Fluid dynamics in Savonius turbines

Abstract

The Savonius turbines are vertical axis turbines, there are different from the horizontal axis turbines, which the principle of operation is drag. The Savonius turbines convert wind or water energy into electricity and other energy. Savonius turbines include the Savonius wind turbine and the Savonius water turbine. By studying the background and design of Savonius turbines, the advantages and disadvantages of Savonius turbine can be obtained. The main objectives of this thesis is to study the fluid dynamics behaviour of Savonius turbines and the flow field during operation. Computational fluid dynamics and simulation methods are used to study the flow field of Savonius turbine during operation. Under the condition of specific blade tip speed ratio, the pressure distribution diagram and velocity distribution diagram of Savonius wind turbines and Savonius water turbines can be obtained. These pressure distribution diagrams and velocity distribution diagrams can reflect the performance of the Savonius turbines during operation and intuitively understand the working principle of the Savonius turbines. This thesis can use to improve the Savonius turbines and study the fluid dynamics of Savonius turbines.