EFFICIENT MODELING OF BLADES VIA BEAM ELEMENT IN THE MULTI-OBJECTIVE OPTIMIZATION OF SMALL WIND TURBINE BLADES

Date

2023-01-01

Author

Kayran, Altan
Çöker, Demirkan
Muyan, Can
Batmaz, Onur Ali
Pourrajabian, Abolfazl
Wood, David

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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A study is conducted to propose an efficient structural analysis method to be included in the multi-objective optimization of small wind turbine (SWT) blades. For this purpose, initially aerodynamic optimization of a SWT blade is performed utilizing a multi-objective function including the power output and the starting time. Structural analyses of the aerodynamically optimized blade are performed utilizing different fidelity finite element models for justifying the use of the reduced-order finite element (FE) model with beam elements. As a reference, higher fidelity three-dimensional (3-D) FE analyses of the blade are performed and alternative 1-D beam-blade models are evaluated utilizing the results of 3- D FE solutions. In this respect, tapered and multi-section non-tapered 1-D beam-blade model alternatives are evaluated as potential lower fidelity reduced-order models to be employed as efficient structural solvers in a future multi-objective optimization of the small wind turbine (SWT) blade. It is shown that multi-section non-tapered beam-blade FE model of the SWT blade is a robust model which handles unsmooth section transitions, which are encountered in meta-heuristic optimization of blades, effectively unlike the tapered beam-blade model and it can be used in a future constrained optimization involving structural metrics as constraints and/or objective functions.

URI

https://hdl.handle.net/11511/111958

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Department of Aerospace Engineering, Conference / Seminar