Abstract:

Wind turbine blade will be developed to be bigger,less weight and higher performance.High per- formance blade is needed for the high efficient wind turbine.Aeroelastic tailoring is an effective method to design high performance blades,bend-twist coupling is one of the way to realize aeroelastic tailoring.This paper builds up the theoretic equation of bend-twist coupling through study on the control parameters.Redesign of 750KW-blade- spar-cap is made using bend-twist coupling method,in which glass fiber is replaced by carbon fiber,results show that the whole blade performance will be improved greatly.

Key words: aeroelastic tailoring, bend-twist coupling, spar cap