火灾对地铁隧道排烟风机能力影响的研究_卢平.pdfVIP

27 2 Vol. 27 No. 2 2 0 0 5 4 JOURNAL OF TH E CHINA RAILWAY SOCIETY April 2005 : 1001- 360(2005) 02-0090-06 火灾对地铁隧道排烟风机能力的影响研究 1, 2 2 2 卢 平 , 廖光煊 , 范维澄 ( 1. , 230022; 2. , 230026) : , , , , , , , : ; ; ; ; : X92 .7; U279. 5 : A Research of the Influence of Fire upon the Performance of the Exhaust Smoke Fan for the Subway Tunnel Ventilation System 1, 2 2 2 LU Ping , LIA O Guang-xuan , FAN We-i cheng ( 1. Institute of Architecture and Industry of Anhui, H efei 230022, China; 2. State Key Laboratory of Fire Science, University of Science and Technology of China, H efei 230026, China) Abstract: T he influence of fire smoke behavior upon exhaust fan performance w as theoretically studied. The buoyancy effect and thermal resistance effect of fire smoke in the fire tunnel w ere systematically analyzed. The influence of the thermal resistance effect, chimney effect as w ell as the smoke flow behavior on the movement of tunnel fire smoke w ere comprehensively explored. Considering the underground tunnel ventilation netw ork and the exhaust smoke fan as a w hole, keeping in mind the factors such as the changing pattern of the smoke temperature, the density of the smoke flow , the mass flow , instead of the volume flow in the subw ay fire vent-i lation simulation, and the correction mechanism of exhaust fan performance influenced by smoke density fluctu- ations, a mathematical model of tunnel fire ventilation simulation w as established and its numerical simulation method of tunnel fire smoke flow w as provided. T he study method and results w ill provide a scientific bas