http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
LIF 공초점 현미경을 이용한 장애물이 있는 Y-채널 마이크로믹서의 최적설계 평가
현석호(Seok-ho Hyun),이도형(Dohyung Lee),이성수(Seong-soo Lee),전재연(Jea-youn Jeon) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
Owing to the extremely small device and velocity scale, mixing in microchannel proceeds very slowly by way of molecular diffusion transport. Thus mixing enhancement becomes a central issue in microfluidics for biomedical and chemical applications. In this work, we evaluate the simulation result of optimization procedure through experiment and fabrication. In efficient micromixer design, it is essential to evaluate mixing efficiency with good precision. Mixing efficiency for Y-channel micromixer is measured by fluorescence intensity using LIF(Laser Induced Fluorescence) Confocal Microscope. The Y-channel micromixers are fabricated with polydimethylsiloxane(PDMS). Nile Blue A is injected into the micromixer as a fluorescence dye for measuring of fluorescence intensity by He/Ne laser. Throughout the experiments and computer simulation, accurate mixing efficiency evaluation process for a PDMS Y-channel micromixer is established.
수치해석적 기법을 이용한 스탠드 김치냉장고용 냉각 원심팬의 최적 설계
현석호(Seok-Ho Hyun),이창익(Chang-Ik Lee),장부백(Chang boo-Baik),박성관(Sung-Kwan Park) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.11
In this study, the cooling centrifugal fan of vertical type Kimchi refrigerator is developed from using computational fluid dynamics(CFD) and design of experiment(DOE) to overcome performance loss caused by restricted structure. In order to improve fan performance, essential variable of centrifugal fan is optimized using response surface method(RSM). To verify optimized result from response surface method(RSM), we actually make a cooling fan applied optimized and performed flow rate experiment.
LIF Conforcal Microscope을 이용한 Y-channel 마이크로믹서의 최적설계 연구
김상우(Sangwoo Kim),현석호(Seok-ho Hyun),신태석(Taeseok Shin),이도형(Dohyung Lee) 대한기계학회 2009 大韓機械學會論文集B Vol.33 No.5
Due to extremely small device size and velocity scale, mixing in microchannel take place very slowly by way of molecular diffusion transport. Mixing enhancement becomes a central issue in microfluidics for biomedical and chemical applications. In this work, The optimization results and validation through experiment and fabrication. In this efficient micromixer design, it is essential to evaluate mixing efficiency with good precision. Mixing efficiency for Y-channel micromixer is measured by fluorescence intensity using LIF(Laser Induced Fluorescence) Confocal Microscope. The Y-channel micromixers are fabricated with polydimethylsiloxane(PDMS). Nile Blue A is injected into the micromixer as a fluorescence dye for measuring of fluorescence intensity by He/Ne laser. Throughout the experiments and computer simulation, accurate mixing efficiency evaluation process for a PDMS Y-channel micromixer is established.
현동훈(Donghun Hyeon),이태호(Tae Ho Lee),현석호(Seok-ho Hyun),정병훈(Byung Hun Jeong),한정식(Jeong Sik Han),박정배(Jeongbae Park),김성현(Sung Hyun Kim) 한국추진공학회 2016 한국추진공학회 학술대회논문집 Vol.2016 No.5
극초음속 비행체에서는 공기와의 마찰열과 엔진열의 증가로 기체 내부의 열적 부하가 발생한다. 이는 비행체 내부 구조물의 변형을 일으키고 오작동을 발생시킬 수 있다. 흡열연료는 액체 탄화수소 연료로 흡열반응을 통해 열을 흡수할 수 있는 연료이다. 본 연구에서는 exo-tetrahydrodicyclopentadiene을 모델연료로 선정하고 흡열 냉각 시스템에 제올라이트 촉매를 사용하여 흡열반응을 수행하였다. 본 연구의 목적은 흡열량 향상에 미치는 촉매의 특성을 연구하는 것이다. 이 촉매는 exo-THDCP를 흡열연료로 사용하는 시스템에 적용될 수 있을 것이다. In hypersonic aircraft, increase of aerodynamic heat and engine heat leads heat loads in airframe. It could lead structural change of aircraft’s component and malfunctioning. Endothermic fuels are liquid hydrocarbon fuels which are able to absorb the heat load by undergoing endothermic reactions. In this study, exo-tetrahydrodicyclopentadiene was selected as a model endothermic fuel and experiments were investigated in endothermic fuel cooling system with zeolite catalyst. The object of this study is inspect catalyst properties which have effect on heat absorption improvement. This catalyst could be applied to system that use exo-THDCP as endothermic fuel.
김준형(Joon-Hyung Kim),최영석(Young-Seok Choi),윤준용(Joon-Yong Yoon),박성관(Sung-Kwan Park),현석호(Seok-Ho Hyun) 한국유체기계학회 2010 유체기계 연구개발 발표회 논문집 Vol.2010 No.12
The kimchi refrigerator is the electronic home appliance which is used for the maturing and a custody of the kimchi. In this paper, performance improvement of fan and duct system for kimchi refrigerator has been studied by using a commercial CFD code. In order to achieve a improved fan performance, three-dimensional computational fluid dynamics and the Design of Experiments method have been applied. Additionally, to know the optimized duct inlet shape with the optimized fan. the overall performances were calculated with various duct inlet shapes. The final fan and duct system for kimchi refrigerator showed improved performance in efficiency and total head compared with the existing model.