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金炅勳,安光憲 慶熙大學校 1983 論文集 Vol.12 No.-
The wakes of turbomachinery rotor blade are turbulent, three dimensional, and are subjected to curvature and rotation effects. The objective of this study is to predict the development of such wakes and compare the predictions with the existing data. A finite difference precedure in employed in the numerical analysis of the wake utilizing the continuity, momentum, and turbulence closure equation in the rotating curvilinear and non-orthogonal coordinate system. The effects of curvature and rotation on the turbulence structure are accounted for with this turbulence closure model. The predictions from the present turbulence model agree well with the mean velocity and the turbulence wake data.
정성철(Seong-Cheol Jeong),안광헌(Kwang-Hean An),이재우(Jae-Woo Lee) 한국마린엔지니어링학회 2009 한국마린엔지니어링학회 학술대회 논문집 Vol.2009 No.-
The International Maritime Organization (IMO) has introduced Annex Ⅵ of MARPOL 73/78 - regarding the prevention of air pollution from ships in order to prevent the global environment and rectified the adoption of the regulations. Emissions from sea-going vessels are known as Nitrogen Oxide(NOx), Sulphur Oxide(SOx), Green House Gas(GHG), Particulate Matter(PM) emissions from diesel engines, Volatile Organic Compounds emission from ships. In particular, IMO has highlighted NOx emission regulations. The tightened future IMO NOx regulations (IMO Tier Ⅱ and Tier Ⅲ) have been adopted and the new regulations are scheduled to be executed in 2011 and 2016. At present most engine manufacturers have been making their utmost effort to comply with future IMO regulations and this paper is describing NOx test results through application of optimal components design to have optimized combustion for the compliance with IMO Tier Ⅱ.
중형 디젤 엔진의 연료분사노즐 형상에 따른 성능 해석 연구
김기두,윤욱현,김병석,하지수,안광헌,김주태,Kim, Ki-Doo,Youn, Wook-Hyun,Kim, Byong-Seok,Ha, Ji-Soo,Ahn, Kwang-Hean,Kim, Ju-Tae 한국마린엔지니어링학회 2006 한국마린엔지니어링학회지 Vol.30 No.6
The effects of fuel injection nozzle hole on the NOx emission and fuel oil consumption of medium speed diesel engine HYUNDAI HiMSEN 6H21/32 engine are investigated by engine performance simulation. The results of performance simulation are verified by experimental results of NOx omission fuel oil consumption, cylinder pressure, and heat release rate according to the variation of the number of fuel injection nozzle hole and engine load. The performance simulations are also carried out to optimize the fuel injection nozzle of 6H21/32 engine in respect to the NOx emission and fuel oil consumption. The engine performance measurements are performed to verify the results of performance simulation and to investigate the effects of fuel injection nozzle on engine performance. The results of measurement indicate that significant NOx reduction can be achieved with minimum deterioration in fuel oil consumption by optimizing the geometry of fuel injection nozzle on 6H21/32 engine.
흡기가습 시스템을 이용한 중형엔진의 NOx 저감 기술 연구
박형근(Hyoung-Keun Park),하지수(Ji-Soo Ha),갈상학(Sang-Hak Ghal),박종일(Jong-Il Park),안광헌(Kwang-Hean An) 한국마린엔지니어링학회 2006 한국마린엔지니어링학회 학술대회 논문집 Vol.2006 No.-
디젤엔진에서 배출되는 배기가스 중의 주요 오염물질 중의 하나인 NOx(질소산화물)는 대부분 고온의 연소 과정에서 발생하고, 발생량은 연소온도에 따라 결정되는 것으로 알려져 있다. 또한 연료의 연소 중에 물이 첨가되면 연소공기의 비열 증가에 의하여 연소온도가 감소하여 NOx 발생량이 급격하게 감소하게 되는데, 연소실에 물을 첨가하는 방법으로는 유화연료, 직접물분사, 흡기가습 등이 있다. 이중 흡기가습은 구조가 간단하면서 NOx 저감효율이 가장 높은 것으로 알려져 있다. 본 연구는 당사 고유모델 중형엔진인 힘센엔진에 흡기가습 기술을 적용하여 연소성능 및 NOx 저감효과 등을 시험하고, 흡기가습 시스템의 상용화 모델 개발을 위한 기초 데이터를 확보하기 위해 수행되었다.