地铁复杂网络系统内火灾烟气输运特殊行为规律研究

This project is focused on the network characteristics of smoke in hub station and tunnel fire, and the multi-technology collaboration control method will be proposed. This work will provide a scientific basis for the preventing work of the subway fire disaster. In this project, the theoretical model, numerical simulation and experimental method will be used to study the smoke characteristics. Firstly, the structure features of hub station, which is multi floors and connecting with many tunnels, will be analyzed and structured. In this structure, the fire characteristics and the transferring disciplinarian of toxic smoke will be studied and revealed. Secondly, the Kinetic and thermodynamic characteristics of smoke will be studied with hot flow and mechanical air flow, the free movement rules of smoke will be revealed. Thirdly, the station with different fire floor, fire source, and structure (such as linear hub station, chiasmatype hub station, island-station, side-station, and so on) will be analyzed, the smoke dynamics, which is under coupled effect of multi-drive(such as thermal drive, piston wind, mechanical ventilation, shaft effect and so on), will be used to define the network spread features in the hub station and tunnel. Finally, the multi-technology collaboration control method will be proposed on the base of smoke transformation law with controlled flowing.

本项目主要针对地铁隧道网络和多层枢纽站台构成的复杂地铁网络系统火灾烟气输运特殊行为规律进行研究，为复杂地铁网络的防火救灾工作提供理论依据。采用理论模型、数值模拟和实验相结合的方法，针对纵向多层、横行多通道的复杂立体换乘枢纽地铁车站和隧道的结构特点，研究地铁系统内复杂流场特性，揭示热流和补风流耦合作用对烟气输运的影响机制；在此基础上针对地铁系统内不同着火点、不同结构（同向和交叉型多向站台、岛岛式、岛侧式和侧侧式多层站台、有无屏蔽门等），探讨多驱动力（热力驱动、活塞风、机械通风、竖井效应等）耦合作用下的烟气输运的动力学行为及窜层、分岔、回流等特殊行为，揭示有控制流场下烟气变化规律；研究烟气在枢纽站台和隧道内的网络蔓延特性，建立基于强制通风措施下的烟气蔓延模型。

本项目主要针对地铁隧道和多层枢纽站台构成的复杂地铁网络系统火灾烟气输运特殊行为规律进行了研究，为复杂地铁网络的防火救灾工作提供了理论依据。采用理论模型、数值模拟和实验相结合的方法，针对纵向多层、横行多通道的复杂立体换乘枢纽地铁车站和隧道的结构特点，研究了地铁系统内复杂流场特性，揭示了热流和补风流耦合作用对烟气输运的影响机制；在此基础上针对地铁系统内不同着火点、不同结构（多层站台、交叉型多向站台、岛岛式多层站台、岛侧式多层站台、侧侧式多层站台、有无屏蔽门等），探讨了多驱动力（热力驱动、活塞风、机械通风、竖井效应等）耦合作用下的烟气输运的动力学行为及窜层、分岔、回流等特殊行为，揭示了有控制流场下烟气变化规律；研究了烟气在枢纽站台和隧道内的网络蔓延特性，建立了基于强制通风措施下的烟气蔓延模型。