DESIGN AND OPERATION OF TUNNEL （隧道的设计和操作）.pdfVIP

International Journal on Engineering Performance-Based Fire Codes, Volume 1, Number 3, p.168-177, 1999 DESIGN AND OPERATION OF TUNNEL VENTILATION SYSTEM UNDER FIRE SCENARIO S. C. Kot The Hong Kong University of Science and Technology, Hong Kong, China Raymond M. H. Yau and Dennis C. W. Tang Advanced Engineering, Ove Arup Partners Hong Kong Limited, Hong Kong, China ABSTRACT The approach to tunnel ventilation system design under fire scenarios has been a controversy for engineers for many years. This paper discusses the advantages and disadvantages of different approaches like full-scale fire test, empirical method, tunnel network modelling and computational fluid dynamics technique. Example will be used to compare the results obtained from different approaches. CFD simulations have been attempted for fire simulation inside tunnels. Much of the current fire modelling techniques and assumptions are based on simulations and experience established from other areas. Validations against full-scale tunnel fire experiment are few. This paper presented one of the recent researches in the area, which form part of the continuous ‘validation’ of the CFD code for this kind of application. Recommendation based on the results will be made on the operational requirement of tunnel ventilation system under fire scenario. 1. INTRODUCTION Dynamics (CFD) technique, which has been well- established and applied in the design of building In the East Asia Region, particularly Hong Kong, there ventilation systems, enables the prediction of is a rapid development in the building industry over fundamental field variables of pressure, velocities, the last decade. The growth is expected to continue in temperature and