Open AccessCalculating the aerodynamics of vertical axis wind turbines
Author(s) -
Hoang Thi Bich Ngoc
Publication year - 2012
Publication title -
vietnam journal of mechanics/mechanics
Language(s) - English
Resource type - Journals
eISSN - 2815-5882
pISSN - 0866-7136
DOI - 10.15625/0866-7136/34/3/2358
Subject(s) - aerodynamics , wind power , rotor (electric) , turbine , azimuth , wind speed , horizontal axis , vertical axis , vertical axis wind turbine , torque , rotational speed , marine engineering , engineering , aerospace engineering , mechanics , control theory (sociology) , structural engineering , meteorology , physics , mechanical engineering , computer science , geometry , mathematics , electrical engineering , control (management) , engineering drawing , artificial intelligence , thermodynamics
Vertical axis wind turbine technology has been applied last years, very long after horizontal axis wind turbine technology. Aerodynamic problems of vertical axis wind machines are discussible. An important problem is the determination of the incidence law in the interaction between wind and rotor blades. The focus of the work is to establish equations of the incidence depending on the blade azimuth, and to solve them. From these results, aerodynamic torques and power can be calculated. The incidence angle is a parameter of velocity triangle, and both the factors depend not only on the blade azimuth but also on the ratio of rotational speed and horizontal speed. The built computational program allows theoretically selecting the relationship of geometric parameters of wind turbine in accordance with requirements on power, wind speed and installation conditions.