경유와 바이오 디젤의 단일 액적에 대한 자발화와 미소폭발

다국어 초록 (Multilingual Abstract)

The auto-ignition and micro-explosion characteristics of diesel and bio-diesel have been investigated experimentally. A single droplet of these fuels were suspended and heated in a chamber electrically varying droplet size, ambient temperature, and mixing ratio . The fuels used were diesel with bio-diesel whose contents varied from 0% to 100%. Each experiment has been performed at a certain high temperature ranged from 970K to 1070K by 50K intervals. Direct photographs of combustion process with a high-speed digital camera were analyzed to confirm the ignition delay and flame life-time as well as to observe micro-explosion behavior. Pure bio-diesel showed the faster ignition behavior than diesel fuel. The ignition delay increases as the bio-diesel content decreases for same droplet size and surrounding temperature. As the droplet size increases or the furnace temperature decreases, the ignition delay time increases regardless of fuel mixing ratios. The micro-explosion behavior is not found for the case of pure bio-diesel. As the bio-diesel content decreases, the occurrence timing of micro-explosion seems to be shortened.