Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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PIV Measurements on the Flame Initiation and Propagation under Gas Explosions by Electrostatic Discharge Energies in a Confined Chamber with an Obstacle

장애물이 있는 챔버 내부의 정전기 방전 에너지에 의한 가스 폭발시 초기화염과 화염전파 특성에 대한 PIV 계측

  • 박달재 (서울산업대학교 안전공학과) ;
  • 이석환 (서울산업대학교 NID 융합기술대학원) ;
  • 성재용 (서울산업대학교 기계공학과) ;
  • 이영순 (서울산업대학교 안전공학과)
  • Published : 2009.09.01
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Abstract

In order to investigate the effects of three different electrostatic discharge energies on gas explosions, a high-speed PIV system has been applied. The present study paid attention to the flame initiation by the gas explosions and its propagation at the existence of an obstacle within a chamber. Three different ignition energies such as 0.56 mJ, 52.87 mJ and 112.5 mJ were used. It is found that the ignition kernel is bent by the electrostatic discharge during the flame initiation. Tangential velocities of unburnt mixture ahead of initially propagating flame fronts are increased with increasing ignition energy, which makes the flame propagation faster before it reaches the obstacle. Although the flame speed was found to be less sensitive to the ignition energies, the flame developments were different. The effects of the energies on explosion pressures were also discussed.

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References

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