A Experimental Study on the Characteristics of Gas Explosion due to Vent Shape and Size

벤트 현상 및 크기에 따른 가스폭발 특성에 관한 실증적 연구

  • Chae, Soo-Hyun (Department of Industrial Engineering, In-ha University) ;
  • Jung, Soo-Il (Department of Industrial Engineering, In-ha University) ;
  • Lee, Young-Soon (Department of Safety Engineering, Seoul National University of Technology)
  • 채수현 (인하대학교 산업공학과) ;
  • 정수일 (인하대학교 산업공학과) ;
  • 이영순 (서울산업대학교 안전공학과)
  • Published : 2006.06.30


The majority of both small and large-scale experiments on gas explosion have been carried out in the explosion instruments with cylindrical tubes of a high length/diameter ratio and vessels of a high height/length ratio, focusing on investigating the interaction between propagating flame and obstacles inside the tubes or vessels. The results revealed that there is a strong interaction between the propagating flame and turbulence formed after the flame passes the obstacle. However this paper focuses on analyzing the pressure impact or profile outside the vent in vented gas explosion in a partially confined chamber by performing gas explosion experiments in a reduced-scale experimental assembly properly constructed. This study has considered eight different cases in gas explosion based on variation of three kinds of parameters such as height of vessel, shape of the vent and vent size, and reveals that the large vessel with big size circle vent is more danger to the target than others because the overpressure is spread out faraway horizontally and vertically.


gas explosion;the ratio of open area;explosion pressures;explosion behaviors


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