Sukra Helitek is a company that provides engineering consultancy and they specialize in Computational Fluid Dynamics (CFD) applications for wind turbines (and other rotorcraft). They are based out of the United States.
Sukra Helitek develops CFD software that is used for numerical study of wind turbine efficiency and CFD simulations to augment wind tunnel data, among others.
One of their products, Rot3DC can be used for predicting the power output of Horizontal Axis Wind Turbine (HAWT) and this data can be combined/compared with experimental data.
I was informed that a new branch office of Sukra Helitek is coming up shortly in Chennai, India and this will make it easier to support customers in India.
More information/contacts: http://www.sukra-helitek.com/index.html
