화학 반응기 네트워크와 전산유체해석을 통한 수소 전소 가스터빈 연소기의 NOx 예측
NOx Prediction of a Hydrogen Gas Turbine Combustor using Chemical Reactor Network and Computational Fluid Dynamics
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초록
The NOx emission prediction simulations were conducted and compared with the experimental results. To compare the NOx emission, 3 bar and 8 bar hydrogen combustion experiments were performed using a PPMN nozzle. Also, the chemical reactor network(CRN) and computational fluid dynamics(CFD) simulations were conducted. For the CRN simulation, perfectly stirred reactor(PSR) and plug flow reactor (PFR) were used to simulate the liner and transition piece of the PPMN nozzle. For the CFD simulation, conjugate heat transfer simulation was performed to predict NOx at the domain outlet. Both CRN and CFD simulations showed acceptable prediction capability at the end of the liner and domain outlet which errors were less than 10%. Using the 3 bar and 8 bar NOx results, pressure and NOx correlations were calculated. The NOx data were modeled for conditions up to 14 bar using experimental results, CRN, and CFD. At an operating pressure of 14 bar, modeled NOx error between experimental and simulation results showed less than 15%.
Abstract
The NOx emission prediction simulations were conducted and compared with the experimental results. To compare the NOx emission, 3 bar and 8 bar hydrogen combustion experiments were performed using a PPMN nozzle. Also, the chemical reactor network(CRN) and computational fluid dynamics(CFD) simulations were conducted. For the CRN simulation, perfectly stirred reactor(PSR) and plug flow reactor (PFR) were used to simulate the liner and transition piece of the PPMN nozzle. For the CFD simulation, conjugate heat transfer simulation was performed to predict NOx at the domain outlet. Both CRN and CFD simulations showed acceptable prediction capability at the end of the liner and domain outlet which errors were less than 10%. Using the 3 bar and 8 bar NOx results, pressure and NOx correlations were calculated. The NOx data were modeled for conditions up to 14 bar using experimental results, CRN, and CFD. At an operating pressure of 14 bar, modeled NOx error between experimental and simulation results showed less than 15%.
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