Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Numerical Investigation on Fire of Stage in Theater: Effects of Natural Smoke Vent Area and Fire Source Location

공연장 무대부 화재에 대한 전산해석 연구: 자연 배연구 면적과 화원 위치 영향

  • Park, Min Yeong (Division of Architectural and Fire Protection Engineering, Pukyong National University) ;
  • Lee, Chi Young (Department of Fire Protection Engineering & Division of Architectural and Fire Protection Engineering, Pukyong National University)
  • 박민영 (부경대학교 건축.소방공학부) ;
  • 이치영 (부경대학교 소방공학과)
  • Received : 2021.10.26
  • Accepted : 2021.12.27
  • Published : 2022.02.28
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Abstract

This numerical study investigates the effects of the size of the natural smoke vent area (10% and 1% of the floor area) and the location of the fire source (i.e., at the side and center of the stage) on the temperature distribution in the compartment and velocity distribution and mass flow rate of flow through a natural smoke vent for a reduced-scale model of a theater stage. Then, the mass flow rate of outflow through the natural smoke vent in the event of a fire for a real-scale theater stage was examined. The case with the larger natural smoke vent area and central fire source location showed lower temperature distributions and higher mass flow rates of outflow and inflow than the case with the smaller natural smoke vent area and side fire source location. The trends of the temperature distributions were closely related to those of the mass flow rates for the outflow and inflow. Additionally, the case with the larger natural smoke vent area and central fire source location exhibited the most non-uniform flow velocity distribution in all cases tested. A bidirectional flow, in which the outflow and inflow occur simultaneously, was observed through the natural smoke vent. In the event of a fire situation in a real-scale theater stage, it was predicted that the case with the larger natural smoke vent area and central fire source location would have a mass flow rate of outflow that is 43.53 times higher than that of the case with the smaller natural smoke vent area and side fire source location. The present results indicate that the natural smoke vent location should be determined by considering the location in a theater stage where a fire can occur.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT) (No. 2019R1F1A1062867).

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