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OpenFOAM을 이용한 가스터빈 연소기의 부문 예혼합 연소 모델 개발
정대로(Daero Joung),허강열(Kang Y. Huh) 한국연소학회 2021 KOSCOSYMPOSIUM논문집 Vol.2021 No.11
Partially premixed combustion model was implemented combining modified Weller and steady laminar flamelet models in OpenFOAM to consider non-equilibrium and finite rate chemistry. Validation is done against measurement data for mean flow and scalar fields of swirling methane/air flames (SMA1). These approaches are applied to a lean premixed stationary gas turbine combustor of a reverse flow, semi silo type for power generation. Physical models are validated against measurement data of outlet temperature and species concentrations at the low operating pressure.
OpenFOAM을 이용한 가스 터빈 운전 조건에서의 연소 특성 및 NOx 생성 경로 연구
정대로(Daero Joung),허강열(Kang Y. Huh) 한국연소학회 2011 KOSCOSYMPOSIUM논문집 Vol.- No.42
Numerical analysis was performed to investigate the NOx formation pathways on gas turbine conditions using OpenFOAM. Validation is done against measurement data for mean flow and scalar fields of Sydney swirl flame, SM1. The standard k-e model was employed to reproduce mean turbulent flow field and turbulence-chemistry interaction was modelled by partially stirred reactor approach with GRI 3.0 mechanism. In this study NOx formation pathways including Zeldovich, nitrous oxide and prompt were investigated for gas turbine conditions. Results were compared to the experimental data of high-pressure jet-stirred reactor operating on lean-premixed methane/air.
탈휘발 예측 코드를 활용한 탈휘발 및 촤반응 모델 평가
정대로(Daero Joung),한가람(Karam Han),허강열(Kang Y. Huh),박호영(Hoyoung Park) 한국연소학회 2012 한국연소학회지 Vol.17 No.2
In this study, pre-processor code based on structural behavior of coal is applied to predict yields, pyrolysis rate and compositions of volatile and char. These parameters are used in the devolatilization and char burnout submodels as user-defined functions of commercial CFD code. The predicted characteristics of these sub-models are compared with those employing the conventional model based on experiment and validated against the measurement of a 2.1 MW swirling pulverized coal flame in a semi-industrial scale furnace. And the influence of the turbulence-chemistry interaction on pulverized coal combustion is analyzed.
가스터빈 연소기에서 운전 변수에 따른 희박예혼합 연소 특성 고찰
이재복(Jaebok Yi),정대로(Daero Joung),허강열(Kang Y. Huh),이민철(Minchul Lee) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.5
This paper presents 3-D simulation results by STAR-CCM+ against measurements for lean premixed combustion in a stationary gas turbine with separated pilot and main nozzles. The cooling conditions by radiation and convection are adjusted to match the observed flame shape and exit temperature for the reference case. The PCFM involves propagation of a laminar premixed flame with the predicted flame surface density and the equilibrium assumption in the burned gas with spatial inhomogeneities. Parametric study is performed with respect to the ratio of pilot and total fuel. Results showed reasonable agreement with measured temperatures and consistent trends of variation with respect to the operating conditions in the tested ranges. The observed flame shape corresponds to the light emission from the diffusion flame out of the main nozzle. The predicted CO is based on the thermodynamic equilibrium assumption which led to a much higher level than measurements.