安全与环境工程2025，Vol.32Issue(3)：121-128,142,9.DOI:10.13578/j.cnki.issn.1671-1556.20240288
高层建筑室内火灾-天井开口火溢流温度演化研究
Investigation on the temperature evolution of compartment-spilled fire in a patio of high-rise building
摘要
Abstract
High-rise building fire could lead to catastrophic social consequences.The patio structure is widely utilized in high-rise buildings.When the compartment fire becomes under-ventilated with the following spilled fire plume from compartment opening,the fire smoke would spread inside the vertical patio,in which the chimney effect of the patio drives the smoke to quickly spread upwards and cause significant fire impacts.Taking a real building construction as an example,a full-scale numerical model based on FDS was established to investigate the time-varying process of the compartment fire temperature,the movement of the fire plume from the patio opening,and the evolution of the temperature field under different fire scenarios.The chimney effect of the patio upon the spilled fire plume from the compartment opening was presented.The results show that after the ignition of compartment fire,the spilled fire plume from compartment opening is fully developed within 800 seconds,while the interaction of dual spilled fire plume in the patio forces smoke to accumulate inside rooms.When the heat release rate is 6 MW,the smoke fulfills the entire upper part of the patio so that the temperature is low.However,when the heat release rate reaches 12 MW,the hot flame and smoke is comprehensively promoted upwards.The vertical temperature profile of the centerline and four sidewalls of the patio is further analyzed.It is found that the temperature of fire-spread sidewalls is firstly increased and then decreased with the increase of vertical height,but the vertical temperature of patio center and non-fire-spread sidewall would be increased with the vertical height.The research results provide an important theoretical basis for the spilled fire plume behavior in the patio of high-rise building,which brings in important practical significance for the fire protection of high-rise buildings.关键词
高层建筑火灾/天井/烟囱效应/多开口火溢流/温度演化Key words
high-rise building fire/patio/chimney effect/spilled fire from multiple opening/temperature evolution分类
安全科学引用本文复制引用
鲁广斌,陆凯华,孟祥龙,王雯莉,汪芷嫣,徐华升,余阳..高层建筑室内火灾-天井开口火溢流温度演化研究[J].安全与环境工程,2025,32(3):121-128,142,9.基金项目
国家自然科学基金项目(52376133、52076199) （52376133、52076199）
