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미립화 및 분무장치 : 동물성 바이오 디젤의 미립화 특성연구
박현창 ( Hyun Chang Park ),윤석주 ( Suck Ju Yoon ) 한국액체미립화학회 2013 한국액체미립화학회 학술강연회 논문집 Vol.2013 No.-
Rapid depletion of Fossil fuel resources and increased environmental pollution are requiring development of alternative fuels form renewable resources. Bio-diesel(BD) can be alternative for existing fuels and solve environmental problems. BD produced form vegetable oils have been done many studies. But, vegetable oil BD is the expansive production expense because of the rise in crop price. Thus, Researches of cheap BDs are needed expect vegetable oils. Animal fat is one of them. Animal fat BD is similar properties as commercial diesel and lower cost of production than vegetable BD. In this pare, we were performed atomization characteristics of animal fat BD, for Lard and Beef-tallow, according to increasing injection pressure and analyzed by using LDPA. Also, it was compared with Palm oil. The experimental results indicate the mean droplet size of animal fat BDs that is smaller than the mean droplet size of Palm oil BD.
정회중 ( Hoi Joong Jeong ),윤석주 ( Suck Ju Yoon ) 한국액체미립화학회 2018 한국액체미립화학회 학술강연회 논문집 Vol.2018 No.-
This study investigated the characteristics of the horizontal type dust collector swirl generators following the previous studies using CFD. As the shape design factor of the swirl generator, the installation angle and number of vanes were selected. The installation angles of vanes were 30, 35, 40 and 45 degrees, and the number of vanes were 10, 12. Experiments were carried out to measure the resistance to wind and the collection efficiency according to the shape conditions of the swirl generator.
박현창(Hyun-Chang Park),윤석주(Suck-Ju Yoon) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
The bio diesel became one of the environmentally friendly alternative fuel when applied to the combustor. In this paper, we were performed atomization characteristics by bio diesel blended rate for injection pressure varied form 0.8MPa to 1.8MPa. the LDPA(Laser Diffraction Particle size Analyzer) was measured atomization characteristics such as SMD, Dmax and Span-factor. To the experimental result, Particle size showed the tendency to be increase according to the blending rate of the bio diesel, and Variation of particle size was less when compared kerosene within blending rate of 30%.
박현창(Hyun Chang Park),윤석주(Suck Ju Yoon) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
Bio-diesel has similar properties with diesel as the alternative fuel and is more favorable form environmental issues. In this pater, we were performed a study on the atomization characteristics of bio-diesel. we used the beef-tallow and lard of animal fats BD and palm of vegetable BD As experimental fuels and performed different injection pressure varied form 25MPa to 160MPa by experiments conditions. by using high speed digital camera, we were analysed for macroscopic characteristics of spray, such as spray angle , spray penetration and spray velocity, on injection duration at 1.5ms. Also, When using LDPA device, we were known about the microscopic characteristics of spray, such as SMD and Dmax, on injection duration 4ms. As the experimental results, The spray penetration increased with increasing injection pressure. Beef-tallow BD was shown adjacent to diesel. The spray angle showed almost similar distributions regardless of BDs and injection pressure. also, The mean droplet size such as SMD and Dmax of BDs decreased with increasing injection pressure. In the case of injection pressure of 25MPa, Dmax showed that about BDs in the size fo the difference was caused significantly.
고동국 ( Dong Guk Ko ),윤석주 ( Suck Ju Yoon ) 한국분무공학회 2014 한국액체미립화학회지 Vol.19 No.2
The comparison of the flow characteristics between circular and swirl jets which were controlled by the spinner attachment inside the airtube were conducted in this study. Swirl jet means a flow in whirls by mixing the flow of axial and tangential direction. Swirl flow has been used for the improvement of the combustion efficiency in the combustor. This flow is controlled by the spinner which has several vanes inclined by certain angles to the axial direction. In this study, angle of vane 30° and diameter ratio of outlet to inlet of the airtube 0.73 were made. These spec. should find on the general gun type burner built in the domestic small size boiler. As the flow characteristics, axial and tangential velocities were measured by using the 2-D hot-wire velocimeter system and analyzed statistically. And also this research conducted a practical experiment considering to the attached belongings likes as ignitor, nozzle etc. on the airtube of the gun type burner. As a result, swirl occurred at the occasion of beingness and flow region extended considerably toward the radial direction. But effect of swirl did not transmit to the downstream. And the complicated flow was appeared regardless of the existence of spinner because of the effect of belongings.
연소효율 개선을 위한 스월제트의 난류유동 특성에 관한 연구
고동국 ( Dong Guk Ko ),윤석주 ( Suck Ju Yoon ) 한국분무공학회 2014 한국액체미립화학회지 Vol.19 No.2
Swirl flow in the gun type burner has a decisive effect on the stabilization of the flame, improvement of the combustion efficiency, and also a reduction of NOx. This swirl flow is created by the spinner which is inside the airtube that guide the combustion air. Gun type burner has generally the inner devices composed nozzle adapter, spark gap ignitor, and spinner. These inner components change the air flow behavior passing through air tube. Meanwhile, turbulent characteristics of this air flow are important to understand the combustion phenomena in the gun type burner, because the mixture of fuel and air are depended on. However, nearly all of the studies have been analyzed the turbulent flow of simplified combustion formation without the inner devices. So, this study conducted the measurement using by hot-wire anemometer and analyzed turbulent flow characteristics of the swirl flow discharged from the air tube with inner devices. Turbulence characteristics come up in this study were turbulence intensity, kinetic energy and shear stress of the air flow with the change of the distance of axial direction from the exit of the air tube.