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대체연료로서의 고점성 식물유의 분무 미립화에 관한 연구
강대운(D.W.Kang),주은선(E.S.Ju),정석용(S.Y.Jeong) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_2
In this paper, an experiment was conducted to figure out the atomization characteristics of rice-bran oil which is a high viscous fluid. For this study, an ultrasonic system, injection system, and six different nozzles(three kinds of single hole type nozzles, three kinds of pintle type nozzles) were made. To investigate effects of ultrasonic energy in a high viscous fluid. an immersion method and an phase doppler particle analyzer were used as method of measurement on droplets distribution. As results, droplets diameters of rice-bran oil were apparently decreased. by using ultrasonic energy more than not using it, according to rise nozzle open pressure and become more collection distance in the same experimental conditions.<br/>
PDPA에 의한 Pintle형 노즐의 미립화 특성실험 -식물유를 중심으로-
유병구(B.G.Yu),차경옥(K.O.Cha),정진도(J.D.Chung),주은선(E.S.Ju) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_1
An simplified experiment was performed to figure out the atomization characteristics of rice-bran oil which is highly viscous liquid by applying ultrasonic energy to improve the atomization of spray droplets. A spray system, an ultrasonic system, and three kinds of pintle-type nozzles(pin-edge angle: 5°, 10°, 15°)was manufactured. To investigate the effects of ultrasonic energy on the atomization of a highly viscous liquid, a phase doppler particle analyzer was used for measurement and calculation of spray droplets data. Nozzle opening pressures were chosen of 3 levels, i.e. 10. 13, and 16MPa. The improvement rate of the spray atomization by the ultrasonic spray atomization by the ultrasonic spray compared with the conventional spray was about 10% in the case of pintle type nozzles. With the increase of the nozzle opening pressure and pin-edge angle, the atomization of spray droplets was improved.<br/>
최우창,주은선,송민근,박영호 慶尙大學校生産技術硏究所 1998 生産技術硏究所論文集 Vol.14 No.-
A Study on size distributions of the liquid atomization by ultrasonic was carried out using 3 methods, such as direct vibration, aerosol and improvement method. Distilled water and city water were selected as the reference liquids and gasoline, kerosene and petroleum as fuel liquids. Two kinds of ultrasonic transducers, with 28kHz and 2MHz were used. Characteristics and phenomena on ultrasonic atomization were observed and examined relatively according to influx and liquid load by using the Malvern system. In results, The best uniformity of particle size was achieved by the direct vibration method, and their mean size was 10 times larger than that of the aerosol method.