抄録
A wind field experienced by a Horizontal Wind Axis Wind Turbine (HAWT) is non-uniform in space and unsteady in time, namely turbulent. Turbulence characteristics of the wind incoming to a rotor bring about complicated aerodynamic loads on the wind turbine, which must be taken into account in the structual design process of the rotor blades. Our study is aimed at developing the method to simulate the turbulent wind field numerically and to calculate its influence on the fatigue loads experienced by the rotor blades. This paper presents the results of numerical analysis of the aerodynamic loads on HAWT rotor under two kind of uniform and unsteady wind conditions, the one is a stepwise change in wind velocity and the other is sinusoidal.
