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Effects of Fuel Composition on Flame Transfer Function in Lean Premixed Combustor

희박 예혼합 연소기에서 연료 조성이 화염전달함수 특성에 미치는 영향

  • 김진아 (강릉원주대학교 기계자동차공학부) ;
  • 김지환 (강릉원주대학교 기계자동차공학부) ;
  • 이정원 ;
  • 김대식 (강릉원주대학교 기계자동차공학부)
  • Received : 2015.06.24
  • Accepted : 2015.09.16
  • Published : 2015.09.30

Abstract

Flame transfer function is used to determine the relationship between flow fluctuations and heat release perturbations in a lean premixed gas turbine combustor. The characteristics of flame transfer function are known to depend greatly on flame geometries in addition to other various flow conditions. However, it is not easy to experimentally measure the flame transfer function under various actual combustor operating conditions in terms of time and cost. The current research tries to model the flame transfer function using CFD(Computational Fluid Dynamics). From the results, it is shown that the calculated steady flame geometry can be exactly captured with consideration of the wall heat transfer and radiations. Also, unsteady analysis results show the close characteristics of the flame transfer function to the measured one in both gain and phase.

Acknowledgement

Supported by : 한국연구재단

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