ME
SCHOOL OF MECHANICAL ENGINEERING

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hoyoung kim
Name
Hoyoung Kim | Professor
Tel
+82-2-3290-3356
Fax
+82-2-929-3082
E-mail
kimhy@korea.ac.kr
address
419, School of Mechanical Engineering, Korea University, Anamdong, 5-Ga, Sungbuk-Gu, Seoul, Korea, 136-713
Education
Feb. 1972 B.S of Mechanical Engineering, Korea University, Seoul, Korea
Feb. 1974 M.S of Mechanical Engineering, Korea University, Seoul, Korea
Jan. 1980 M.S of Energy Engineering, University of Illinois, Chicago, USA
Aug. 1982 Ph.D of Mechanical Engineering, University of Illinois, Chicago, USA
Lab.
Combustion & Thermal Lab.
1. Combustion analysis of gasoline engine of hybrid car
Mixture quality in a CAI engine is one of the key parameters that affect the increases of auto-ignition reliability and thermal efficiency. The direct fuel injection into the cylinder can be used as one of the most effective means of controlling the combustion phasing through various mixture formations. Computational results showed that the intake valve lift of 6 mm with the other intake valve being closed yielded the largest swirling and tumbling, which in turn rendered the optimal fuel-gas mixing. We also found that the fuel distribution affected the auto-ignition sites.
2. Experiment and numerical study on the DME(Dimethyl ether)-LPG mixed fuel
As the concentration of DME increases, position of the flame moves oxidizer side and bowl shaped flame structure distorted and flatten. As the concentration of Propane or that of DME increases the value of NOx was gradually decreased. Characteristics of the mixture fuel were more affected by the DME concentration than the LPG composition. Thus the flame structure and profiles of primary final products and middle species show small variation.
3. Transient group combustion of the interacting liquid droplets and coal particles
The two-dimensional combustion characteristics of liquid fuel droplets and coal particles at various oxygen concentration levels of a surrounding gas have been numerically investigated. The numerical simulations, which use the two-step global reaction model to account for the surrounding gas effect, show the detailed interaction among the inter-spaced particles. The results show that the combustion rate is controlled by the level of oxygen concentration and gas composition near droplets or particles during combustion. The combustion rate is highly dependent on the particle spacing at all oxygen levels.
4. Numerical analysis of primary BOPs of 100kW SOFC power system
Numerical studies on the primary BOPs of 100kW SOFC power system were conducted. Without the perforate plate, in the catalytic combustor which is the one of the primary BOPs of SOFC system, the flow was very irregular. Studies on the surface reaction and porous media were also conducted for analysis of catalytic combustor. Surface reaction was showed on the walls not same as the common gas reaction. In the porous media, distributions of velocity and temperature were very regular.