| 李 英,王 艳.某地下车库不同排烟口高度及朝向排烟效率数值模拟研究[J].安徽建筑大学学报,2014,22(3):78-82 |
| 某地下车库不同排烟口高度及朝向排烟效率数值模拟研究 |
| Numerical Simulation on the Mechanical Smoke Extraction Efficiency under Various Venting Heights and Directions in an Underground Garage |
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| DOI：10.11921/j.issn.2095-8382.20140318 |
| 中文关键词: 地下车库 排烟系统 排烟口高度 排烟口朝向 排烟效率 |
| 英文关键词: underground garage smoke extraction system venting heights venting directions smoke extraction efficiency |
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| 中文摘要: |
| 以某商业中心地下二层车库为研究对象，设计了几种不同排烟口高度及朝向的排烟模式。基于FDS软件模拟研究其排烟效果的差异和发生火灾时产生的烟气在建筑物内的流动情况，并分析比较车库发生火灾时温度、CO浓度和能见度等典型参数。模拟结果发现较高的排烟口排烟效率相对较高，尤其是对于向下开口型排烟口。而在同一高度，使用侧方开口型排烟口更有利于烟气的排出。数值模拟结果在实际地下车库防排烟系统的设计建造中有一定的指导意义。 |
| 英文摘要: |
| The mechanical smoke extraction efficiency under various venting heights and directions in an underground garage were studied. Based on the Fire Dynamic Simulator program, a fire was set up in the garage and several kinds of venting types in the smoke extraction were simulated with smoke extraction system set as the requirement of current regulations in China. Fire signals including temperature distribution, carbon monoxide concentration, soot visibility profiles and smoke layer height are obtained. Results show that smokes are easier to be extracted outside the garage when the venting position is higher, and thus the visibility is better, especially for the downward-venting type, while the temperature and carbon monoxide concentration are also a little lower than those of lower venting positions. The smoke extraction efficiency of the sideward-venting types is better than the downward-venting types, which can also be a guide to the designation of smoke extraction systems in underground garages. |
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