TIP AIRFOIL OF WIND POWER GENERATOR FOR STALL CONTROL AND STEADY SPEED OPERATION IN LOW WIND SPEED WITH IMPROVED CONTAMINATION DULLNESS

摘要

A tip airfoil of a blade for a wind power generator to steadily operate at a low speed with improved contamination sensitivity is provided to form at least one transition lamp area on an upper surface to enhance contamination sensitivity. A tip airfoil is provided at a free end of a blade of a wind power generator. The tip airfoil includes a leading edge(9) and a trailing edge(13) spaced apart from the leading edge by a predetermined distance. The tip airfoil includes upper and lower surfaces(7,8) provided between the leading edge and the trailing edge. Operational reynolds numbers are in the range of 1,000,000 to 1,600,000. The sensitivity of surface contamination of the tip air foil corresponds to 95% to 99%. The maximum lift coefficient is in the rage of 1.5 to 1.7. The thickness ratio of the tip airfoil corresponds to 11% to 13%.