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

The Korean Society of Mechanical Engineers (대한기계학회)
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The Study on Flame Structure and NOx Emissions by Swirl Numbers and Fuel-Air Mixing Length in a Dump Combustor Gas Turbine

모형 가스터빈 연소기에서의 스월수와 혼합길이에 따른 화염구조와 NOx배출에 관한 실험적 연구

  • 최도욱 (부산대학교 기계공학부 대학원, 기계기술연구원) ;
  • 김규보 (부산대학교, 화력발전에너지분석센터) ;
  • 전충환 (부산대학교 기계공학부) ;
  • 송주헌 (부산대학교, 화력발전에너지분석센터) ;
  • 장영준 (부산대학교, 화력발전에너지분석센터)
  • Published : 2009.11.01
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Abstract

The experimental study was performed to investigate the effects of partial premixing, varying the equivalence ratio, mixing degree, swirl intensity, mixing length on the characteristics of flame structure and NOx emission. Experiments were conducted in a dump combustor at 1 bar using methane as fuel. Inlet air temperature was 570K. OH chemiluminescence images were acquired with an ICCD camera. As a result of the experimental investigation of characteristics of flame and NOx emission in partial premixed combustor, we can conclude the results as below. With the increase of swirl number, The flame length decreases and the flame width increases and it helps flame stabilization. It means that lean flammability limit is extended. With the increase of mixing of fuel-air length ratio, Flame goes to be stabilized and NOx emission and $OH^{\ast}$ intensity decrease. Through the comparison of preceding results, It is possible that the exhausted NOx emission from a gas turbine combustor will be able to predict through the $OH^{\ast}$ intensity.

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References

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