The aim of IEA Task 47 is to cooperate on the field of detailed aerodynamic measurements on MW scale wind turbines. Such measurements are extremely difficult to do and the only public example until now is the Danish DanAero experiment which was used in IEA Task 29. Recently several other countries initiated new experiments for turbines up to a scale of 8MW and they now all have to go through a similar learning process on these new measurement techniques. Sharing experiences is then a very fruitful way to steepen the learning curves.

The Task also includes analysis of aerodynamic measurements where moreover simulations are carried out on the 15 MW Reference Wind Turbine from IEA Task 37. These simulations give insight into the relevant aerodynamic problems for large scale wind turbines which is important information for the definition of the experimental programs.