Effect of Blade Angle and Number on the Performance of Bánki Hydro-Turbines: Assessment using CFD and FDA Approaches

Abstract

The Bánki turbine is a cross-flow turbine with a simple structure that is easy to modify. Changing the turbine's runner geometry is one of the modifications that have an effect on its performance. The goal of this study is to quantify the effect of increasing number of blades and the angle of the blades on the performance of the Bánki turbine. This study was carried out using threedimensional modeling with the ANSYS CFX device and the computational fluid dynamics (CFD) method. The five angles of the blade, namely 10˚, 15˚, 20˚, 25˚, and 30˚, are used to create variations. In addition to the angle factor of the blade, research has been conducted on the number of blades, which are 12 blades, 16 blades, 20 blades, 24 blades, 32 blades, 36 blades, 40 blades, 48 blades, and 52 blades. In a steady-state modeling condition, the applied boundary condition is a water flow velocity of 3 m/s. The results of the CFD modeling are analyzed using a factorial design analysis (FDA). The results indicate that runners with a 15˚ Blade's angle and 40-blade perform best. Results of the factorial design analysis show that the blade angle factor and the number of blades interact.

Experimental Study on the Effect of Pitching Angle on Tandem NACA 0030 and NACA 4412 Airfoils

“…Renewable energy is the government's main focus for alternative energy sources that are environmentally friendly and sustainable 14) . Technology development from renewable energy sources has begun, for example, by utilizing solar [15][16][17][18] , water current 19,20) , wave 21,22) , tidal 23,24) , wind [25][26][27][28] , biomass [29][30][31][32] , geothermal 33,34) , or a combination of the above 35,36) .…”