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이중순,이태원,정성식,하종률 대한기계학회 1995 대한기계학회논문집 Vol.19 No.8
The experiment was performed by using the condenser discharge ignition device in a constant volume combustion chamber for high pressure, equivalent to the TDC of spark ignition engine, which makes the forced turbulent field possible. The conclusions obtained under various initial pressures, initial temperatures, and turbulent conditions of the methanol-air mixture are as follows : As initial pressure, initial temperature of the mixture, and the ignition energy increase, the inflammability limit expands, but the lean inflammability limit decreases as turbulence intensity increases. Combustion duration is shorter in the case of the lower initial pressure, the higher initial temperature, an equivalence ratio of 1.1-1.2, and even though turbulence intensity increases up to optimum value. Maximum combustion pressure increases in turbulent ambience under the same mixture condition, only in the case each optimum turbulence intensity exists under every condition. As the turbulence intensity increases .tau.$_{10}$ proportion increases while the .tau.$_{pr}$ proportion decreases....
이중순,이태원,이상석,하종률 대한기계학회 1995 대한기계학회논문집 Vol.19 No.9
We studied the effects on the ignitability of mixture, the combustion duration, and the maximum combustion pressure, of various initial combustion factors such as temperature, pressure, and each equivalence ratio in order to identify the combustion characteristics of lean mixture and improve ignitability through the proper control of the ignition energy. It is concluded that there is an optimum turbulent intensity that enables the combustion to have the best ignitability and the shortest duration under each equivalent ratio, and the combustion duration is only dependent upon the distribution and magnitude of discharge energy within the limit of inflammability.
분위기 조건이 직접분사식 인젝터의 미립화에 미치는 영향
이중순,Lee, J.S. 한국액체미립화학회 2001 한국액체미립화학회지 Vol.6 No.1
Several efforts to meet the exhaust gas regulation have been undertaken by many researchers in recent years. Main researches are on development of design techniques of intake port and combustion chamber, atomisation of fuel and precise control of air-fuel ratio, post-treatment of exhaust gas and so on. Engine technology is changed from PFI to GDI to correspond with exhaust gas regulation. GDI technique makes it possible to preserve lean air-fuel ratio and control accurate air-fuel ratio. Nevertheless, It is not cleared that information of spray characteristics and atomization process are very dependent on fluctuation of pressure and change of temperature in intake stroke. In this study, a constant volume combustion chamber is manufactured to investigate various fluctuations of in-cylinder pressure for injection duration. It is taken photographs of injection process of conventional GDI injector using PMAS. Then, it was verified experimently that ambient conditions as temperature and pressure of combustion chamber have effects on process of spray growth and atomization of fuel.
이중순,배종용,이태원,하종률 동아대학교 공과대학 부설 한국자원개발연구소 1994 硏究報告 Vol.18 No.1
Ignition devices used in electric ignition engine supply electric sparks with the air-fuel mixture intake into the cylinder and compressed, at the optimal time and enable the mixture to ignite and explode. It is critical, therefore, that the ignition energy be changed into more inflammable type, identifying constructions of the ignition energy and factors affecting on the inflammation by the energy. In order to accomplish this, CDI, SIS and MIS based upon the DLI system, in which high level ignition energy is supplied for the ignition plug directly from the ignition coil, have been developed and manufactured.
이중순,정성식,우정인,하종률 동아대학교 공과대학부설 생산기술연구소 1996 生産技術硏究所硏究論文集 Vol.1 No.-
The present work is to study the relationship between the flow and flame development in spark-ignited premixture especially under lean mixture conditions. The purpose of this rasearch is to develop a High Fequency Ignition System that can make powerful ignition. For this, the flow and initial flame interation in spark-ignited premixture was examined in a constant-volume combustion chamber with high frequency ignition system which controls the frequency of ignition and various discharge patterns. The results showed that the portion of capacitance energy to the total energy is comparatively larger and that the optimum spark interval and spark duration are dependent upon conditions of Constant Volume Combustion Chamber.
이중순,강병무,하종률,Lee, Jung-Sun,Gang, Byeong-Mu,Ha, Jong-Ryul 대한기계학회 1996 大韓機械學會論文集B Vol.20 No.1
For fuel economy and pollutant reduction, the interests in lean burn has increased recently. The purpose of this research is to develop a High Frequency Ignition System (HIS) that can make powerful ignition. We studied relations between performance of HIS and probability of inflammation under various ignition conditions. It is concluded that the portion of capacitance energy to the total energy is comparatively larger and that the optimum spark interval and spark duration are dependent upon conditions of Constant Volume Combustion Chamber.