가스터빈 연소기용 축방향 다단연소 노즐의 연소특성
Combustion Characteristics of Axial Fuel Staging Nozzles for Gas Turbine Combustors
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Axial fuel staging (AFS) nozzle variants for applying to heavy duty gas turbine combustors were designed and experimentally investigated in this study. Four AFS nozzle variants (elliptic, dual elliptic, airfoil, and low-swirl type) were designed and single AFS nozzle test was conducted at the 1/4-scale combustion test rig with measurement module consists of 25-points emissions and 30-points exit temperatures. Flame structures were observed with OH-Planar Laser Induced Fluorescence (PLIF) and direct photo. When the fuel split was about 120% of the air split, NOx emission was minimum which is about 80% of the reference. Flame penetration was increased with air split and temperature profile pattern factor was found to be the lowest in dual elliptic nozzle. Four dual elliptics nozzles were mounted in the middle of the can combustor to conduct the full-can combustion test. Minimum NOx emissions were found at 10.4% fuel split, which is 120% of air dsplit.
Abstract
Axial fuel staging (AFS) nozzle variants for applying to heavy duty gas turbine combustors were designed and experimentally investigated in this study. Four AFS nozzle variants (elliptic, dual elliptic, airfoil, and low-swirl type) were designed and single AFS nozzle test was conducted at the 1/4-scale combustion test rig with measurement module consists of 25-points emissions and 30-points exit temperatures. Flame structures were observed with OH-Planar Laser Induced Fluorescence (PLIF) and direct photo. When the fuel split was about 120% of the air split, NOx emission was minimum which is about 80% of the reference. Flame penetration was increased with air split and temperature profile pattern factor was found to be the lowest in dual elliptic nozzle. Four dual elliptics nozzles were mounted in the middle of the can combustor to conduct the full-can combustion test. Minimum NOx emissions were found at 10.4% fuel split, which is 120% of air dsplit.
참고문헌 (16)
- J. E. Portillo, "Low NOx combustor design for η > 65% CC", UTSR Conference (2015)
- H. Karim, "Staged combution system for improved emissions operability & flexibility for 7HA class heavy duty gas turbine engine", Proceedings of ASME Turbo Expo (2017)
- R. Kulkarni, "Numerical simulation of a reaction jet in a vitiated cross flow using a novel progress variable approach", Proceedings of ASME Turbo Expo (2017)
- D. Ahrens, "NOx formation in a reacting premixed jet in hot cross flow", Proceedings of ASME Turbo Expo (2014)
- D. Ahrens, "Influence of preflame and postflame mixing on NOx formation in a reacting premixed jet in hot cross flow", J. Eng. Gas Turbines Power, 138, pp.081506~ (2016)
- M. Kolb, "A model for predicting the lift-off height of premixed jets in vitiated cross flow", J. Eng. Gas Turbines Power, 138, pp.081901~ (2016)
- D. Ahrens, "NOx-formation in reacting premixed jets in hot cross flow", Ph.D., pp.2015
- M. Kolb, "Influence of the injector geometry on mixing and lift-off of premixed jet flames in hot cross flow", Ph.D., pp.2016
- M. D. Sirignano, "Nitrogen oxide emissions from rich premixed reacting jets in a vitiated crossflow", Proc. Combust. Inst, 37, pp.5393~5400 (2019)
- V. Nair, "Shear Layer Dynamics in a Reacting Jet in Crossflow", Proc. Combust. Inst, 37, pp.5173~5180 (2019)
- J. Hwang, "NOx emission of axial staging combustion for heavy duty gas turbines", The 61th KOSCO Symposium, pp.140~ (2021)
- J. Hwang, "Axial staging combustion of heavy duty gas turbines", The 63th KOSCO Symposium, pp.40~41 (2022)
- J. Hwang, "Development of axial fuel staging combustion technology for gas turbine combustors", The 65th KOSCO Symposium, pp.2~3 (2023)
- Y. Choi, "Mode shape-dependent thermoacoustic interactions between a lean-premixed primary flame and an axially-staged transverse reacting jet", Combust. Flame, 255, pp.112884~ (2023)
- Y. Choi, "Experimental investigation of thermoacoustic interactions between axially-staged lean-premixed flames", The 65th KOSCO Symposium, pp.131~133 (2023)
- G. Han, "Influence of injector spacing on combustion dynamics of axially-staged lean-premixed flames", The 65th KOSCO Symposium, pp.241~242 (2023)