地下长距离管廊跨防火分区通风换热数值模拟研究
摘要：针对工程应用中常出现的综合管廊通风区间大于防火区间的不匹配问题，本文研究了管廊中防火门对管廊内通风降温的影响及防火门处气流的运动规律。采用CFD方法建立了管廊综合舱和电力舱的数值模型，研究了全年3个典型季节(冬季、夏季、过渡季)管廊运行温度沿长度方向的变化规律。研究发现：通风区间跨防火分区的通风换热方式是可行的；在不跨防火分区的夏季送风工况中，综合舱需要4 h-1的换气次数来实现降温效果，电力舱需要6 h-1的换气次数；在跨防火分区工况中，设置防火门可以加强防火门后的局部换热，减小通风换气次数。
关键词：地下管廊防火分区通风换热通风区间防火门换气次数
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[2] OHATA K,SAKURAI S.Transient temperature rise of tunnel for power cables[J].IEEE transactions on power delivery,1990,5(2):745- 752.
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[4] CANTO-PERELLO J,CURIEL-ESPARZA J,CALVO V.Criticality and threat analysis on utility tunnels for planning security policies of utilities in urban underground space[J].Expert systems with applications,2013,40(11):4707- 4714.
[5] 杨霁虹.地下综合管廊电力舱内高温聚集区的通风系统模拟研究[D].沈阳：沈阳建筑大学，2018:16- 20.
[6] 全德海.城市综合管廊正常通风的探讨[J].暖通空调，2019,49(10):51- 55.
[7] 上海市政工程设计研究总院(集团)有限公司，同济大学.城市综合管廊工程技术规范：GB 50838—2015[S].北京：中国计划出版社，2015:18- 19.
[8] 强健.综合管廊的功能区间及应用[J].中国给水排水，2020,36(18):45- 50.
[9] 强健.暗挖综合管廊的发展和研究方向[J].隧道建设(中英文),2021,41(5):764- 771.
[10] 高增.综合管廊通风分区长度的研究[J].暖通空调，2019,49(5):51- 54.
[11] 孙立，余斌，杨恒声.城市地下综合管廊通风设计探讨[J].暖通空调，2018,48(8):94- 96.
[12] 周游，周伟国.综合管廊电缆舱通风数值模拟研究[J].建筑热能通风空调，2016,35(11):29- 33.
[13] 李粤川，邓志辉.地下综合管廊运行优化研究[J].制冷与空调(四川),2020,34(5):37- 41.
[14] 邱灏，邓志辉，袁艳平，等.通风形式对综合管廊内空气温度影响的研究[J].制冷与空调(四川),2018,32(6):668- 672.
[15] 蔡增基，龙天渝.流体力学泵与风机[M].5版.北京：中国建筑工业出版社，2009:198- 199.
[16] 李善化.火力发电厂及变电所供暖通风空调设计手册[M].北京：中国电力出版社，2000:170- 173.
[17] LI S,LIU X F,WANG J X,et al.Experimental reduced-scale study on the resistance characteristics of the ventilation system of a utility tunnel under different pipeline layouts[J].Tunnelling and underground space technology,2019,90:131- 143.
Numerical simulation on ventilation and heat transfer of long-distance underground municipal tunnels across fire-prevention divisions
Abstract: In view of the mismatch that the ventilation section of the comprehensive municipal tunnels is larger than the fire-protection section in engineering applications, the influence of the fire doors on the ventilation cooling in the underground municipal tunnel and the airflow movement law at the fire doors are studied. The CFD method is used to establish the numerical models of the municipal tunnel and the cable tunnel. The operating temperature changes along the length of the underground municipal tunnel during the three typical seasons(winter, summer, transition season) of the whole year are studied. It is concluded that the ventilation and heat transfer mode of the ventilation section across the fire-prevention division is feasible. In the summer condition without across the fire-prevention division, the municipal tunnel needs 4 h-1 air change rates to achieve the cooling effect, and the cable tunnel needs 6 h-1 air change rates. In the condition across the fire-prevention division, setting the fire door can strengthen the local heat transfer behind the fire door and reduce the air change rates.
Keywords: underground municipal tunnel; fire-prevention division; ventilation and heat transfer; ventilation section; fire door; air change rate;
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