한국연소학회:학술대회논문집
- 한국연소학회 2000년도 제20회 KOSCO SYMPOSIUM 논문집
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- Pages.85-92
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- 2000
CARS 를 이용한 스파크 점화 기관에서의 화염 전화학 반응에 의한 온도 변화에 관한 연구
A Study of the Temperature Elevation Due to the Pre-flame Reaction Using CARS
- 발행 : 2000.05.26
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 pressure. Significant heating by pre-flame reaction in the end gas was observed in the late part of compression stroke under both knocking and non-knocking condition. 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 700 K. The temperature elevation due to the pre-flame reaction correlated better with CARS temperature than with cylinder pressure.