%0 Journal Article %T ANALYSIS OF AERODYNAMIC PARAMETERS AND ENERGY EFFICIENCY OF VERTICAL AXIS WIND TURBINES %A Ilyin, R.. %A Shishkin, N.. %K vertical axis wind turbines, Darrieus rotor, Savonius rotor, combined wind turbines, energy efficiency %J Vestnik of Astrakhan State Technical University %D 2018 %N 2018 %P 8 %I Astrakhan State Technical University