Effect of blade shape on aerodynamic and aeroacoustic characteristics of vertical axis wind turbines using mid-fidelity and high-fidelity methods

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dc.contributor.authorThambidurai Arasi, Tarun Ramprakash
dc.contributor.authorShubham, Shubham
dc.contributor.authorIanakiev, Anton
dc.date.accessioned2024-06-06T09:43:12Z
dc.date.available2024-06-06T09:43:12Z
dc.date.issued2024-01-04
dc.description.abstractThis research paper investigates the effect of different blade shapes on the aerodynamic and aeroacoustic characteristics of Darrieus Vertical Axis Wind Turbines (VAWTs). Three different VAWT blade shapes are investigated: Straight, Troposkein, and Helical, considering a chord-based Reynolds number of 1.73e+5 and at a constant tip speed ratio for all. The mid-fidelity Lifting Line Free Vortex Wake (LLFVW) method and the high-fidelity Lattice Boltzmann/Very Large Eddy Simulation (LB-VLES) method are employed. Power performance analysis reveals that the straight-bladed VAWT generates the highest power output (about 11% higher), followed by the helical and troposkein blade configurations. The helical-bladed rotor exhibits smoother thrust and torque distribution over a wider azimuthal angle range, as predicted by both methods. While both methods capture the same trends in thrust and torque values, the mid-fidelity LLFVW method predicts approximately 22% higher thrust and torque values and lower near-wake streamwise velocities as compared to the high-fidelity LBM. The LLFVW is unable to accurately capture the inherent 3D vortices in the VAWT flow-field and the effect of blade-vortex interaction (BVI) on the VAWT force-field, as compared to LBM. In terms of aeroacoustics, the troposkein VAWT produces the highest noise at lower frequencies (20-30 Hz), followed by the straight and helical VAWTs. However, the troposkein and helical VAWTs emit more noise at higher frequencies (500-2000 Hz) than the straight VAWT due to the higher intensity of BVI observed for the former.en_UK
dc.description.sponsorshipFor the part of high-fidelity simulations, this project has received funding from the European Union’s Horizon 2020 Marie Curie zEPHYR research and innovation programme under grant agreement No EC grant 860101.en_UK
dc.identifier.citationThambidurai Arasi TR, Shubham S, Ianakiev A. (2024) Effect of blade shape on aerodynamic and aeroacoustic characteristics of vertical axis wind turbines using mid-fidelity and high-fidelity methods. In: AIAA SCITECH 2024 Forum, 8-12 January 2024, Orlando, USA, Paper number AIAA 2024-1488en_UK
dc.identifier.isbn978-1-62410-711-5
dc.identifier.urihttps://doi.org/10.2514/6.2024-1488
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/21982
dc.language.isoen_UKen_UK
dc.publisherAIAAen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectHorizontal Axis Wind Turbineen_UK
dc.subjectLattice Boltzmann Methodsen_UK
dc.subjectVortex Structureen_UK
dc.subjectAerodynamic Simulationen_UK
dc.subjectBlade Vortex Interactionen_UK
dc.subjectCourant Friedrichs Lewyen_UK
dc.subjectReynolds Averaged Navier Stokesen_UK
dc.subjectSound Pressure Levelen_UK
dc.subjectAerodynamic Performanceen_UK
dc.subjectBlade Loadingen_UK
dc.titleEffect of blade shape on aerodynamic and aeroacoustic characteristics of vertical axis wind turbines using mid-fidelity and high-fidelity methodsen_UK
dc.typeConference paperen_UK

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