http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
진동형 분진 최소착화에너지측정장치에서 분진 응집현상이 미치는 영향
정재희,최충석,목연수,최광석,황명환,우인성,Yamaguma, M.,Kodama, T.,Cheung, W.L. 한국산업안전학회 1999 한국안전학회지 Vol.14 No.3
It is widely recognized that Hartmann tube for measuring the minimum ignition energy(MIE) of powder. But It requires long time and operational skills for measuring. As a variety of new fine powders are being produced day by day in industry, Japen has been developing a measurement system which employs a new method to create a dust/air mixture in a miniature combustion box. In this system, by vibration, the powder is successively fed downward through a hopper made up of metal mesh, and then it is formed into a thin, certain-like, dust/air mixture. With this new apparatus, three types of powder-Lycopodium, Anthraquinone, and Polyacrylonitrile-were tested and the data of MIE were compared with those of a conventional apparatus (the Hartmann tube). Two of them agreed satisfactory, but the other, Anthraquinone, showed quite different values. It is guessed that the agglomerations of the powder particles appear because of particle shapes, static-charge and humidity.
코로나 대전된 복합절연재료의 표면상태가 전위감소에 미치는 영향
황명환,정재희,조한구,송진호,이덕출 한국산업안전학회 1997 한국안전학회지 Vol.12 No.2
Especially, Fiber glass Reinforced Plastics(FRP) is the best composite insulating material which has been so far. Therefore, it's worthy of notice to investigate on the corona electrified composite insulating material by surface condition. And then some other materials will be focussed on. In this study, charge decay were measured with charging-time and grid voltage on FRP composite material surface in order to analyze the mechanism. As a result we have studied that the way of the composite glass fiber(GF) and Polymer and the condition of the contaminated surface was different. In case of the GF is mixed with vertical, charge decay speed is fast because the charge is easily leaked. On the other hand, the surface charge decay speed is depend on conductive or insulated of the contaminant.
유동대전에 의한 절연유중의 정전기 방전기구와 대책에 관한 연구
이덕출,박광현,임헌찬,김두식,황명환,육재호 한국산업안전학회 1993 한국안전학회지 Vol.8 No.2
In this paper, it is studied the electrostatic discharge in insulating oil for the purpose of the technical control of the streaming electrification resulted frown the interface between an insulating liquid and a solid. The streaming current increases exponentially with flow rate and in region of lower than 50[℃] but decreases at higher than the same temperature. The phenomena of electrostatic discharge appear at an interface between measuring tank and insulating oil when the seven sheets of gauzos are inserted in electrification apparatus. And those of partial or surface discharge are shown when eight sheets are inserted.