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Viscous flow and dynamic stall effects on vertical-axis wind turbines

A. Allet, Ion Paraschivoiu

Article (1995)

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The present paper describes a numerical method, aimed to simulate the flow field of vertical-axis wind turbines, based on the solution of the steady, incompressible, laminar Navier-Stokes equations in cylindrical coordinates. The flow equations, written in conservation law form, are discretized using a control volume approach on a staggered grid. The effect of the spinning blades is simulated by distributing a time-averaged source terms in the ring of control volumes that lie in the path of turbine blades. The numerical procedure used here, based on the control volume approach, is the widely known "SIMPLER" algorithm. The resulting algebraic equations are solved by the TriDiagonal Matrix Algorithm (TDMA) in the r- and z-directions and the Cyclic TDMA in the 0-direction. The indicial model is used to simulate the effect of dynamic stall at low tip-speed ratio values. The viscous model, developed here, is used to predict aerodynamic loads and performance for the Sandia 17-m wind turbine. Predictions of the viscous model are compared with both experimental data and results from the CARDAAV aerodynamic code based on the Double-Multiple Streamtube Model. According to the experimental results, the analysis of local and global performance predictions by the 3D viscous model including dynamic stall effects shows a good improvement with respect to previous 2D models.

Uncontrolled Keywords

Wind turbines; Navier-Stokes; Dynamic stall; Aerodynamics; Finite volume

Subjects: 2100 Mechanical engineering > 2100 Mechanical engineering
2100 Mechanical engineering > 2108 Aerospace, aeronautical and automotive engineering
Department: Department of Mechanical Engineering
PolyPublie URL: https://publications.polymtl.ca/3668/
Journal Title: International Journal of Rotating Machinery (vol. 2, no. 1)
Publisher: Hindawi
DOI: 10.1155/s1023621x95000157
Official URL: https://doi.org/10.1155/s1023621x95000157
Date Deposited: 20 Sep 2019 12:08
Last Modified: 11 Nov 2022 13:44
Cite in APA 7: Allet, A., & Paraschivoiu, I. (1995). Viscous flow and dynamic stall effects on vertical-axis wind turbines. International Journal of Rotating Machinery, 2(1), 1-14. https://doi.org/10.1155/s1023621x95000157


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