| 제목 |
엔진 유동장에서 분사시기에 따른 혼합기의 기·액상 농도 분포에 관한 연구 |
| 분야 |
열유체 및 공조시스템(HVAC) |
| 언어 |
Korean |
| 저자 |
김덕줄(부산대학교), 최동석(부산대학교), 김한재(부산대학교) |
| Key Words |
Spray characteristics(분무특성), Optically accessible engine(가시화엔진), Exciplex fluorescence method(Exciplex 형광법), Fluorescence intensity(형광강도), Injection timing(분사시기) |
| 초록 |
The present study experimentally investigates the concentration distribution of liquid and vapor phase with different injection timings in the in-cylinder flow field of a optically accessible engine. The conventional MPl, DOHC engine was modified into DI gasoline engine. The images of liquid and vapor phases in the motoring engine were captured by using exciplex fluorescence method. Dopants used in this study were 2% fluorobenzene and 9% DEMA(diethyl-methyl-amine) in 89% solution of hexane by volume respectively. Two dimensional spray fluorescence images of liquid and vapor phases were acquired to analyze spray behaviors and fuel distribution in the in-cylinder 리ow field. Measurements were carried out for four different injection timings, namely BTDC 270°, 180°, 90°, and 50°. Experimental results indicate that behaviors and distribution of vapor phase were largely affected by in-cylinder tumble flow. and mixture formation process was also greatly affected by in-cylinder flow at early injection mode and by ambient pressure at late injection mode. |
| 원문(PDF) |
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