CFD Modeling of an H-Type Darrieus VAWT under High Winds: The Vorticity Index and the Imminent Vortex Separation Condition
-
Published:2023-02-20
Issue:2
Volume:11
Page:644
-
ISSN:2227-9717
-
Container-title:Processes
-
language:en
-
Short-container-title:Processes
Author:
Acosta-López Jansen Gabriel1,
Blasetti Alberto Pedro2,
Lopez-Zamora Sandra1ORCID,
de Lasa Hugo1
Affiliation:
1. Chemical Reactor Engineering Centre, Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, ON N6A 3K7, Canada
2. Departamento de Ingeniería Química, Universidad de Nacional de la Patagonia San Juan Bosco, Comodoro Rivadavia U9005, Chubut, Argentina
Abstract
This study introduces a Vorticity Index (VI) and an Imminent Vortex Separation Condition (IVSC), which are considered valuable indicators to quantify the vorticity impact on vertical axis wind turbines (VAWTs) operation. The VI and IVSC are specifically applied to a H-Darrieus vertical axis wind turbine (VAWT). Findings show that these two parameters display a direct relationship with the aerodynamic forces that govern the performance of this type of VAWT. This analysis is accomplished via 2D-CFD simulations of a H-Darrieus with a symmetrical NACA 0018, powered by high winds (8 and 20 m/s), by using a Shear Stress Transport SST k-ω model. The 2D model used is validated for Class II winds (8 m/s), for tip speed ratios (λ) ranging from 0.4 to 0.9. Power coefficients (Cp) predictions are close to those obtained with both 3D simulations and with experimental data, reported in the technical literature. It is found with the numerical simulations developed, that despite the significant increase of the average rotor overall torque values, when the wind speed is augmented from 8 m/s to 20 m/s, the energy extracted by the rotor seems to be moderately lessened by the amplified turbulence and vorticity.
Funder
Natural Sciences and Engineering Research Council, Canada: HdL Discovery Grant
ELAP Scholarship Program: Jansen Gabriel Acosta-Lopez Scholarship
Compute Canada, Universidad Nacional de La Patagonia, Comodoro Rivadavia, Argentina, Universidad Nacional de Colombia, Manizales-Campus, Colombia
Subject
Process Chemistry and Technology,Chemical Engineering (miscellaneous),Bioengineering
Reference46 articles.
1. The historical aspect of windmills architectural forms transformation;Zayats;Procedia Eng.,2015
2. BP plc (2022, June 30). bp Energy Outlook 2022 Edition. Available online: https://www.bp.com/content/dam/bp/business-sites/en/global/corporate/pdfs/energy-economics/energy-outlook/bp-energy-outlook-2022.pdf.
3. Zhao, D., Han, N., Goh, E., Cater, J., and Reinecke, A. (2019). Wind Turbines and Aerodynamics Energy Harvesters, Academic Press. [1st ed.].
4. Environmental issues associated with wind energy—A review;Dai;Renew Energy,2015
5. Transient analysis of H-type Vertical Axis Wind Turbines using CFD;Maalouly;Energy Rep.,2022
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献