Review of Experimental and Computational Analysis of Coaxial H-Savonius Vertical Axis Wind Rotor

In recent times the development and activities of renewable energy are growing exponentially. Amongst the various kind of renewable resources, wind energy is one of the most preferable due to its abundant availability, lesser cost, zero-emission compared to other sources. Among the various kind of vertical axis wind turbines (VAWT), H-Darrieus rotor is more popular in the built environment for their simple constructions and higher power coefficient which also suffers from poor self-starting features. Again, the Savonius rotor is having the good self-starting capability but possess lesser power coefficient. To address all such limitations, investigations of hybrid H-Savonius rotor have been studied here in terms of the design, various parameters and augmentation techniques which are used to improve their self-starting and aerodynamic performances. This paper could work as a benchmark on the progress to improve the design and performance of the hybrid H-Darrieus rotor.