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하윤진(Yoon-Jin Ha),이영길(Young-Gill Lee),정광열(Kwang-Leol Jeong),조민태(Min-Tae Cho),강대선(Dae-Sun Kang) 한국해양환경·에너지학회 2012 한국해양환경공학회 학술대회논문집 Vol.2012 No.5
In this study, the flow characteristics around a vertical-axis wind turbine(VAWT) are investigated by numerical simulations. A vertical-axis wind turbine among existing articles is used as the objective model in the present research. The results of the numerical simulations are compared with the results of the model tests from published articles. Also, a plate is installed on the bottom of the vertical-axis wind turbine and found out about the influences of ike bottom plate. By the bottom plate, the tip vortices are reduced and the fiow characteristics are changed. The power coefficient of the wind turbine with bottom plate is increased by a maximum of 50%. Sizes of the wind turbine are deterntined for 1 kW power generation, and the sizes of them are compared with the other sizes of existing 1 AW class vertical-axis mind turbines. The projected area of the 1 kW wind turbine with bottom plate is reduced by a maximum of 30%. On the other hand, modd analyses are performed to find out the natural frequencies of the 1 kW wind turbine, and the resonance safety of the 1 kW wind turbine is estimated by the results of the modal analyses. The results of the present research could be used as one of the fundamental data to design a 1 kW class vertical-axis wind turbine.
하윤진(Yoon-Jin Ha),이영길(Young-Gill Lee),정광열(Kwang-Leol Jeong),조민태(Min-Tae Cho),강대선(Dae-Sun Kang) 대한조선학회 2012 대한조선학회 학술대회자료집 Vol.2012 No.5
In this study, the flow characteristics around a vertical-axis wind turbine(VAWT) are investigated by numerical simulations. A vertical-axis wind turbine among existing articles is used as the objective model in the present research. The results of the numerical simulations are compared with the results of the model tests from published articles. Also, a plate is installed on the bottom of the vertical-axis wind turbine and found out about the influences of the bottom plate. By the bottom plate, the tip vortices are reduced and the flow characteristics are changed. The power coefficient of the wind turbine with bottom plate is increased by a maximum of 50%. Sizes of the wind turbine are determined for 1 kW power generation, and the sizes of them are compared with the other sizes of existing 1 kW class vertical-axis wind turbines. The projected area of the 1 kW wind turbine with bottom plate is reduced by a maximum of 30%. On the other hand, modal analyses are performed to find out the natural frequencies of he 1 kW wind turbine, and the resonance safety of the 1 kW wind turbine is estimated by the results of the modal analyses. The results of the present research could be used as one of the fundamental data to design a 1 kW class vertical-axis wind turbine.