급속압축기에서 노말헵탄/노말부탄올 혼합연료의 점화지연 특성에 배기가스 재순환이 미치는 영향
Effect of Exhaust Gas Recirculation on Ignition Characteristics of N-heptane/N-butanol Blend Fuels in Rapid Compression Machine
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The autoignition characteristics of n-heptane/n-butanol were investigated both experimentally and numerically. The effects of oxygen concentration and exhaust gas recirculation rate on the autoignition characteristics were evaluated. A rapid compression machine was employed to measure ignition delay times of blended fuels. A numerical study on the ignition delay time was performed using the CHEMKIN-PRO software to calculate ignition delay time and predict the chemical species in the combustion process. The results revealed that the ignition delay time increased with decreasing oxygen concentration due to the thermal load effect of nitrogen. The oxidation reaction of n-heptane in a low temperature regime was limited with decreasing oxygen concentration. The ignition delay time sharply decreased with exhaust gas recirculation because of theintermediate species in the exhaust gas. Exhaust gas recirculation reduced first ignition delay dramatically. However, the time interval between the first and main ignition increased with increased exhaust gas recirculation.
Abstract
The autoignition characteristics of n-heptane/n-butanol were investigated both experimentally and numerically. The effects of oxygen concentration and exhaust gas recirculation rate on the autoignition characteristics were evaluated. A rapid compression machine was employed to measure ignition delay times of blended fuels. A numerical study on the ignition delay time was performed using the CHEMKIN-PRO software to calculate ignition delay time and predict the chemical species in the combustion process. The results revealed that the ignition delay time increased with decreasing oxygen concentration due to the thermal load effect of nitrogen. The oxidation reaction of n-heptane in a low temperature regime was limited with decreasing oxygen concentration. The ignition delay time sharply decreased with exhaust gas recirculation because of theintermediate species in the exhaust gas. Exhaust gas recirculation reduced first ignition delay dramatically. However, the time interval between the first and main ignition increased with increased exhaust gas recirculation.
참고문헌 (11)
- X. Lu, "Fuel design and management for the control of advanced compression ignition combustion modes", Progress in Energy and Combustion Science, 37(6), pp.741~783 (2011)
- M. Yao, "Homogeneous charge compression ignition (HCCI) combustion:Implementation and effects on pollutants in direct injection diesel engines", Progress in Energy and Combustion Science, 35(5), pp.398~437 (2009)
- A. Naidja, "cool flame partial oxidation and its role in combustion and reforming of fuels for fuel cell systems", Progress in Energy and Combustion Science, 29(20), pp.155~191 (2003)
- M. Zheng, "Biodiesel engine performance and emissions in lowtemperature combustion", Fuel, 87(6), pp.714~722 (2008)
- H. Ogawa, "Characteristics of low temperature and low oxygen diesel combustion with ultrahigh exhaust gas recirculation", International Journal of Engine Research, 8, pp.365~378 (2007)
- J. Zhang, "Experimental and modeling study of the autoignition of n-heptane", n-butanol mixtures, 2013, pp.160(1), 31~39
- P. Dagaut, "Experimental and modeling study of the kinetics of oxidation of butanoln-heptane mixtures in a jet-stirred reactor", Energy & Fuels, 23(7), pp.3527~3535 (2009)
- D. Karwat, "On the combustion chemist- ry of n-heptane and n-butanol blends", The Journal of Physical Chemistry A, 116(51), pp.12406~12421 (2012)
- 강기중, "A Study on the Heat Transfer Characteristics of a High Velocity Impinging Inverse Diffusion Flames", 한국기계기술학회지, 12(4), pp.11~16 (2010), 한국기계기술학회
- K.S Park, "A study on the combustion characteristics of methanol diesel blended fuel 2", Journal of Korean Society of Mechanical Technology, 5(2), pp.151~159 (2003)
- "Reaction Design"[URL]