http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
장창수(Changsoo Jang),이명숙(Myoungsook Lee),최광제(Gwangje Choe),노영록(Youngroc Rho) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_2
In this paper, we present an experimental study on the radiating source of electro-magnetic wave in the cabin of automobile. It is deduced that some part of the electro equipment in automobile generate an electro-magnetic wave, which can be considered as one of extra sources. The levels of the radiated electro-magnetic wave distributed in the cabin and engine room are calculated by measuring the spectrum, respectively. The measured frequency range is 145 to 365㎒. The experimental results show that the level of the radiated electro-magnetic wave in the cabin of automobile with automatic transmission is lower than that in the engine room. However, the spectrum wave-forms are almost similar. It is also shown that. comparing lots of the radiated electro-magnetic wave in the cabin of automobile with automatic transmission, the one with manual transmission hardly exists. From the experimental studies, it can be concluded that the high voltage cables in the cabin of automobile with automatic transmission generate the electro-magnetic wave.
[가솔린엔진부문] 전산유체역학의 고압선회식 분사기 노즐부 내부유동해석 및 노즐설계에의 적용
장창수(Changsoo Jang),최상민(Sangmin Choi) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Although it has many limitation and defects of its own, a CFD approach is an effective way for investigation and prediction of fluid flow, especially for small injector nozzle flow owing to complexities and difficulties of the test nozzle fabrication process and flow measurements. In this study the internal flow of a high pressure swirl injector nozzle was investigated using a CFD tool. The formation of an initial solid jet spray and the irregular pattern at early period of a spray were explained through the interpretation of transient calculations. A method of manipulating the orifice geometry was proposed for enhancing the spray cone angle of the HPSI without swirl momentum control. A diverging orifice and a smaller orifice diameter plate were found to be the effective ones for this purpose. As an example of practical applications, cause identification of spray defects was presented. The results showed that the internal flow calculation could be utilized in nozzle and spray pattern design.