Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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A Experimental Study on Gas Explosions by Variations L/D ratio in a Partially Confined Geometry

부분 밀폐 공간에서의 L/D비 변화에 따른 가스 폭발의 실험적 연구

  • Lee, Young-Soon (Department of Safety Engineering Seoul National University of Technology) ;
  • Park, Dal-Jae (Graduate School The University of New South Wales) ;
  • Ahan, Jeong-Jin (Graduate School Seoul National University of Technology) ;
  • Ahan, Sung-Joon (Graduate School Seoul National University of Technology) ;
  • Oh, Shin-Kyu (R&D Division Korea Gas Corporation)
  • 이영순 (서울산업대학교 안전공학과) ;
  • 박달재 (호주 New South Wales 대학교 대학원) ;
  • 안정진 (서울산업대학교 산업대학원) ;
  • 안성준 (서울산업대학교 산업대학원) ;
  • 오신규 (한국가스공사 연구개발원)
  • Published : 2006.04.30
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Abstract

It is revealed that these are correlated with the height of chamber deciding the turbulence extent. In the first experiment, It was examined about the effects of different multiple obstacles such as circular, triangular and square things with the rig that the dimension of original experimental rig was $700{\times}700{\times}200mm{\wedge}3$. Then the heights of chamber were increased from 200 to 1000mm. The dimensions of each obstacle were $70{\times}700{\times}{\wedge}2$ and rectangular vent area were $210{\times}700{\times}{\wedge}2$. In the second one, we performed to see the effects of locations of different multiple obstacles in 200, 500 and 800mm height from the bottom. The results are : The multiple triangular obstacles caused the highest overpressure while the lowest one was the multiple circle bars. Then, the triangular bars caused the highest flame acceleration while the circular obstacles was lowest too. The results showed that the critical height was 800mm due to the formation of turbulence. And the lesser $Av/V^{2/3}$ were small, the more pressure and pressure acceleration rate were increased.

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References

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