Characteristics of Fire-induced Thermal-Flowfields in an Underground Utility Tunnel with Ventilation

화재 발생시 환기방식에 따른 지하공동구내 열유동 특성 연구

  • 김홍식 (성균관대학교 대학원) ;
  • 황인주 (한국건설기술연구원 건축설비 및 플랜트연구그룹) ;
  • 김윤제 (성균관대학교 기계공학부)
  • Published : 2003.04.23

Abstract

The underground utility tunnels are important facility as a mainstay of country because of communication developments. The communication and electrical duct banks as well as various utility lines for urban life are installed in the underground utility tunnel systems. If a fire breaks out in this life-line tunnel, the function of the city will be discontinued and the huge damages are occurred. In order to improve the safety of life-line tunnel systems and the fire detection, the behaviors of the fire-induced smoke flow and temperature distribution are investigated. In this study we assumed that the fire is occurred at the contact or connection points of cable. Numerical calculations are carried out using different velocity of ventilation in utility tunnel. The fire source is modeled as a volumetric heat source. Three-dimensional flow and thermal characteristics in the underground tunnel are solved by means of FVM (Finite Volume Method) using SIMPLE algorithm and standard ${\kappa}-{\varepsilon}$ model for Reynolds stress terms. The numerical results of the fire-induced flow characteristics in an underground utility tunnel with different velocity of ventilation are graphically prepared and discussed.

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