Interactions Between a Propagating Flame and Rectangular Wall Obstacles in a Rectangular Confinement

직사각형 폭발 챔버에서 화염전파와 직사각형 장애물의 상관관계

  • Park, Dal-Jae (Research Center for System Safety, Seoul National University of Technology) ;
  • Lee, Tae-Sung (Department of Energy Safety Engineering, Graduate School of Energy & Environment, Seoul National University of Technology) ;
  • Lee, Young-Soon (Department of Safety Engineering, Seoul National University of Technology)
  • 박달재 (서울산업대학교 생산기술연구소 시스템안전연구센터) ;
  • 이태성 (서울산업대학교 에너지환경대학원 에너지안전공학과) ;
  • 이영순 (서울산업대학교 공과대학 안전공학과)
  • Published : 2008.04.30


Experimental studies have been performed to examine the influences of wall obstructions in a rectangular confinement. Three wall obstacles with blockage ratios ranging from 10 to 30% were used. Temporally resolved flame front images were recorded by a high-speed video camera to investigate the interaction between a propagating flame and the obstacle. The local flame displacement speed and its probability density functions(PDFs) were obtained for the wall obstructions. During the interaction with the sharp-edges of the wall obstacles, the local propagation speed increased. The increase of local speed became larger as the obstruction ratio increased. However, the averaged flame displacement speeds with different blockage ratios were not significantly different within the chamber as shown in the paper of Park et al. The flame front interaction investigated in this work was less dependent of the obstacle obstructions compared to that published in the literature for large L/D.


obstruction ratio;flame displacement speed;flame propagation


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