CAJ | 학술논문

针对自然通风的半敞开式城市隧道火灾时不能充分保障人员安全疏散的问题,文章运用Fire Dynamic Simulation (FDS)火灾模拟软件及风洞实验台对城市隧道火灾在自然通风和混合式通风两种不同模式下的烟气扩散情况进行了数值模拟和实验研究. 结果表明,半敞开式城市隧道自然通风不能有效解决火灾的安全问题;而当排烟系数在3.3左右时,混合式通风能实现烟气的有效控制,保证了人员及车辆的安全疏散.采用本文提出的排烟系数研究半敞开式城市隧道的混合通风模型,可以为该类隧道的火灾安全防范提供一定的理论依据.
침대자연통풍적반창개식성시수도화재시불능충분보장인원안전소산적문제,문장운용Fire Dynamic Simulation (FDS)화재모의연건급풍동실험태대성시수도화재재자연통풍화혼합식통풍량충불동모식하적연기확산정황진행료수치모의화실험연구. 결과표명,반창개식성시수도자연통풍불능유효해결화재적안전문제;이당배연계수재3.3좌우시,혼합식통풍능실현연기적유효공제,보증료인원급차량적안전소산.채용본문제출적배연계수연구반창개식성시수도적혼합통풍모형,가이위해류수도적화재안전방범제공일정적이론의거.
Aimed at the problem of not being able to fully guarantee safe evacuation in case of urban tunnel fires with semi-open natural ventilation, the Fire Dynamic Simulation (FDS) software and a wind tunnel experimental platform were used to carry out a numerical simulation and experimental study on how smoke diffuses under nat-ural ventilation and hybrid ventilation modes. The results show that natural ventilation used in a semi-open urban tunnel is unable to solve the problems of fire safety, but hybrid ventilation can effectively control smoke when the exhaust coefficient reaches 3.3, which assures the safe evacuation of personnel and vehicles. Additionally, the ex-haust coefficient presented in this paper and applied in the study of the hybrid ventilation mode for semi-open urban tunnels may provide a theoretical basis for similar tunnels regarding safety during fires.