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류정인,정명진 충남대학교 1991 論文集 Vol.14 No.1
This paper deals with a fundamental study on applying low grade fuel oil to diesel engine. Experiments wee carried out to clarify the effect of ultrasonic vibrations on the characteristics of kinematic viscosity, structure, volatility of low grade fuel oil. The results are obtained as follows : 1. The ultrasonic vibrations of low grade fuel oil result in the decrease of kinematic viscosity of low grade fuel oil. 2. The ultrasonic vibrations of low grade fuel oil result in the Branchness Index of low grade fuel oil. 3. The ultrasonic vibrations of low grade fuel oil result in the lowering evaporated line of low grade oil.
류정인,최두석 충남대학교 공업교육연구소 1982 論文集 Vol.5 No.2
The whole world is troubled because of the international oil shocks of 1974 and 1979 and because of the worry of future oil exhaustion. In these days of endeavoring to reduce oil consumption and to control air pollution from automobile exhaust emissions, this study sought means to improve the volatility of gasoline with methanol and ethanol through the use of a preheated cooling medium. The results were as follow: 1) Generally the volatility increased with gasoline blends. 2) Also the volatility increased with a preheated cooling medium. 3) It is obtained to sensitivity of volatility to manufactured equilibrium air distillation apparatus.
류정인 忠南大學校 産業技術硏究所 1987 산업기술연구논문집 Vol.2 No.1
An optimum ultrasonic atomizer has been manufactured to increase fuel atomization rate and obtain fuel fine droplet size which are the major engine performance increasing factor in gasoline engine. New atomizer and commercial carburetor have been installed in test gasoline engine and followings are the result of the performance test. 1) Fuel size of new atomizer has been less than 4% of commercial carburetor. 2) Fuel atomization rate has been increased 25-40% at same AF ratio. 3) BMEP was similar to the commercial carburetor at same operating condition but lean combustion range can be extended up to AF ratio of 35 : 1. 4) BSFC has been decreased 40%-50% at same operating condition. 5) CO and HC emissions of new atomizer has been reduced to less than 5% of the commercial carburetor at same operating condition.
류정인 한국자동차공학회 1989 오토저널 Vol.11 No.5
본 고에서는 현재 이용되고 있는 초음파 발생법의 원리와 특징, 진동자의 설게법 및 진동의 확대법 horn의 설계 등을 다루어 내연기관 기술자가 직접 이용할 수 있도록 개설하여 액체의 미립화를 마감하고자 한다.
한근희,정진도,류정인 忠南大學校 産業技術硏究所 1995 산업기술연구논문집 Vol.10 No.1
The erosion characteristics of heat exchanger tube submerged in bubbling fluidized bed were investigated in a cold model reactor which had a cross sectional area of 0.15×0.2m and a height of 1m. The bed materials were two different sizes of river sand with the average diameter of 0.731 and 1.243mm. The static bed height was 45cm. The wear specimens were made of acrylic tube with a diameter of 24.6mm and a length of 150mm. Test tubes were located inside the bed with three tubes in a low at 15, 30, 45cm and with a single tube at 60cm above distributor plate. Test was performed with the variation of fluidization velocity of 1.2 to 2.2m/s for 100 hours per set. The test was performed ti investigate the effects of fluidization velocity, array of tubes, distance above distributor plate on the erosion rate, and the erosion trend of tube surface with radial and axial direction. The results showed that the erosion rate increases with fluidization velocity and with distance above the distributor plate. The erosion was severe at the tube located in the splash zone of 60cm above the distributor. the trend with radial direction showed severe erosion at the 4-8 o'clock clockwise compared to other areas, especially 5 and 7 o'clock clockwise.