Richardson extrapolation method applied to aerodynamic and aeroacoustic characteristics of vertical axis wind turbine using Lattice Boltzmann Method

Richardson extrapolation method applied to aerodynamic and aeroacoustic characteristics of vertical axis wind turbine using Lattice Boltzmann Method | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 28 March 2025 V1 Latest version Share on Richardson extrapolation method applied to aerodynamic and aeroacoustic characteristics of vertical axis wind turbine using Lattice Boltzmann Method Authors : Shubham Shubham [email protected] , Nigel Wright 0000-0002-1289-2830 , and Anton Ianakiev Authors Info & Affiliations https://doi.org/10.22541/au.174315449.90660013/v1 204 views 181 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Aerodynamics and aeroacoustics of a 2-bladed vertical axis wind turbine operating at a chord-based Reynolds number of 1.5 × 10 5 are examined. Four tip speed ratios (TSRs) are considered (0.37, 1.12, 2.23, and 2.97), all at a fixed freestream velocity of 5.07 m/sec. Commercial software 3DS SIMULIA PowerFLOW, employing a Lattice Boltzmann/Very Large Eddy Simulation approach, is used to perform high-fidelity CFD simulation. Far-field noise levels are obtained via the Ffowcs Williams–Hawkings acoustic analogy. Using Richardson extrapolation to compute grid convergence indices (GCI), thrust, lateral force, and overall sound pressure level (OSPL) display better convergence (GCI of 0.015%, 2.2%, and 0%, respectively) than torque (9.02%). Convergence improves at TSR=2.23 compared to 1.12 and 2.97 (GCI as low as 0.015% versus 1.501% and 0.104%). Upwind-to-downwind thrust ratios increase from 1.3 at TSR=0.37 to 17.6 at TSR=2.97, driven by intensified blade–wake interactions at higher TSRs. The unsteady loading that arises at these conditions also elevates noise levels, particularly near the most upstream azimuth sector (90 ◦ - 120 ◦ ), where blade loading peaks in a single rotation. Supplementary Material File (vawt_richardson_extrapolation.pdf) Download 8.21 MB Information & Authors Information Version history V1 Version 1 28 March 2025 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords aeroacoustics aerodynamics blade-vortex interaction grid convergence lattice boltzmann method richardson extrapolation tip speed ratio vertical axis wind turbines Authors Affiliations Shubham Shubham [email protected] Cranfield University View all articles by this author Nigel Wright 0000-0002-1289-2830 University of Birmingham View all articles by this author Anton Ianakiev Nottingham Trent University View all articles by this author Metrics & Citations Metrics Article Usage 204 views 181 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Shubham Shubham, Nigel Wright, Anton Ianakiev. Richardson extrapolation method applied to aerodynamic and aeroacoustic characteristics of vertical axis wind turbine using Lattice Boltzmann Method. Authorea . 28 March 2025. DOI: https://doi.org/10.22541/au.174315449.90660013/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. 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