http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이창식(Chang-sik Lee),최수천(Soo-chun Choi),김민규(Min-kyu Kim) 한국자동차공학회 1999 한국 자동차공학회논문집 Vol.7 No.8
An experimental study was carried out to investigate the global spray behavior and spray characteristics of high-pressure fuel injector in the direct-injection gasoline engine.<br/> The atomization characteristics of fuel spray such as mean droplet size, mean velocity, and velocity distribution were measured by the phase Doppler particle analyzer. The spray tip penetration and spray width were investigated by the result of visualization experiment. The quantitative spray characteristics of injector spray were measured under various spray conditions and ambient pressures. The results of experiment show that the increase in ambient pressure have influence on the spray tip penetration and spray development processes. Also, the influence of injection pressure and measuring location on the mean velocity and droplet size distribution were discussed.
흡기 유동 조건의 변화가 실린더 내 가스 유동 패턴에 미치는 영향
이창식(Chang-sik Lee),전문수(Mun-soo chon),김우경(Woo-kyoung Kim),최수천(Soo-chun choi) 한국자동차공학회 1999 한국 자동차공학회논문집 Vol.7 No.8
This paper presents the characteristics of the gas flow in the engine cylinder under various intake flow conditions. The particle tracking velocimetry(PTV) was used to analyze the gas flow pattern and flow field in the cylinder. Effects of tumble intensifYing valve(TIV), swirl intensifYing valve(SIV), and one-valve deactivated condition on in-cylinder flow patterns were compared with the baseline engine under 600rpm motoring condition. In addition, tumble ratio was estimated with results of in-cylinder flow fields. Base on experimental results, the tumble ratio of in-cylinder flow field has the maximum value at the bottom dead center for the different four inlet conditions. In TIV condition, the tumble ratio is 1.35 times larger than that of baseline engine and I intake valve deactivated condition is effective to improve in-cylinder swirl motion.<br/>
[가솔린엔진부문] 가솔린 분무 거동에 미치는 분위기 조건의 영향
이창식(Chang-sik Lee),이기형(Ki-hyung Lee),최수천(Soo-chun Choi),권상일(Sang-il Kwon) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_1
The main objective of this work is to investigate the effect of ambient conditions on the spray behavior and spray characteristics of high-pressure fuel injector for the direct-injection gasoline engine, For this purpose ‘ the effects of ambient pressure and temperature on tile spray characteristics have been studied by applying the analysis of visualization system and phase Doppler panicle analyzer. In this experiment, the visualization of spray behavior was performed under various ambient gas conditions and injection parameters such as gas temperature. ambient pressure ‘ injection pressure of injector. and axial distance from the nozzle tip.<br/> Based on the investigation results, the spray tip penetration and spray width decrease in accordance with the increase of ambient gas pressure in the spray chamber, The effects of the other parameters on the microscopic characteristics of gasoline spray were discussed, and the droplet mean size of fuel spray is shown on the basis of experimentally obtained results
이창식(Chang-sik Lee),이기형(Ki-hyung Lee),최수천(Soo-chun Choi),권상일(Sang-il Kwon) 한국자동차공학회 2000 한국 자동차공학회논문집 Vol.8 No.2
The main objective of this work is to investigate the effect of ambient conditions on the spray behavior and spray characteristics of high-pressure fuel injector. For this purpose, the effects of ambient pressure and temperature on the spray characteristics have been studied by applying the analysis of visualization system and phase Doppler particle analyzer. In this experiment, the visualization of spray behavior was performed under various ambient gas conditions and injection parameters such as gas temperature, ambient pressure, injection pressure of injector, and axial distance from the nozzle tip.<br/> Based on the investigation results, the spray tip penetration and spray width decrease with the increase of ambient gas pressure in the spray chamber. The effects of the spray parameters on the microscopic characteristics of gasoline spray were discussed.<br/>