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

The Korean Society of Mechanical Engineers (대한기계학회)
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Measurements of Temperature and OH Radical Distributions in Flame Hydrolysis Deposition Process

화염 가수분해 증착공정에서 온도 및 OH 분포측정

  • 황준영 (서울대학교 정밀기계설계공동연 나도입자제어연구단) ;
  • 길용석 (서울대학교 정밀기계설계공동연 나도입자제어연구단(현) 송도테크노파크) ;
  • 김정익 (서울대학교 대학원) ;
  • 최만수 (서울대학교 기계항공공학부) ;
  • 정석호 (서울대학교 기계항공공학부)
  • Published : 2000.11.01
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Abstract

The effects of SiCl$_4$addition on flame structures have been studied in flame hydrolysis deposition (FHD) processes using Coherent anti-Stokes Raman spectroscopy (CARS) and planar laser induced fluorescence (PLIF) to measure temperatures and OH concentrations, respectively. The results demonstrate that even a small amount of SiCl$_4$ addition can change thermal and chemical structures of H$_2$/O$_2$ diffusion flames. When SiCl$_4$ is added to a flame temperature decreases in non-reacting zone due to the increases in both specific heat and density of the gas mixture, while flame temperature increase in particle formation zone due to the heat release through hydrolysis and oxidation reactions of SiCl$_4$. It is also found that OH concentration decreases dramatically in particle formation zone where temperatures increase. This can be attributed to consumption of oxidative species and generation of HCl during silica formation.

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References

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