Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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Numerical Study on the Thermophoretic Deposition Characteristics of Soot Particles for Wall Temperature of Burner and Surrounding Air Temperature in Combustion Duct

버너의 벽면온도와 연소실내 주위공기온도에 따른 매연입자의 열영동 부착 특성에 관한 수치적 연구

  • 최재혁 (서울대학교 기계항공공학부 창의설계인력양성사업단) ;
  • 한원희 (목포해양대학교 기관시스템공학과) ;
  • 윤두호 (창원기능대학, 컴퓨터응용 기계설계학과) ;
  • 윤석훈 (한국해양대학교, 기관시스템공학부) ;
  • 정석호 (서울대학교 기계항공공학부)
  • Published : 2008.01.31
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Abstract

The characteristics of soot deposition on the cold wall in laminar diffusion flames have been numerically analyzed with a two-dimension with the FDS (Fire Dynamics Simulator). In particular, the effects of surrounding air temperature and wall temperature have been discussed. The fuel for the flame is an ethylene ($C_2H_4$). The surrounding oxygen concentration is 35%. Surrounding air temperatures are 300K, 600K, 900K and 1200K. Wall temperatures are 300K, 600K and 1200K. The soot deposition length defined as the relative approach distance to the wall per a given axial distance is newly introduced as a parameter to evaluate the soot deposition tendency on the wall. The result shows that soot deposition length is increased with increasing the surrounding air temperatures and with decreasing the wall temperature. And the numerical results led to the conclusion that it is essential to consider the thermophoretic effect for understanding the soot deposition on the cold wall properly.

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