2nd Flame Phenomena in Laminar Flame Propagation of Dust-Air Mixtures

가연성 분진운의 층류화염 전파에 있어서 2차화염의 거동

  • 한우섭 (요꼬하마국립대학 공학부 물질공학과) ;
  • 정국삼 (충북대학교 공과대학 안전공학과)
  • Published : 1998.09.01


In long vertical duct, the aspect of second flame in laminar flame propagating through lycopodium-air mixtures and the behavior of dust particles in neighborhood in front of flame have been examined experimentally. In order to trace the development of second flame to its origin, the velocity and vorticity distribution of dust particles in front of flame were measured by using with the real-time PIV system. The velocity of particles was approximately zero at the central part of flame front and the ahead of the flame leading edge, but maximum near the duct wall. The flame velocity of second flame and the movement of leading flame edge depend mainly on behavior of dust particles by the flow distribution of temperature and pressure.