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주은선(Eun Sun Ju),송민근(M.G.Song),최우창(W.C.CHoi),박영호(Y.H.Park) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_1
The application of the ultrasonic atomization has been extended because of its good merits. Influx, liquid load, and physical properties are the effecting factors to the size of spray droplets. In this study, distilled water and city water are selected as reference liquids and gasoline, kerosene, and petroleum as fuel liquids. Characteristics and affinity to get the maximum effect for the ultrasonic atomization are observed by using the two ultrasonic transducers with 28KHz and 2MHz.<br/> Results show that the size distributions of liquid spray droplet by direct vibration method prevail over the aerosol method in uniform droplet size and as a whole, liquid droplet sizes and spray quantum are decreasing according to the head increasing.<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.
초음파 적용 상온연무기용 2-유체 노즐의 분무입경 측정
나우정,주은선,정진도,송민근,이경열 경상대학교 농업생명과학연구원 2001 농업생명과학연구 Vol.35 No.-
상온연무기의 연무입자의 미립화에 대한 초음파 에너지의 효과를 구명하기 위하여 상온 연무기용 2-유체 노즐에 초음파 비가진 시의 상용분무, 분무노즐에 초음파 진동을 기계적 진동으로 주는 간접진동분무, 초음파를 분무액체에 직접 가하는 개질분무, 간접진동분무와 개질분무를 동시에 가하는 간접진동 및 개질법 겸용분무에 대하여 입경을 측정하였다. 분무방향 축과 반경방향 전 영역에 걸쳐서 사우터 평균지름(Sauter's mean diameter)을 측정한 결과 초음파 비가진 시인 상용분무시의 입경이 가장 크게, 간접진동 및 개질법 겸용의 경우가 가장 작게 나타났다. To figure out the effect of ultrasonic energy on the atomization of spray droplets from a twin-fluid nozzle used for cold-fog machine, spray droplets were measured according to the four experimental conditions; conventional spray where no ultrasonic energy is added, indirect vibration method where ultra vibration is added to the body of nozzle, liquid-property-change method where ultrasonic energy is added directly into the spray liquid, and combined addition method where indirect vibration method and liquid-property-change method are applied simultaneously. For all the regions according to the distance from the nozzle tip and for all radial regions, the poorest atomization was observed for the conventional spray condition and the best atomization was observed for the combined method conditions.