Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Prediction of Flame Propagation Velocity based on the Behavior of Dust Particles

분진폭발의 입자거동을 고려한 화염전파속도의 예측

  • Han, OuSup (Chemical Hazard Research Team, Center for Chemical Safety and Health, Occupational Safety & Health Research Institute(KOSHA)) ;
  • Han, InSoo (Chemical Hazard Research Team, Center for Chemical Safety and Health, Occupational Safety & Health Research Institute(KOSHA)) ;
  • Choi, YiRac (Chemical Hazard Research Team, Center for Chemical Safety and Health, Occupational Safety & Health Research Institute(KOSHA))
  • 한우섭 (한국산업안전보건공단 산업안전보건연구원 화학물질안전보건센터) ;
  • 한인수 (한국산업안전보건공단 산업안전보건연구원 화학물질안전보건센터) ;
  • 최이락 (한국산업안전보건공단 산업안전보건연구원 화학물질안전보건센터)
  • Received : 2009.09.04
  • Accepted : 2009.09.23
  • Published : 2009.12.31
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Abstract

Based on experimental study of lycopodium dust particles' behavior, we suggest the flame propagation model through dust clouds. With dust concentration, flame velocity reaches a maximum value at $170g/m^3$ to exceed the stoichometric concentration for lycopodium-air mixture combustion and decreases slightly in the richer side of $500g/m^3$. At $47{\sim}200g/m^3$, mean velocity of particle increases in proportion to flame velocity. As the sum of burning rate and particle velocity is approximate in flame velocity, the flame propagation velocity with lycopodium dust concentration can be estimated by the calculation and it was found that behavior of particles is useful for better understanding of dust flame propagation velocity.

본 연구에서는 석송자 분진입자의 거동에 관한 실험적 연구결과를 바탕으로 한 분진화염 전파모델을 제시하였다. 화염전파속도는 분진농도와 함께 증가하여 석송자의 화학양론농도보다 높은 $170g/m^3$에서 최대로 나타났으며 $500g/m^3$까지 완만하게 감소 경향을 나타낸다. 농도 $47{\sim}200g/m^3$에 있어서, 분진입자속도는 화염전파속도에 비례하여 증가한다. 또한, 연소속도와 입자속도의 합이 화염전파속도에 근사한 값을 나타내고 있어, 분진농도에 따른 화염전파속도를 계산에 의해 추정이 가능하였으며, 입자의 거동이 분진의 화염전파속도를 이해하는데 유용하다는 것을 알 수 있었다.

Keywords

References

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