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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.
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.
정회중 ( Hoi Joong Jeong ),윤석주 ( Suck Ju Yoon ) 한국액체미립화학회 2018 한국액체미립화학회 학술강연회 논문집 Vol.2018 No.-
This study investigated the characteristics of particle size in the pressure swirl nozzle. Paricularly, LDPA, instrument for measuring particle size characteristics was studied. In the initial spray, D99 exceeding the measuring range was measured, and the same spray was analyzed with a high-speed camera. Similar results were obtained when analyzing the data measured by LDPA after removing the values out of the measurement range. All of measured data was analyzed using the same editing method.
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%.