Abstract: As fossil energy reserves decrease ceaselessly, many efforts have been made to find new substitutes. Wind energy, a type of clean, non-pollutive and renewable energy, is becoming increasingly important. In this paper, efficiency of the vertical axis turbine is investigated, which is suitable for arbitrary wind directions in collection-shield pattern. Flow field simulation indicates that this new kind of wind turbine can effectively raise the rotor output.

Key words: wind energy, wind turbine, renewable energy