http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
타워강성 효과를 고려한 소형 수직축 풍력발전기 운전 진동실험 및 해석
추헌호(Heon Ho Choo),심재박(Jae Park Sim),류경중(Gyeong Joong Ryu),김동현(Dong Hyun Kim),김봉영(Bong-Yung Kim) 한국소음진동공학회 2011 한국소음진동공학회 학술대회논문집 Vol.2011 No.10
In this study, operational vibration experiment and analysis have been conducted for the 4-blade small vertical-axis wind turbine (VAWT) including the effect of tower elastic behavior. Computational structural dynamics analysis method is applied to obtain Campbell diagram for the VAWT with elastic tower. An open type wind-tunnel is used to change and keep the wind velocity during the ground test. Equivalent reduced elastic tower is supported to the VAWT so that the elastic stiffness effect of the tower can be reflected to the present vibration experiment. Various excitation sources with aerodynamic forces are considered and the dominant operating vibration phenomena are physically investigated in detail.
추헌호(Heon-Ho Choo),오민우(Min-Woo Oh),김동현(Dong-Hyun Kim) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.5
In this study, construction and experiment have been conducted for the scaled model of a 5MW-class offshore wind-turbine, and comparison results were presented. Aerodynamic analyses using blade element momentum theory (BEMT) computational fluid dynamics (CFD) and experimental wind-tunnel tests are performed considering the variation of blade pitching angles. Scaled blades have been designed to take advantage of the specification of the NREL 5MW offshore wind-turbine model and are accurately constructed using a rapid prototyping machine and composite materials. The present CFD analyses are conducted considering shear-stress transport (SST) k-?turbulence model and the experimental methods are conducted using vehicle mounted testing system(VMTS). In order to verify the scaled model for resonant RPM, the modal analysis of scaled model has been conducted using finite element method (FEM). Real-time measurement equipment is used to monitor the data. Comparison results between aerodynamic analysis and its experimental data are presented for different blade pitching angles in datail.