http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
[연료 및 윤활유부문] 3차원 유동해석을 통한 차량 소음기의 소음예측
진봉용(Bong-Yong Jin),이상호(Sang-Ho Lee),이병직(Byung-Jik Lee),조남효(Nam-Hyo Cho) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Numerical analysis with Computational Fluid Dynamics (CFD) was carried out to investigate exhaust gas flow and acoustic characteristics in the exhaust system of a passenger car. Transient 3-dimensional flow field in the front and rear mufflers was simulated by CFD and far-field sound pressure was modeled by a simple monopole source method. Engine performance simulation was also performed to obtain the boundary condition of instantaneous pressure variation at the system inlet. Detailed exhaust gas flow characteristics such as velocity and pressure distribution inside the mufflers were presented. Especially pulsating pressure amplitude was compared at several locations in the front and rear mufflers to deduce sound pressure level. The present method of acoustic analysis coupled with CFD modeling would be very effective for the prediction of sound noise in the exhaust system
[가솔린엔진부문] 촉매변환기내 유동분포 개선을 위한 형상 최적화
진봉용(Bong-Yong Jin),백경욱(Kyung-Wook Baek),조남효(Nam-Hyo Cho) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_1
Performance improvement and longer service life of automotive catalytic convener can be achieved by improving the flow distribution of exhaust gas through a catalytic convener. Several design parameters which include the geometry of diffuser inlet and inlet diffuser, relative position of inlet pipe and monolith centers were investigated against their effects on flow uniformity in the convener. The flow distribution was improved by the geometry optimization of exhaust system under limited conditions.
이상혁(Sang Hyuk Lee),허남건(Nahmkeon Hur),진봉용(Bong Yong Jin) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
In this study, the characteristic of a vane pump of automative power steering system is numerically analyzed. The vane pump changes the energy level of operation fluid by converting mechanical input power to hydraulic output. To simulate this mechanism, moving mesh technique is adopted. As a result, the flow rate and pressure are obtained by numerical analysis. The flow rate agrees well with the experimental data. Moreover, the variation and oscillation of the pressure around the rotating vane are confirmed. The difference of pressure appears in the vane tip as a result of the flow characteristics. Furthermore, the back flow into the rotor was observed. As the rotation velocity increases, the flow rate at the outlet and the pressure in the vane tip rises with higher amplitude of oscillation. The design of a device reducing the oscillation is required.
이상석(Sang-seok Lee),이명용(Myeong-yong Lee),이지홍(Ji-hong Lee),이진석(Jin-seok Lee),이도형(Do-hyung Lee),진봉용(Bong-yong Jin) 대한설비공학회 2008 대한설비공학회 학술발표대회논문집 Vol.2008 No.2
Recently a certain level is required in natural ventilation for improving on the 'quality' aspect in housing. It is simulated the external flow around building which affact natural ventilation using CFD. Natural ventilation is estimated on the specific household which considered topography and not considered.
이동 격자를 이용한 Power Steering용 Vane Pump 유동 해석
이상혁(Sang Hyuk Lee),허남건(Nahmkeon Hur),진봉용(Bong Yong Jin) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
In this study, the characteristic of a vane pump of an automative power steering system is numerically analyzed. The vane pump changes the energy level of operation fluid by converting mechanical input power to hydraulic output. To simulate this mechanism, moving mesh technique is adopted. As a result, the flow rate and pressure are obtained by numerical analysis. The flow rate agrees well with the experimental data. Moreover, the variation and oscillation of the pressure around the rotating vane are confirmed. The difference of pressure appears in the vane tip as a result of the flow characteristics. Furthermore, the back flow into the rotor was observed.