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고용서 수원대학교 산업기술연구소 2004 산업기술연구소논문집 Vol.19 No.-
The analytical method is developed for heat loss from the combustor gas to the wall in the coal gasifier. Energy balance through conduction and thin gas radiation on the wall are solved to get the heat transfer coefficient, wall surface temperature, and heat loss to the wall. The analysis includes the parameters such as the equivalent thermal conductivity of the wall, the wall surface radiative property, the wall thickness, etc. The analysis shows that the combustor gas temperature, wall surface temperature and gas radiation affect the temperature gradient and the resulting heat loss to the wall.
고용서 수원대학교 산업기술연구소 2003 산업기술연구소논문집 Vol.18 No.-
The vacuum pyrolysis of a single used scrap tire particle is modelled using the conduction and convection inside the particle, the exothermicity and endothermicity caused by tire decomposition and evaporation, and the variation of the composition and the thermal properties of the tire particle. The complex pyrolysis is simplified as the liquefaction and the subsequent vaporization of a solid tire particle. The model shows the global characteristics of a vacuum pyrolysis of a large tire particle.
고용서 수원대학교 산업기술연구소 2000 산업기술연구소논문집 Vol.15 No.-
The developing spark kernel from an inductive ignition source in a lean propane-air mixture is photographed with a high-speed laser schlieren system. The effect of the critical radius on kernel growth is determined under various conditions for the inductive type ignition source. The intuitive dimensional arguments of the flame kernel growth immediately following a finite-duration spark discharge shows that the temporal growth of the flame kernel radius scales with t1/5 for non-ignition. This 1/5 scaling law is confirmed by comparing with measurements in a quiescent combustion bomb. However, the growth of a blast wave by a instant energy deposit or release scales with t2/5. The measurements of the flame kernel growth immediately following a finite-duration spark discharge also shows that the temporal growth of the flame kernel radius scales with t1/4 for ignition. The increase of the power index in the scaling law for this ignition case confirms the effect of the diffusion on the flame kernel growth.