http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
A Study on Generation of Negative Oxygen Ions Using Surface Dielectric Barrier Discharge
Jae-Ou Chae(채재우),Menglei Zheng(정맹뢰),Wei Wei(위위),Xinhong Chen(진신홍),Hui Wang(왕혜),Yong-Hwan Kwak(곽용환) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
Nowadays, ionizers are used very popular for producing negative oxygen ions, which is good for human being health. However, most of the ionizers in the present market are using needle-plate structure in which corona discharge occurs. Comparing with corona discharge, surface discharge is much more compact in the configuration and produces less ozone. For the purpose of finding out the best reactor structure, four types of surface dielectric barrier discharge (DBD) reactors were examined to produce negative oxygen ions at the conditions of 4.24 ㎸ and 356 ㎐. Then influence of frequency (50 ㎐ to 400 ㎐) on the performance of this reactor was also examined on keeping operation voltage and waveform in constant. The results indicated that the surface DBD reactor showed better characteristics for generation of negative oxygen ions when frequency was between 100 ㎐ and 200 ㎐.
WAVE REGIMES OF CREEPER ELECTRIC BREAKDOWN ON POLYMER SURFACES
Jae-Ou Chae,Young-Sik Jeong 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The creeper electric breakdown (CEB) is caused by low current discharges on humid and dirty surfaces of polymer plastic parts in electric fields. As a result of carbon channels, regular and dendritic carbonized structures grow on the polymer surface slowly and electric and heat transfer properties of the surface are broken. This phenomenon is important for automotive engineering because different kinds of polymer materials. are used for production and operation in strong electric fields and humid ambient atmosphere today. The experimental study of GEB's wave regimes was carried out. Main dependences of the growth velocity on the discharge current, configuration of electrodes, type of polymer, oxygen<br/> concentration in the ambient atmosphere, heat transfer conditions were found. In the case of dendritic regimes<br/> of the CEB, the fractal dimension (D) of the carbonized structures was found to be equal to 1.6 - 1.9. The average length (L) of structures increased according to the law L - tf , where t<br/> is the growth time and f = 0.55 - 0.7. The fractal dimension was connected with f by the equation f = 1/0.<br/>
The Latest Development of Technology for Engine Emission Control
Chae Jae-Ou,Li Jianwen 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_2
This paper introduces the latest development of technology for engine exhaust emission control. Some new combustion systems for indirect injection gasoline engines are presented and the<br/> development and features of metallic catalytic converter are explained.<br/> <br/>
Regeneration of Diesel Particulate Filter (DPF) using Ozone
Jae-ou Chae(채재우),Xin-hong Chen(진신홍),C. Purushothama(푸루소타마),Rui-qiang Liu(류서강),Ming-wei Li(이명위) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Recent years, automotive diesel engine emission standards become very strict, and it is hard to fulfill them just by using the current techniques of improving combustion. Therefore, the ceramic diesel particulate filter (DPF) is widely used for collecting soot from the exhaust gas of diesel engine. However, the DPF need being regenerated after the soot accumulation. This research deals with regeneration of the DPF using ozone, which comes from surface discharge occurred in a dielectric barrier discharge reactor. Pure oxygen was introduced into the reactor, and was discharged to form much activated species, including ozone and monatomic oxygen. When pure oxygen of 4 L/min at a temperature of 443 K is passed to the DPF through plasma reactor which is energized by 100 W for two hours, it has found a decrease in weight of soot by 2 grams. Comparing with the regenerating method via NO₂, the method using ozone is much friendlier to the environment, because ozone is very unstable.