,the temperature rise near the root of the flame is obvious, and the increase in the top region is smaller; in the later stage of combustion, the initial oxygen concentration decreases, the flame combustion state changes, and the burning rate decreases, which causes the decrease of flame temperature. As the initial oxygen concentration decreases, the overall temperature and air flow rate in the tank decreases, and the fire rate of the oil pool decreases.

引文

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