Modeling Vertical-Axis Wind Turbine Performance: Blade Element Method vs. Finite Volume Approach

Kozak, Peter; Rempfer, Dietmar

doi:10.2514/6.2014-3861

Cited by 5 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While vertical axis turbines do offer significant operational advantages, their development has been hampered by the difficulty of modelling the associated aerodynamics as well as their rotational kinematics. Article [16] presents the results of a simulation of the baseline VAWT calculated using Star-CCM+, the finite volume method (FVM), and compares them with data obtained from a model with several flow tubes. Limitations of the pipe jet model suggest a low gear ratio because the model cannot reproduce the flow splitting and reattaching cycles that reduce space at high rotation angles.…”

Section: Orthogonal Turbines-review Of Sourcesmentioning

confidence: 99%

Optimization Methods for Wind Turbines

Rotkin

2024

Preprint

View full text Add to dashboard Cite

This article is devoted to overcoming the contradiction between the problem of maximizing the extraction of wind energy as the goal of optimizing wind turbines, and the use of traditional methods based on criteria for the aerodynamic quality of the blades. A modified technique is considered in which the optimization criterion is the directly extracted flow power. It is based on pulse theory methods that use specific power as an optimization criterion. A comparative analysis of the energy efficiency of different types of turbines is carried out, and the effects of blade inversion are considered. A method for calculating multi-rotor turbines based on the concept of uniform power distribution is presented. The compatibility of proprietary and traditional methods is considered by comparing the results of numerical experiments with calculated and experimental data from sources. Optimization computational algorithms generate data from numerical experiments and determine optimal parameter configurations for the turbines under consideration. It is shown that orthogonal Darrieus turbines in high-speed mode provide energy efficiency comparable to collinear turbines, and multi-rotor turbines with power uniformly distributed over the working section are not inferior in energy efficiency to basic turbines, with linear blade velocities halved.

show abstract

Section: Orthogonal Turbines-review Of Sourcesmentioning

confidence: 99%

Optimization Methods for Wind Turbines

Rotkin

2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Although the dynamic stall was early documented by Kramer, 1 it is still an interesting topic among aerodynamicists due to its massive effects on aerodynamic and structural performance. These effects were observed by a series of research leading to challenging applications, including helicopter rotor blades, 2–5 highly maneuverable fixed-wing aircrafts, 6 wind turbines, 7–9 compressor, 10–14 flapping wings, 15–21 and laminar separation flutter. 22–24 Figure 1 shows an illustration of static and dynamic stall over an airfoil surface at an angle of attack ranging from small to high values.…”

Section: Introductionmentioning

confidence: 98%

Low order modeling of dynamic stall using vortex particle method and dynamic mode decomposition

Nguyen

Duong

Trinh

et al. 2023

International Journal of Micro Air Vehicles

View full text Add to dashboard Cite

Low order modelings are performed in this paper, including iterative Brinkman penalized vortex method (IBVM) and data-driven dynamic mode decomposition (DMD) for dynamic stall study of symmetric airfoil. The data are extracted from IBVM as input for flow field reconstruction using combinations of DMD dominant modes, representing extracted flow features. The primary mode together with its harmonics, and the mean mode are termed to be dominant for the airfoil wake duplication at fixed angles of attack ([Formula: see text]) ranging from [Formula: see text] to [Formula: see text]. For the dynamic stall duplication, at small and large pitching amplitudes, the nearfield and farfield vorticty contours from the DMD generally agree well with those from the IBVM. In addition, the lift coefficient from the DMD collapses well with that from the IBVM and the experiment.

show abstract

“…It also stated that the turbulence models produce more accurate results at lower tip-speed ratios. Analysis of blade-vortex interaction (BVI) and its effect on the fluid flow as the blade passes through its own wake from the previous passage showed this effect was significant even for rotor-level loads (Kozak et al, 2014;Posa and Balaras, 2018).…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic model comparison for an X-shaped vertical-axis wind turbine

Giri Ajay,

Morgan,

et al. 2024

Wind Energ. Sci.

View full text Add to dashboard Cite

Abstract. This article presents a comparison study of different aerodynamic models for an X-shaped vertical-axis wind turbine and offers insight into the 3D aerodynamics of this rotor at fixed pitch offsets. The study compares six different numerical models: a double-multiple streamtube (DMS) model, a 2D actuator cylinder (2DAC) model, an inviscid free vortex wake model (from CACTUS), a free vortex wake model with turbulent vorticity (from QBlade), a blade-resolved unsteady Reynolds-averaged Navier–Stokes (URANS) model, and a lattice Boltzmann method (from PowerFLOW). All models, except URANS and PowerFLOW use the same blade element characteristics other than the number of blade elements. This comparison covers the present rotor configuration for several tip-speed ratios and fixed blade pitch offsets without unsteady corrections, except for the URANS and PowerFLOW which cover a single case. The results show that DMS and 2DAC models are inaccurate – especially at highly loaded conditions, are unable to predict the downwind blade vortex interaction, and do not capture the vertical/axial induction this rotor exhibits. The vortex models are consistent with each other, and the differences when compared against the URANS and PowerFLOW mostly arise due to the unsteady and flow curvature effects. Furthermore, the influence of vertical induction is very prominent for this rotor, and this effect becomes more significant with fixed pitch offsets where the flow at the blade root is considerably altered.

show abstract

Modeling Vertical-Axis Wind Turbine Performance: Blade Element Method vs. Finite Volume Approach

Cited by 5 publications

References 10 publications

Optimization Methods for Wind Turbines

Optimization Methods for Wind Turbines

Low order modeling of dynamic stall using vortex particle method and dynamic mode decomposition

Aerodynamic model comparison for an X-shaped vertical-axis wind turbine

Contact Info

Product

Resources

About