Optimal design and sensitivity analysis of airfoil-shaped rotor blade for Savonius wind turbine by using response surface methodology

Abstract

The Savonius wind turbine is cost-effective, simple in structure, and potentially usable in urban areas but suffers from poor efficiency. Further, vortices emerges downward results in a higher rate of exergy loss and lower wind energy to power conversion rate. Thus, the objective of the present study is to enhance the performance of the Savonius wind turbine and reduction of generated friction entropy considering the novel design of airfoil-shaped blade. For this purpose, nine important design parameters of airfoil-shaped blade were chosen and dozen design points were designed based on the Plackett-burman method. After carrying out the screening analysis, the response surface methodology has been used to conduct sensitivity analysis and investigate the higher-order correlations to discover the optimal design of studied airfoil-shaped blade. The obtained results indicate that the optimal design could augment the power coefficient up to 12.89% at TSR = 0.8, compared to conventional semicircular rotor blade.

Experimental investigation and multi-objective optimization of savonius wind turbine based on modified non-dominated sorting genetic algorithm-II

“…As shown in Figure 4(a), as the load increases, the power coefficient reaches its maximum value of 0.16 at a tip speed ratio of 0.74, exhibiting a linear behavior up to the tip speed ratio of 0.47. The power coefficient significantly decreases when the turbine is excessively loaded and when friction is excessive in the transmission system as suggested in earlier studies (Hassanshahi and Kharati-Koopaee, 2023;Hosseini Imeni et al, 2022). Numerical results are in very good agreement with experimental data, which demonstrates the accuracy of the numerical method and assumptions used.…”

Research on the Application of Structural Topology Optimisation in the High-Precision Design of a Press Machine Frame

“…Therefore, The topology optimisation method follows a performance-driven design scheme and can generate a structure with a reasonable material distribution, excellent performance conditions, and light-weight requirements. Ahmadi et al [14] proposed a hierarchical construction method for optimising press performance. The method incorporates overhang constraints and support structure requirements into topology optimisation, making it suitable for high-resolution topology optimisation.…”