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

The Korean Society of Mechanical Engineers (대한기계학회)
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Introduction to Flame Transfer Function in Lean Premixed Gas Turbine Combustor

희박 예혼합 가스터빈 연소기에서의 화염 전달 함수 소개

  • Kim, Dae-Sik (School of Mechanical and Automotive Engineering, Gangneung-Wonju Nat'l Univ.)
  • 김대식 (강릉원주대학교 기계자동차공학부)
  • Received : 2011.06.21
  • Accepted : 2011.07.11
  • Published : 2011.09.01
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Abstract

Lean premixed gas turbine combustors were successful in meeting current NOx emission regulations. However, these combustors have been found to be susceptible to combustion instability. In this study, general mechanisms for combustion dynamics and instabilities in lean premixed gas turbine combustors are introduced. In addition, the flame transfer functions in the combustor are experimentally determined. The inputs to the flame transfer function are the imposed velocity fluctuations of the mixture. The key results of the measurements are reviewed.

희박 예혼합 가스터빈 연소기는 강화되는 NOx 배출가스 규제를 만족시키기 위한 가장 현실적인 방법으로 인식되고 있다. 그러나 이러한 희박 예혼합 연소기에서는 열발생파와 시스템 내부의 압력파 사이의 상호 피드백 관계에 의한 연소 불안정 현상으로 인하여 그 적용이 제한되거나, 이를 회피하기 위한 기술의 적용으로 인하여 설계 비용의 상승이 불가피하다. 본 논문에서는 연소 불안정 현상이 발생하는 기본 메커니즘을 소개하고, 연소 불안정 원인 규명의 일환으로 최근 활발히 연구되고 있는 화염전달 함수 측정이 실험적으로 규명되었고, 주요 측정 결과가 소개되었다.

Keywords

References

  1. Liewen, T. and Yang, V., 2005, "Combustion Instabilities in Gas Turbine Engines," AIAA, Washington.
  2. Preetham, T., 2007, "Modeling the Response of Premixed Flames to Flow Disturbances," Ph.D. thesis, Georgia Inst. of Tech.
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  6. Kim, D., Lee, J., Quay, B., Santavicca, D., Kim, K. and Srinivasan, S., 2010, "Effect of Flame Structure on the Flame Transfer Function in a Premixed Gas Turbine Combustor," Journal of Engineering for Gas Turbine and Power, Vol. 132.

Cited by

  1. Improved Thermoacoustic Model Considering Heat Release Distribution vol.38, pp.6, 2014, https://doi.org/10.3795/KSME-B.2014.38.6.443
  2. Flame Response Modeling for Lean Premixed Combustors Using CFD vol.38, pp.9, 2014, https://doi.org/10.3795/KSME-B.2014.38.9.773