Abdurrahman Zaqi Habibie, Retno Wulandari, Redyarsa Dharma Bintara
A water turbine is an energy conversion machine that converts kinetic energy into mechanical energy. The free flow water turbine can be used in low river flow or free water flow. The purpose of this research is to optimize the design of free flow water turbine that can be adapted to local potential. This research is a quasi-experimental study to determine the effect of fluid velocity parameters, water depth and number of fins on turbine power. The turbine was designed using Autodesk Inventor CAD software with variations of fins numbered 14, 15 and 16. The simulation was carried out with Ansys Fluent software in three stages: pre-processing, solving, and post-processing. In the pre-processing stage determine the geometry, boundary conditions, meshing and set up. The set-up process in the control solver was selected using a k-epsilon realizable model using the Navier Stokes equation. The solving stage for the running process select number iterations with convergent conditions. In the final stage, the post-processing show reading the results of tangential velocity and torque. Based on the results of the study, it was found that the most optimal of free flow water turbine construction was the number of blades 6, the number of fins 15, the water depth was 0.3 m, the highest torque was 26.5867 Nm and the highest turbine power was 77.2030 Watt. © 2023 American Institute of Physics Inc.. All rights reserved.
Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Malang, Jl. Semarang No. 5, Malang, 65145, Indonesia