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[論文] 代替燃料로서 가솔린-메타놀 混合燃料에 依한 가솔린機關性能과 排出汚染物에 關한 硏究
김희철(Kim Hi Chul),용기중(Yong Gee Joong) 한국자동차공학회 1981 오토저널 Vol.3 No.2
The purpose of this paper is to study the possibility of practical Use of gasoline-methanol mixed fuel as an alternative fuel of gasoline engines jn the light of engine performances and harmful exhaust emissions as well as mixings and separations of the mixed fuels.<br/> When the methanol of 99.8% purity is mixed with super or regular gasoline available on the market today, the experimental results obtained without modifying carburetor in this study are as follows;<br/> 1. The separation ratio depends upon the gasoline-methanol mixing ratio only, regardless of fuel temperature and fuel additives for preventing separation of phase.<br/> 2. The critical absorption ratio is affected by the gsoline-methanol mixing ratio, its temperature and the quantity of fuel additives.<br/> 3. Concerning the distillation temperature, the initial point of all sorts of fuels is almost same, but 10% point and 35-60% point of mixed fuels are lower than those of gasoline only.<br/> 4. In case of throttle valve opening set, engine output using the mixed fuels is decreased compared to gasoline, but thermal efficiency is increased as a consequence of decreasing speci-<br/> fie energy consumption.<br/> 5. In case of fixed load test, thermal efficiency is increased at low engine speed even under low part-load as well as under comparatively high part-load including full load.<br/> 6, CO and NOx emissions are reduced remarkably with the mixed fuels.
조한중(Cho Han-Jung),김희철(Kim Hi-Chul),서정윤(Seo Jeong-Yun),조용철(Cho Yong-Chul) 한국태양에너지학회 1991 한국태양에너지학회 논문집 Vol.11 No.3
본 연구는 주어진 기름노즐의 분무특성을 실험적으로 조사하고 아울러 적정 가동조건을 설정하기 위하여 수행하였다. 실험에 공시한 노즐은 Devalvan과 Hago(압력분무 Simplex 1.25GPH)로서 각종 압력하에서 분무 각 60°와 80°에 대하여 조사하고 분무특성을 기술함에 있어서는 사우터 평균입경의 개념을 사용하였다. 포집된 모든 분무입자는 고감도 필름을 사용하여 50배로 확대 촬영하고, 이들을 Nukiyama-Tanazawa의 분포함수를 도입하여 해석하였다. 결론적으로 80°의 경우가 60°의 경우보다 분무특성이 양호하며, 적정 가동조건은 분무압 8㎏/㎠ 부근에서 정착됨을 알 수 있었다. The purpose of the present work is to investigate the atomization characteristics and to find the available working conditions of given nozzles. Experimental investigations were carried out with the nozzles, "Delavan" and "Hago"(pressure atomizing simplex 1.25GPH), with 60° and 80° spray angles also at various nozzle pressures.<br/> In the present work, Sauter mean-diameter was utilized to describe the quality of the atomization. All sample droplets were microphotographed with high-contrust film at 50X magnification and analyzed by Nukiyama-Tanazawa distribution function.<br/> The 80° spray angle gives better atomization function than 60° spray angle, and available working conditions were set at approximately 8㎏/㎠ nozzle pressure.