http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
초음속 흡입구의 통로길이와 받음각에 따른 유동장 변화 연구
류경진(K.J. Ryu),임설(S. Lim),김상덕(S.D. Kim),송동주(D.J. Song) 한국전산유체공학회 2010 한국전산유체공학회 학술대회논문집 Vol.2010 No.5
The flow characteristics on a supersonic inlet with bleeding system by changing angles of attack and channel length conditions are studied by computational 3D turbulent flow analysis. A compressible upwind flux difference splitting Navier-Stokes method with k-ω turbulence model is used to analysis the inlet flowfield. More non-uniform flowfields are shown at the AIP when angle of attack becomes bigger and bigger. These non-uniform flowfield works the performance aggravating factors of the supersonic engine. Non-uniform flowfield by changing channel length at the various angle of attack are investigated.
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.
공기 질 개선을 위한 모형 터널 내 열차 풍 수치 해석적 연구
류경진(K.J. Ryu),막슈다 주래바(M. Juraeva),송동주(D.J. Song) 한국전산유체공학회 2012 한국전산유체공학회 학술대회논문집 Vol.2012 No.5
Subway environment requires efficient ventilation systems. In the major cities, subway is widely used, public transportation. The Platform Screen Doors installation improves the air quality in the station but degrades the air quality in the subway tunnel. Proper ventilation system is needed to maintain Indoor Air Quality in the subway tunnel. The model subway tunnel is made to investigate the ventilation systems in the tunnel. The model subway tunnel airflow is simulated and analyzed by using ANSYS CFX software. The numerical analyses are compared with experimental results. The flow characteristics with guide vane and air-curtain installations in the tunnel are discussed in the paper. The velocity and mass flow rates in the tunnel are also investigated.
Air texturing 노즐 형상 설계를 위한 수치적 연구
류경진(K.J. Ryu),막슈다 주래바(M. Juraeva),송동주(D.J. Song) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.11
Production of synthetic yarns has air-texturing, air-covering and air-interlacing processes in textile manufacturing. The processes are widely used in the fiber industry. The important component in the air-texturing process is the air-texturing nozzle. The manufacturing specification requires better air-texturing qualities, higher process speeds and reduced air consumption. This research investigates the airflow inside of air-texturing nozzle to find the design variables of the nozzle which increases production speeds, reduces air-consumption and improves yarn quality. The ANSYS CFX is used to perform steady simulations of impinging airflow inside of the nozzle. The vortical structure and the airflow pattern such as pressure, vorticity and velocity are discussed in this paper.
환기 시스템을 이용한 자동차 부품공장 내부의 열 유동 응력 해소를 위한 수치해석적 연구
류경진(K.J. Ryu),이동욱(D.U. Lee),송동주(D.J. Song) 한국전산유체공학회 2012 한국전산유체공학회 학술대회논문집 Vol.2012 No.5
Working environment of plant workers needs to be improved due to increasing demand on the comfortable working condition. The thermal flow of an automotive plant in terms of comfort index was analyzed by using ANSYS-CFX software. The working environment was investigated with/without ventilation systems. Numerical analysis was accomplished to improve thermal flow stress by installing ventilation fans near the thermal stress concentrated field. Additional ventilating fans system and existing conditions were compared by numerical analysis.
무빙메시를 이용한 치과 치료기기용 에어모터 핸드피스의 성능에 관한 수치해석적 연구
성용준(Y.J. Sung),류경진(K.J. Ryu),송동주(D.J. Song) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.5
The vane type air-motor hand-piece is used widely in the dental services. There are a lot of experimental studies Ghoul air-motor but eccentrically off not many numerical studies by using Computational Fluid Dynamics. An air-motor has rotor which rotates at the center of inner housing. The retractable vanes are installed on the rotor. As the rotor of the air-motor rotates, vanes move up and down straightly in the radial direction along the guide. Therefore we have to analyze the unsteady flow field by accurate time dependent marching technique. ANSYS 12.0 CFX is used to analyze unsteady vane-motor flow field. Analysis of the changing control volume inside air-motor is implemented by user-defined functions and moving mesh options. Rotational speed of the rotor is approximately 23,000rpm.
의료용 고속 에어터빈 핸드피스의 내부 유동특성에 대한 최적화 설계
윤동협(D.H. Youn),류경진(K.J. Ryu),송동주(D.J. Song) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.11
The dental high-speed air turbine handpiece is the most popular device in clinical dentistry as a denture cutting tool. Developing the air turbine handpiece is important and it is studied by using computational fluid dynamics. The effects of the air turbine blade shape are investigated for optimum design. The moving mesh method is applied to find the torque through mesh convergence study. The pressure and torque values are obtained in the each blade shape considered. The blade shape is optimized by comparing the torque value of each blade shape.
가이드 베인이 설치된 지하철 터널 내부 공기 유동의 수치해석 연구
이동욱(D.U. Lee),류경진(K.J. Ryu),막슈다쥬레바(M. Juraeva),정상현(S.H. Jeong),송동주(D.J. Song) 한국전산유체공학회 2013 한국전산유체공학회 학술대회논문집 Vol.2013 No.5
A computational model of mechanical shaft of existing Seoul subway tunnel was analyzed in this research. The airflow in the sharft and the tunnel was investigated to find installing location of a guide vane. The numerical analysis characterized the aerodynamic behavior and performance of the airflow by solving three-dimensional turbulent Reynolds-averaged Navier-Stokes equations. ANSYS CFX software was used for the computations. The airflow in the ventilation shaft of the tunnel was investigated by analyzing the mass flow rate. The computational results showed the number and proper installing location of the guide vanes in the mechanical shaft to install the guide vane.