Usteady Flow Simulation of Startup Process of Thevertical Axis Wind Turbine

• Main Authors: Wen Jhing Chang, 張文璟
• Other Authors: Chao Chang
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/94682634673706764854

碩士 === 中華科技大學 === 機電光工程研究所碩士班 === 99 === The vertical axis wind turbine(VAWT) compared with other wind turbine has a lower coefficient but still has some superiority. The VAWT structure is simple and, can start turning without facing in the wind direction. Although it is well suited to be integrated in urban environment as a mini or micro wind turbine it is not suitable when high power is needed. For this reason several studies have been carried-out in recent years in order to improve its aerodynamic performance. In this paper a computational fluid dynamics (CFD) for unsteady state startup processes of the VAWT is studied, combing the fluid-structure interaction between fluid and blade; and simulates several wind velocity conditions. With a grid sliding system during the startup procedure, the numerical simulation makes a complete analysis to obtain rotating and flowing results around VAWT showing the corresponding interactions between blades and flow in details and helpful to deep understand the VAWT flow phenomena.