고체입자의 수소화염에 있어서의 열복사에 관한 연구

A Study about The Effect of Radiation on Particle-Seeding Hydrogen Flame

  • 최준원 (한국과학기술원 항공우주공학과) ;
  • 백승욱 (한국과학기술원 항공우주공학과) ;
  • 김중주 (한국과학기술원 항공우주공학과) ;
  • 김한석 (한국기계연구원 환경기계연구팀)
  • 발행 : 2002.11.15

초록

From the view of the environmental protection against the use of fossil fuels, a great of efforts have been exerted to find an alternative energy source. Hydrogen may become an alternative. However the product species of the hydrogen flame is only $H_2O$, which emits only non-luminous radiation so the radiation from it is much smaller than that for a hydrocarbon flame. In this study, the authors designed and fabricated a laboratory scale test furnace to study thermal characteristics of hydrogen-air diffusion flame. In addition, the effects of addition of reacting as well as non-reacting solid particles were experimentally investigated. Among the total heat flux to the wall, about 75% was occupied by radiation while 25 % by convection. When the aluminum oxide ($Al_2O_3$) particles were added, the radiative heat flux was reduced due to heat blockage effects. On the other hand, the total as well as the radiative heat flux was increased when the carbon particles were seeded, since the overall temperature increased. The effects of swirl and excess air ratio were also examined.

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