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급속압축장치에서 탄소 나노입자가 첨가된 연료 액적의 증발 및 연소 특성에 관한 실험적 연구
안형진(Hyeongjin Ahn),Botchu Vara Siva Jyoti,백승욱(Seung Wook Baek) 한국연소학회 2016 한국연소학회지 Vol.21 No.2
Evaporation and combustion characteristics of fuel droplet with carbon nanoparticle were investigated in a rapid compression machine(RCM). RCM is an experimental equipment to simulate one compression stroke of reciprocating engine. Nitrogen was charged into reaction chamber for evaporation experiment, while oxygen was charged for combustion experiment. N990 carbon black and n-heptane were used to synthesize the carbon nanofluids. Surfactant, span80, was used to make synthesis easier. The droplet pictures were taken using a high speed camera with 500 frames per second. Thermocouple, of which tip is 50 μm, was used not only to measure transient bulk temperature, but also to suspend the droplet. Reaction chamber temperature was calculated from pressure data. The evaporation rate of nanofluids was improved compared to pure fuel. The ignition delay was promoted due to the nanoparticle, but the burning rate was decreased.