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Effect of buoyancy on soot formation in gas-jet diffusion flame

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Abstract

In order to investigate the effect of buoyancy on soot formation in gas-jet diffusion flame, we conducted one set of experiments with the High-Temperature Air Combustion Technology (HiCOT) system and another set under partial gravity conditions. Ethylene (C2H4) was used as fuel, and soot volume fractions for the flame were observed as shadow graph images with backlight. In the experiment with the HiCOT, the oxygen concentrations were O2 = 15 %, 17 %, and 23 %, with constant flame temperature and surrounding air temperatures of 1100 K, 900 K, and 300 K, respectively. We found that the soot volume fraction in the flames increased with the increase of the oxidizer temperature. In the partial gravity experiment meant to identify the buoyant effect, the results showed that the soot volume fraction depended on the gravity level. These results imply that soot formation in a gas-jet diffusion flame with the HiCOT is strongly affected by the buoyant flow due to oxidizer flow into the soot formation field.

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Authors and Affiliations

  1. Aeropropulsion Department, Korea Aerospace Research Institute, Daejeon, 305-333, Korea

    Byoung-Ho Jeon

  2. Korea Maritime University, 1 Dongsam-dong, Youngdo-gu, Busan, 606-791, Korea

    Jae Hyuk Choi

Authors
  1. Byoung-Ho Jeon
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Correspondence to Jae Hyuk Choi.

Additional information

This paper was recommended for publication in revised form by Associate Editor Oh Chae Kwon

Byoungho Jun received his B.S. degree in Mechanical Engineering in 1998 from Gangwon National University, and his M.S. and Ph. D. degree in Mechanical Engineering in 2002 and 2007, respectively from Hokkaido University. He was a Researcher from 2007 to 2009 in the Korea Aerospace Research Institute. Now He works in Mitsubishi Heavy Industrial in Korea for Gasturbine engine adviser. His research interests cover combustion fundamentals, Gasturbine combustion and echo energy technic.

Jae Hyuk Choi received his B.S and M.S degrees from Korea Maritime University in 1996, 2000 and Ph. D degree from Hokkaido university in 2005. He is currently a professor in Korea Maritime University. Dr. Choi’s research interests are reduction of pollution emission (soot and NOx), high temperature combustion, laser diagnostics, alternative fuel and hydrogen production with high temperature electrolysis steam (HTES).

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Jeon, BH., Choi, J.H. Effect of buoyancy on soot formation in gas-jet diffusion flame. J Mech Sci Technol 24, 1537–1543 (2010). https://doi.org/10.1007/s12206-010-0406-4

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  • DOI: https://doi.org/10.1007/s12206-010-0406-4

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