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RISS 인기검색어
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- 저자 : 이동우(D. W. Lee) (검색결과 96 건)
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의료용 고속 에어터빈 핸드피스의 내부 유동특성에 대한 수치해석
류경진(K.J. Ryu),윤동협(D.H Youn),백준호(J.H. Baek),이동우(D.W. Lee),김동영(D.Y. Kim),장상우,송동주(D.J. Song) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.5
To utilizing CFX V12.0.1, internal flow characteristics of denture high-speed air turbine hand-piece unit was identified, in order to analyze the performance of the torque values were compared. In order to find out the difference of torque by mash values, under steady condition, performed grid convergence test. It compared theoretical torque with torque through flow analysis. To describe the motion of turbine blade was used to immerged solid method. Depending on the location of the turbine blade were calculated from five case. Maximum and minimum values of turbine blades was analyzed. To analyze the performance of the torque values were compared with speed of turbine blade.
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김종봉(J.B.KIM),이동우(J.W.YOON),윤정환(D.W.LEE),양동열(D.Y.YANG) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
2D finite element analysis for the drawbead forming and drawing was carried out. The present study is concerned with the element behavior in bending dominant deformation. In order to investigate the behavior of a 4-node bilinear element and a 9-node quadrilateral element in the tensile mode and in the bending mode, the simple tensile deformation and the transverse shear deformation were analysed. Also, the drawbead forming and drawing was analysed using the two types of elements. The comparison of the computations with the experiments sbows that the 9-node element is more effective than the 4-node element in bending dominant processes.<br/>
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이동우(D. W. Lee),LI HUA,정석권(S. K. Jeong) 한국동력기계공학회 2005 한국동력기계공학회 학술대회 논문집 Vol.- No.-
In this paper, we give an experimental model for optimum control of superheat and capacity control in refrigeration system. First, to obtain dynamics expressions according to change of inverter speed in compressor and opening angle in electronic expansion valve, some experiments were performed. Next, we investigated some data from experiments and analyzed the dynamics responses of superheat. Finally, we presented some dynamics expressions to indicate time constant according to change of operation condition in frequency and opening angle. We expect these expressions and data will be used helpfully to design of refrigeration system with optimum.
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