The Open Mechanical Engineering Journal

2015, 9 : 320-323
Published online 2015 May 29. DOI: 10.2174/1874155X01509010320
Publisher ID: TOMEJ-9-320

Determination Method of Critical Best Tip Speed Ratio for the Vertical Axis Wind Turbine

Zhang Lijun , Liu Hua , Zhang Mingming and Hu Yi’e
College of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao, Shandong, 266580, P.R. China.

ABSTRACT

Tip speed ratio is an important parameter of describing wind turbine performance. Based on vane airfoil profile, the relationship between vane lift coefficient, drag coefficient and angle of attack is calculated by means of Profili software. The corresponding stall angle is also obtained. The relationship between the position angle of vane and angle of attack at different tip speed ratios is drawn by Matlab software and the corresponding best tip speed ratio is determined rapidly. Based on it, the airfoil tangential force is also analyzed for different vane airfoil profiles in the condition of same Reynolds number.

Keywords:

Vertical axis wind turbine (VAWT), Tip speed ratio, Airfoil profile, Profili, Stall angle.