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| 中悬窗条件下建筑开口火溢流模拟研究 |
| Simulation Study on Flame Spillage through Building Openings under Center-Hung Window Conditions |
| 投稿时间：2025-07-07 修订日期：2025-11-14 |
| DOI： |
| 中文关键词: 中悬窗 悬启角度 腔室火灾 火溢流行为 数值模拟 |
| 英文关键词: center-hung window tilt angle compartment fire ejected flame from opening numerical simulation |
| 基金项目:国家自然科学基金面上项目(No.52476097),安徽省高校省级自然科学研究项目-优秀青年(No.2022AH030037) |
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| 中文摘要: |
| 为了探究不同热释放速率和中悬窗悬启角度对单腔室火灾室内温度和开口火溢流的影响，使用pyrosim软件构建单腔室建筑模型，进行FDS火灾数值模拟。模拟结果表明，火灾发生后，随着悬启角度增大，室内温度靠近窗口区域总体温度变化随着距地面高度的升高先增大后减小，内角区域随着距地面高度增大而增大。悬启角度会影响溢出火焰在外立面上的贴壁程度，悬启角度越大，溢出火焰会更加远离壁面，导致外立面轴线总体温度随着高度的增加而降低，径向温度先增大后减小，悬启角度60°-70°是一个临界角度，溢出的火焰和高温烟气更贴近外墙立面向上蔓延而不是远离。基于本模拟参数工况，在建筑防火设计中，为控制火溢流，中悬窗的悬启角度建议考虑50°至60°的相对较优区间，而非过大或过小的角度。 |
| 英文摘要: |
| To explore the influence of different heat release rates and the opening Angle of the center-hung window on the indoor temperature and open fire overflow of a single-chamber fire, a single-chamber building model was constructed using pyrosim software for FDS fire numerical simulation. The simulation results show that after the fire occurs, as the tilt angle increases, the overall temperature change in the area near the window inside the room first increases and then decreases with the increase of the height from the ground, while the inner corner area increases with the increase of the height from the ground. The tilt angle affects the degree to which the overflow flame adheres to the exterior wall. The larger the tilt angle, the further away the overflow flame will be from the wall, causing the overall temperature along the exterior wall axis to decrease with the increase in height. The radial temperature first increases and then decreases. A tilt angle of 60°-70° is a critical angle, at which point the overflow flame and high-temperature smoke are closer to the exterior wall and spread upward rather than moving away. Based on this simulation parameter, in building fire protection design, to control fire overflow, it is recommended to consider a relatively optimal range of 50° to 60° for the suspension opening Angle of the middle-hung window, rather than an Angle that is too large or too small. |
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