Abstract
Wave energy extracting devices such as an oscillating water column (OWC) in general have lower efficiency compared to other energy extracting techniques due to non-optimal design of various components. OWC is an empty vertical column housing an Wells or an impulse turbine. This chapter presents a detailed methodology in optimizing few design variables such as the number of guide vanes, number of rotor blades, guide vane angle with an objective to maximize efficiency. This is achieved by using a combination of low fidelity method (surrogate modelling) and high fidelity method (CFD simulation) which utilizes computational resources effectively. The relative overall mean efficiency increment taken over a wider flow coefficient range was approximately \(24\%\) while for the peak to peak comparison, the relative enhancement was \(28\%\). Flow dynamics have also been studied to understand the reason for enhancement in efficiency with the optimal design.
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Badhurshah, R., Samad, A. (2022). Optimization of an Impulse Turbine for Efficient Wave Energy Extraction. In: Samad, A., Sannasiraj, S., Sundar, V., Halder, P. (eds) Ocean Wave Energy Systems. Ocean Engineering & Oceanography, vol 14. Springer, Cham. https://doi.org/10.1007/978-3-030-78716-5_15
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DOI: https://doi.org/10.1007/978-3-030-78716-5_15
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