http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김원호(W. H. Kim),강유리(Y.L. Kang),김성준(S. J. Kim),이광학(K. H. Lee),김철우(C. U. Kim) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
With the increasing demands for clean environment, development of air cleaning systems has been received increasing attention.<br/> Pulse power systems are widely used for air cleaning in the industrial applications. high voltage pulse power supply affects the performance of the overall environmental system<br/> In this study, high voltage micro pulse power supply for removing NOx in diesel engines is developed.<br/> The ratings of the pulse voltage is 20kV. The pulse width is 10usec and max. pulse repetition ratio is 1kHz.
송민철(M. C. Song),박덕수(D. S. Park),이명규(M. G. Lee),이광학(K. H. Lee) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.10
The TR forging is a kind of continuous grain flow forging. The preform of crank shaft for TR forging process was a round bar with a ring groove. In the first stage, the preform was partly heated by induction heating and then forged by vertical and horizontal force in sequence. In this study, the simulation process of induction heating was proposed to evaluate the temperature distribution of preform for TR forging. The equivalent circuit method was adopted to fine coil current of the preform with a various dimensions and power levels. With these results, the coupled electromagnetic and transient thermal analysis for induction heating was performed to evaluate the temperature distribution at the preform of crank shaft during induction heating process. This FE analysis technique with equivalent circuit method was verified by comparing the analysis results with the experimental results.
김영홍,이광학 울산대학교 1982 연구논문집 Vol.13 No.2
CaO-MgO-SiO₂, CaO-Al₂O₃-SiO₂ 및 Cao-MgO-Al₂O₃-SiO₂계 slag의 탈황능력을 1500℃에서 CO, CO₂, SO₂ 및 Ar의 혼합가스를 이용하여 측정하였다. CaO-MgO-SiO₂계 slag에 MnO첨가시 slag의 탈황능력에 미치는 영향과 탄소포화철과 slag간의 탈황반응속도에 미치는 영향을 조사하였다. MnO를 첨가한 경우를 제외하고는 slag의 탈황능력은 slag의 조성비율, R= N??+N/2??/N??+N/3??(Bell식)에 밀접한 관계를 갖는다는 것이 확인되었다. 또한 slag에 MnO를 첨가하면 탈황능력은 첨가량에 비례하여 증가하며 slag에 의한 metal의 탈황반응속도 역시 반응초기에는 빨라진다. 그러나 탈황반응이 진행됨에 따라 MnO의 첨가량이 많을수록 탈황반응속도는 급속히 감소하고 slag/metal간의 S의 평형분배비율도 낮게 나타난다. Sulphide capacities, wt%S(Po₂/Ps₂)??, have been measured for the systems CaO-MgO-SiO₂, CaO-Al₂O₃-SiO₂ and Cao-MgO-Al₂O₃-SiO₂ at 1500℃, using gas mixture of CO, CO₂, SO₂ and Ar. and the effects of MnO addition to the slag Cao-MgO-SiO₂ on the sulphide capacity and the rate of desulphurization of C-saturated iron by the slag have also been studied. It is conformed that sulphide capacities of the slags except MnO addition are correlated closely with the composition ratio, R=N??+N/2??/N??+N/3?? (Bell's equation). The results show that MnO addition to the slag increase the sulphide capacity and the fast initial desulphurization rate of the iron by the slag proportionally with the amount of MnO added, but after the initial period of desulphurization the rate slows down more rapidly with a higher MnO addition, giving a much lower sulphur partition ratio at the end of reaction.
백영현,이광학 대한금속재료학회(대한금속학회) 1985 대한금속·재료학회지 Vol.23 No.2
In surface reactions in which one solid is converted to another by means of oxidation or reduction, geometric factors reflect themselves in the kinetic pattern followed. Geometric factors are helpful in that by correlating the surface reactions with geometry equations it is possible to determine the direction of diffusion of the reactive species through the product layers. In this study iron sinters were oxidized in oxygen atmosphere to wu¨stite. The sinter is composed of many spherical iron grains which is subjected to individual oxidation. Results of these studies indicate that ferrous ions do diffuse outwardly and react with oxygen on the outer surface and in all cases, the geometric model correlates the kinetic data observed. The activation energy thus obtained was found to be about 31 Kcal/mole which corresponds to the activation energy of diffusion of Fe^(++) ion in wu¨stite matrix. It is also noteworthy that the intergrain diffusion of oxygen plays on important role in the oxidation rate.