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금속섬유 DPF 시스템 최적화를 위한 CFD 시뮬레이션 연구
진재민(Jaemin Jin),누엔 후 트럭(Nguyen Huu Truc),박정규(Jungkyu Park),이세영(Seyoung Lee) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Diesel Particulate Filter (DPF) system is one of the promising methods to reduce diesel engine exhaust particulates which cause environmental pollution. Metal fiber DPF system cheaper and more enduarable than ceramic filter, the regeneration near the wall (outer layer) is difficult beause of the heat loss and the less gas flow rate near the wall. The uniform flow across the filter is very important to increase the regeneration efficiency of the DPF system. A 3D CFD simulation is performed to investigate the effects of major factors on the mass flow through the channel of each metal fiber filter layers. The major factors are change of filter porosity, various porosity of layer, distribution plate shape, size, location and swirler. The flow control by both of the distribution plate and swirler together was effective. In this work, the shape of the distribution plate and swirler are optimized through the CFD simulations.
가스터빈 내의 NOx 예측을 위한 화학반응기 네트워크 모델 개발
김승한(Seunghan Kim),누엔 후 트럭(Nguyen Huu Truc),박정규(Jungkyu Park),정승채(Seungchae Jung),양시원(Siwon Yang) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
In order to predict NOx and CO emission of lean premixed gas turbine, the chemical reactor network(CRN) is developed based on the computational fluid dynamics(CFD). The CRN consists of 16 chemical reactor elements which stand for different reaction zones of the combustor. The predictions of exhaust gas in this study were carried out by using CHEMKIN code and full GRI 3.0 chemical kinetic mechanism. The comparison of CRN prediction results and experimental results shows a reasonable agreement.