Instability mode and flame structure analysis of various fuel compositions in a model gas turbine combustor

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• 作者：Jisu Yoon (1)
  Min-Chul Lee (2)
  Seongpil Joo (1)
  Jeongjin Kim (1)
  Youngbin Yoon (1)
  
  1. School of Mechanical and Aerospace Engineering ; Seoul National University ; Seoul ; 151-742 ; Korea
  2. Department Safety Engineering ; Incheon National University ; Incheon ; 406-772 ; Korea
  
• 关键词：Combustion instabilities ; Flame structure ; Gas turbine combustor ; Mode analysis ; OH ; PLIF
• 刊名：Journal of Mechanical Science and Technology
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：29
• 期：3
• 页码：899-907
• 全文大小：3,309 KB
• 参考文献：1. Jones, R. M., Shilling, N. Z. (2003) IGCC gas turbines for refinery applications.
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  5. Figura, L., Lee, J. G., Quay, B. D., Santavicca, D. A. (2007) The effects of fuel composition on flame structure and combustion dynamics in a lean premixed combustor. ASME Turbo Expo 2007: Power for Land, Sea, and Air. pp. 181-187 ank" title="It opens in new window">CrossRef
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  13. Kim, M.-K., Yoon, J., Oh, J., Lee, J., Yoon, Y. (2014) An experimental study of fuel-air mixing section on unstable combustion in a dump combustor. Applied Thermal Engineering 62: pp. 662-670 ank" title="It opens in new window">CrossRef
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• 刊物类别：Engineering
• 刊物主题：Mechanical Engineering
  Structural Mechanics
  Control Engineering
  Industrial and Production Engineering
  
• 出版者：The Korean Society of Mechanical Engineers
• ISSN：1976-3824

文摘

An experimental study was conducted under various operating conditions with a model gas turbine combustor to examine the relation between combustion instability and fuel composition. Mode analysis was conducted in unstable conditions based on measured dynamic data, and the flame structure was visualized by OH-chemiluminescence and the phase-resolved OH-PLIF measurement technique. Heat input and inlet air temperature variation experiments using various fuel compositions showed that combustion instability occurs under certain conditions and the instability frequency varies based on fuel composition. Fuel composition influences the combustion dynamic characteristics and three kinds of instability frequency ranges were found under the same geometry and heat input conditions. These instabilities are the 3rd, 4th, and 6th harmonics of the fundamental longitudinal mode, and the composition of the fuel affects the occurrence of various modes. Dump plane temperature characteristics were also studied at unstable conditions and the reason for the temperature variation was found using flame visualization techniques.