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Computational modeling of the sintering process of ceramic particles in a fluidized bed furnace
안창일,유진복,김유택,이성철 한양대학교 세라믹연구소 2008 Journal of Ceramic Processing Research Vol.9 No.6
The sintering process of ceramic particles is a gas-solid two-phase flow, which is frequently encountered in many industrial fluid flow processes. This paper presents a computational modeling study of gas-solid flow in a fluidized bed furnace by means of threedimensional computational fluid dynamics (CFD) and a discrete phase model (DPM) using a commercial computational fluid dynamics code, FLUENT® 6.3.26. The motion of ceramic particles is calculated by DPM. In DPM, the flow of hot air is described by a momentum conservation equation. A simulation is performed in the furnace by varying the additional inlet mass flow rates and the distributor’s hole diameter across the values 2.2 mm, 1.8 mm, 1.4 mm and 1.0 mm. Through this simulation, it is possible to visually observe the temperature and velocity distribution inside the furnace, and we can optimize the process parameters such as hole diameter of the distributor and mass flow rates of an additional inlet for the sintering of the ceramic particles. Numerical results of a three-dimensional fluidized bed are compared to experimental results in order to validate this model.
김외철(Oe-Cheul Kim),유진복(Jin-Bok Ryu) 대한전자공학회 2006 대한전자공학회 학술대회 Vol.2006 No.11
The Korean Helicopter Program (KHP) is a research and development program, which performs timely successful acquisition of the helicopter required by the Republic of Korea Government(ROKG) under the joint responsibility of the Aircraft Manufacturers who has experience of the helicopter development, Korean Participating Industries(KPI) and research institutes in accordance with work-share. This paper shows the application scheme of Integrated Avionics System and HUMS System for KHP.
신훈범(H.B. Shin),유진복(J.B. Ryu) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.5
The hot gas reingestion phenomenon of helicopter brings about the reduction of engine power available around in-ground. The phenomenon will vary for the conditions of ambient conditions and engine exhaust gas, the flow field associated with the downwash effect of main rotor. To verify the amount of hot gas reingestion to intake, Tests(Wind tunnel test, Flight test) or CFD could be available. At this study, the reingestion around in-ground would be predicted by numerical anaslysis(CFD).
신훈범(H.B. Shin),유진복(J.B. Ryu) 한국전산유체공학회 2012 한국전산유체공학회 학술대회논문집 Vol.2012 No.5
This study presents the process of icing analysis to predict the icing shapes and performance of anti/de-icing systems. To predict the particle trajectory and collection efficiency on the 2D airfoil, The trajectory code is developed using the UDS(User Defined Scalar Transport Framework) of FLUENT. Energy balances are performed to predict the surface temperature distribution on the 2D airfoil. A various tests results which contain the ice shapes and temperature distribution are considered to validate the numerical method and results.
항공기 엔진베어 내 소화장치 성능예측을 위한 전산해석방법 연구
신훈범(H.B. Shin),서석주(S.S. Joo),정주현,유진복 한국전산유체공학회 2010 한국전산유체공학회 학술대회논문집 Vol.2010 No.5
There is fire dangers inside engine bay where fuel of oil leakge can be ignited by hot engine surfaces. So, Fire suppressor is needed to extinguish the flames. The current FAA requirement is that the concentration level should be greater than 6% by volume throughtout the protected zone for longer than a half second simultaneously. To Satisfy the FAA requirement, The Fire extinguish system should quickly delivery the fire extinguish agents and Fire extinguish system should be designed effectively. This study is to develop and simulate the injection of fire extinguish agents into the engine-bay. Transient simulations were performed and predicted the concentration of fire extinguish agents at the certain locatioin in the engine-bay.