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김재덕(Jaeduk Kim),적무림(Maolin Zhai),김형곤(Hyunggon Kim),정재연(JaeYoun Jung),송규근(Kyukeun Song) 한국자동차공학회 2012 한국자동차공학회 지부 학술대회 논문집 Vol.2012 No.5-2
An experimental study was conducted to examine the effect of injection pressure and fuel type on the spray tip penetration length of spray injected into atmospheric chamber. The objective of the present study is to formulate empirical correlations of the spray tip penetration for non-evaporative condition. The experiment was performed by a common rail type high-pressure injector for the diesel engine at the injection pressure 40 - 100 MPa and four different fuels (D100, BD25, BD45, and BD65). The results showed that the biodiesel content increased the spray tip penetration. The correlation of spray tip penetration is expressed for each region before and after spray break-up time in terms of injection pressure, fuel viscosity and time after start of injection.
김형곤(Hyunggon Kim),김재덕(Jaeduk Kim),적무림(Zhai Maolin),정재연(Jaeyoun Jung),송규근(Kyu-Keun Song) 한국자동차공학회 2012 한국자동차공학회 지부 학술대회 논문집 Vol.2012 No.5-2
Investigation of atomization characteristics between kerosene and vegetable oil spray was carried out. Kerosene and vegetable oil spray are produced by effervescent atomizer with separated air chamber in this study. To examine microscopic atomization characteristics including drop size distribution and SMD, LDPA was employed. During the experiments, the volume flow rate of working fluids was kept constant at 0.1g/s, and the ALR was changed from 0.1 to 0.8. Experimental results showed that SMD is obtained under 40μm in the most of experimental conditions, regardless of working fluids type. Also, we could observe that SMD is increased but droplet is more uniform when we perform injection especially using vegetable oil as working fluid rather than kerosene.