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소형 직접분사식 디젤기관에 있어서 신ㆍ구 노즐의 분무 및 배기특성 비교연구
임상호(Sang-Woo Lim),고성정(Seoung-Jung Ko) 한국해양대학교 해사산업연구소 2003 海事産業硏究所論文集 Vol.13 No.-
A Diesel engine is widely used for power source of ship and industry owing to its high thermal efficiency and reliability and durability. However it leads to air pollution due to exhaust gas, and it is important to develop the diesel engine of lower air-pollution to decrease the hazardous exhaust gas emissions. In the latest of diesel engines more efforts have been made on the lower fuel consumption and the reduction of exhaust emission. Especially, in diesel engines, the atomization and injection conditions in related to the exhaust gas have to minimize its harmful components. The atomization characteristics of fuel injection nozzles of D.I. diesel engine have been the subject of intensive study over the last decade. Experience shows that the fuel injection nozzles may foul very rapidly in field service, and that this might have a significant effect on the performance of the engine with regard to emissions. The purpose of this experiment is to predict the fuel injection conditions from new and used nozzles. From new and used nozzles we analyze the conditions of pressures in cylinder, exhaust gas, spray shape. On the basis of these data, the heat release rate, exhaust gas, spray and performance of this engine are analyzed. And then variation of new and used nozzle combustion characteristics are investigated from each test conditions.
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