Multi-objective Optimization of Savonius Wind Turbine

TL;DR

This paper develops a numerical dataset and uses multi-objective optimization to enhance Savonius wind turbine designs, significantly improving torque, speed, and power coefficients through data-driven models and evolutionary algorithms.

Contribution

It introduces a novel multi-objective optimization framework for Savonius turbines using GMDH models and Pareto-based methods, optimizing key design parameters.

Findings

Torque coefficient increased by 13.74%

Rotational speed improved by 0.071%

Power coefficient enhanced by 5.32%

Abstract

A numerical data set will be developed to assist in the design of Savonius wind turbines. The main objective of study is to improve Savonius turbine blade designs to increase torque coefficients, rotational speeds, and pressure coefficients. Simulating 3D models and validating them with wind tunnel data were part of the experimental design methodology. Multi-objective optimization is used to optimize turbine performance. Twist angle, aspect ratio, and overlap ratio are all important factors in determining the optimal torque and power coefficients. Data-driven objective functions were modeled using the group method of data handling (GMDH). Using an evolutionary Pareto-based optimization approach, polynomial models were used to plot Pareto fronts and TOPSIS to calculate optimal commercial points. The torque coefficient, rotational speed, and power coefficient are all improved by 13.74%, 0.071%, and 5.32%, respectively. As a result of the multi-objective optimization of the turbine, some significant characteristics of objective functions were discovered.