| 제목 |
CARS 측정 기술을 이용한 스파크 점화 기관에서의 화염 전 화학 반응에 의한 온도 변화에 관한 연구 |
| 분야 |
열유체 및 공조시스템(HVAC) |
| 언어 |
Korean |
| 저자 |
최인용(University of Michigan), 박철웅(한국표준과학연구원), 전광민(연세대학교), 한재원(한국표준과학연구원) |
| Key Words |
Knocking(노킹), autoignition(자발화), CARS(코헤런트 반 스톡스 라만 분광법), End gas temperature(말단 가스 온도), Pre-flame reaction(화염 전 화학 반응) |
| 초록 |
End-gas temperatures were measured using CARS technique in a conventional DOHC spark- ignition engine fueled with PRF80. The measured pressure data were analyzed using band pass filter method. The measured CARS temperatures were compared with adiabatic core temperatures calculated from measured pressures. Significant heating by pre-flame reaction in the end gas zone Was observed in the late part of compression stroke under both knocking and non-knocking conditions. CARS temperatures measured at 10 crank angle degree before knock occurrence Was higher than adiabatic core temperatures. These results indicate that there exist some exothermic reactions in low pressure and temperature region. CARS temperatures began to be higher than the adiabatic core temperature when the end-gas temperatures reached 700K. The temperature elevation due to the pre-flame reaction correlated better with CARS temperature than with cylinder pressure. |
| 원문(PDF) |
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