【摘要】 为研究双火源间距对高层建筑竖井相邻房间内火焰形态和烟气温度的影响，以某简化的12层住宅建筑楼作为研究对象，采用FDS软件进行数值模拟研究。研究结果表明：双火源间距的变化只影响上层火源的火焰形态，而不影响下层火源，随着火源间距的增加，上层火焰从向竖井侧倾斜逐渐转变为竖直燃烧。双火源间距的增加对上层火源处的烟囱效应是削弱作用，而对下层火源是加强作用。随着双火源间距d的增加，上层着火房间顶棚烟气温度的变化规律呈现3个不同的阶段：3 m≤d≤15 m是双火源影响阶段，15 m<d<27 m是过渡阶段，d≥27 m是单火源影响阶段。基于本文数据分析，提出双火源影响阶段上层着火房间顶棚烟气温度的预测公式。研究结果可为高层建筑的消防安全设计和火灾扑救提供科学参考。更多还原

【Abstract】 In order to investigate the influence of the distance between dual fire sources on the flame morphology and smoke temperature in adjacent rooms connected to a shaft in high-rise buildings, a simplified 12-story residential building was studied using FDS software for numerical simulation.The results indicate that variation in the distance between dual fire sources affects the flame morphology of the upper fire source, not the lower one.As the distance increases, the upper flame transitions from inclined combustion toward the shaft to vertical combustion.The increase in the distance of dual fire sources weakens the chimney effect at the upper fire source while enhances it at the lower fire source.With increased distance of dual fire sources d, the smoke temperature at the ceiling of the upper fire room exhibits three distinct phases: dual fire sources influence phase(3 m≤d≤15 m),transition phase(15 m<d<27 m),single-source influence phase(d≥27 m).Based on the data analysis in this study, a predictive formula for the ceiling smoke temperature in the upper fire room during the dual fire source influence phase was proposed.These findings provide scientific guidance for fire safety design and firefighting strategies in high-rise buildings.更多还原