不同排烟量和漏风情况下的隧道通风网络解算

发布时间：2018-05-20 18:24

本文选题：消防工程 + 隧道火灾　；参考：《安全与环境学报》2014年02期

【摘要】：在通风网络理论的基础上编制了基于质量描述的隧道网络通风计算程序,并采用模型试验方法对火灾通风网络计算结果进行了验证,证实了网络程序的可靠性。将研编的通风网络计算程序应用于某隧道集中排烟模式下火灾通风排烟技术研究,探讨了排烟量和漏风量对排烟道内和排烟阀处烟气流速的影响规律。结果表明,增加排烟量时,排烟道内和排烟阀处烟气流速呈升高趋势,越靠近排烟风机处,其烟气流速升高趋势越明显。漏风分支风阻的大小较显著地影响着漏风量的大小。减小未开启排烟阀的分支风阻系数,漏风量增大,开启的排烟阀处流量减少,当漏风分支风阻系数减小到10 N·s/(kg·m)2时,漏风量超出规范规定值。
[Abstract]:Based on the ventilation network theory, a tunnel ventilation calculation program based on quality description is developed, and the model test method is used to verify the calculation results of the fire ventilation network. The reliability of the network program is verified. The developed ventilation network calculation program is applied to the study of fire ventilation and smoke exhaust technology in a tunnel under the centralized exhaust mode. The influence of exhaust volume and air leakage on the flue gas velocity in the flue and the exhaust valve is discussed. The results showed that the flow velocity of flue gas in flue and exhaust valve increased when the amount of exhaust gas was increased, and the more close to the exhaust fan, the more obvious the increasing trend of flue gas velocity was. The wind resistance of the air leakage branch has a significant effect on the air leakage. The branch air resistance coefficient of the unopened exhaust valve is reduced, the air leakage volume increases, and the flow rate at the open exhaust valve decreases. When the air leakage branch air resistance coefficient is reduced to 10 N s/(kg m) 2, the air leakage volume exceeds the specified value.
【作者单位】：中南大学防灾科学与安全技术研究所;华北水利水电大学环境与市政工程学院;
【基金】：浙江省科技厅科技计划项目(2008C13041-2)
【分类号】：U453.5

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