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[論文] 酸化觸媒에 의한 自動車排出가스中 HC 및 CO의 淨化에 關한 實驗的 硏究
한영출(Young Chool Han),최규훈(Kyu Hoon Choi) 한국자동차공학회 1981 오토저널 Vol.3 No.1
This paper describes emission control of hydrocarbon and carbon-monoxide due to oxidizing catalyst.<br/> The experiment was performed on a precious metal pclleted catalyst (Pt).<br/> The factors of the efficiency for purification due to oxidizing catalyst are space velocity,<br/> temperature, composition of exhaust gas and supplemcntary air.<br/> The experiment was carried out to control the factors of efficiency for purification.<br/> The results of experimental study show that lempcrature of catalytic converter, supple-<br/> mentary air and space velocity affected the efficicncy for purification of hydrocarbon and carbon monoxide.
[論文] 高速디이젤機關의 粘性비틀림振動댐퍼에 關한 硏究
한영출(Young Chool Han) 한국자동차공학회 1982 오토저널 Vol.4 No.1
Recent diesel engine has achieved high speed running comparable to that of gasoline engine as a speed improvement effort.<br/> Consequently, torsional vibration of high-speed diesel engine induced vibration nosise, reduced horsepower and the like,<br/> Viscous damper which is thought to be effective in curtailing the torsional vibration was studied over a wide range of speed. In this investigation, a water cooling, 4-cycle high-speed die<br/> sel engine (Max. 3500 rpm) was used for the study.<br/> Theoretical analysis was made by assuming the engine to be an ideal equivalent system (Iength, moment of inertia) i.e.the multi-degree of freedom equivalent torsional vibration system with damper Was analyzed.<br/> In the analysis, the inertia moment of suitable damper for this experiment Was calculated by varying the relative damping coefficient of damper of engine for each damper. Furthermore, in<br/> the torsional vibration experiment, the torsional vibration amplitude of the crankshaft system was measured when the engine was equipped with dampers of different moments of inertia and<br/> also when the engine was equipped without dampers. The experimental results were compared with the analytical values and were found to be satisfied. The results of this investigation are summarizd below:<br/> (1) It was found that for the engine equipped with dampers, the torsional vibration amplitude was reduced to about one third of those without dampers.<br/> (2) The optimum value of inertia moment of viscous damper for the engine was found to be about Id=1.05 (kgㆍcmㆍs²)<br/> (3) The optimum damping coefficient and the ratio of moment of inertia for the engine were found to be about Cd≒850 (kgㆍcmㆍs), Rd=0.509, respectively(B1 dapmper).
[디젤엔진부문] 대형디젤기관에서 EGR 적용에 따른 배기가스 예측에 관한 연구
한영출(Young-chool Han),오용석(Yong-suk Oh),오상기(Sang-gi Oh),김정선(Jung-sun Kim),안균재(Kyun-jae Ahn) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In order to meet increasingly stringent emission standards, extensive research has been earned out to explore exhaust gas recirculation (EOR) to reduce NOx from diesel engines. Usually, reducing the oxygen concentration by EOR, however, results in a higher Smoke level.<br/> The effect of EOR on NOx and Smoke emissions in heavy duty diesel engine are studied numerically using a multi-dimensional code. Turbulent flows are simulated using the RNO k- ε model as a governing equation. For atomization, TAB and wave instability breakup are modeled. And using the Watkins-Park model and Zeldo'vich model, wall impingement, NOx and Smoke formation respectively. Effect of EOR on NOx and Smoke have been discussed in details<br/>
한영출(Young-Chool Han),김대열(Dae-Yeol Kim),문병철(Boung-cheol Mooo),윤득선(Deug-Sun Yoon) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.5_2
In this paper, automobile of voice warning system studied comparatively recoding on noised environment and recoding on recoding chamber for manufactured voice output card. Experimental results, voice simulator device using single device chip was obtained reduction of money and simple electronics of circuit by comparison with used voice warning device. And it showed that is audible different to comparison with recoding on noised environment or recoding on recoding chamber. In addition, it may be indicated that of numerical oder and picture, proposed to get variable results of voice output method using device.<br/> <br/>
[디젤엔진부문] EGR을 적용한 대형 디젤기관에서 NOx 생성예측에 관한 수치해석
한영출(Young-Chool Han),백두성(Doo-Sung Baik),오용석(Young-Suk Oh),김정선(Jung-Sun Kim) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The effect of exhaust gas recirculation (EGR) on NOx emissions in heavy duty diesel engine are numerically studied. Turbulence model is RNG k-?? as a governing equation. For atomization, TAB and wave instability breakup are modeled. And using the Watkins-Park model and Zeldo`vich model, wall impingement and NOx formation respectively. Effect of EGR on NOx have been discussed in detail.