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http://dx.doi.org/10.5916/jkosme.2008.32.1.57

Numerical Study on the Thermophoretic Deposition Characteristics of Soot Particles for Wall Temperature of Burner and Surrounding Air Temperature in Combustion Duct  

Choi, Jae-Hyuk (서울대학교 기계항공공학부 창의설계인력양성사업단)
Han, Won-Hui (목포해양대학교 기관시스템공학과)
Yoon, Doo-Ho (창원기능대학, 컴퓨터응용 기계설계학과)
Yoon, Seok-Hun (한국해양대학교, 기관시스템공학부)
Chung, Suk-Ho (서울대학교 기계항공공학부)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.32, no.1, 2008 , pp. 57-65 More about this Journal
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.
Keywords
Diffusion flame; Soot deposition length; Thermophoretic effect;
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Times Cited By KSCI : 2  (Citation Analysis)
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