Numerical simulation of VAWT stochastic aerodynamic loads produced by atmospheric turbauence: VAWT-SAL code

Homicz, Gregory F.

doi:10.2172/5177561

Cited by 16 publications

(7 citation statements)

References 11 publications

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“…At s ¼ 0.2, the entire torque is low and negative values can be seen at the low TSRs of 1.8 and 2.2. This negative torque of the low solidity H-Darrieus makes self-starting of the wind turbine difficult [14], thereby requiring considerable time to reach the operational TSR. Therefore, the low solidity H-Darrieus is not suitable as a self-starting wind turbine, but suitable as an induction-type wind turbine.…”

Section: Resultsmentioning

confidence: 99%

“…Homicz [14] used a numerical code called VAWT-SAL (VAWT Stochastic Aerodynamic Load), which used a DMST (double-multiple-stream tube)) method and numerically estimates the random loads created by atmospheric turbulence. Homicz found the output power to decrease slightly with increased turbulence intensity, while for TSRs near the maximum power coefficient, power increased as the turbulence level was raised.…”

Section: Introductionmentioning

confidence: 99%

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Aerodynamic characteristics of two-bladed H-Darrieus at various solidities and rotating speeds

Joo

Choi

Lee

2015

Energy

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Aerodynamic characteristics of two-bladed H-Darrieus at various solidities and rotating speeds

Joo

Choi

Lee

2015

Energy

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“…This gives the surface two properties that are very useful. First it is a solid surface, partitioning the flow into regions, and secondly the surface relates (approximately) to the boundaries of stream tubes, when you realize that a stream tube can be any arbitrary shape [Hom91].…”

Section: Domain Expert Evaluationmentioning

confidence: 99%

Automatic Stream Surface Seeding: A Feature Centered Approach

Edmunds

Laramee

Malki

et al. 2012

Computer Graphics Forum

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The ability to capture and visualize information within the flow poses challenges for visualizing 3D flow fields. Stream surfaces are one of many useful integration based techniques for visualizing 3D flow. However seeding integral surfaces can be challenging. Previous research generally focuses on manual placement of stream surfaces. Little attention has been given to the problem of automatic stream surface seeding. This paper introduces a novel automatic stream surface seeding strategy based on vector field clustering. It is important that the user can define and target particular characteristics of the flow. Our framework provides this ability. The user is able to specify different vector clustering parameters enabling a range of abstraction for the density and placement of seeding curves and their associated stream surfaces. We demonstrate the effectiveness of this automatic stream surface approach on a range of flow simulations and incorporate illustrative visualization techniques. Domain expert evaluation of the results provides valuable insight into the users requirements and effectiveness of our approach.

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“…In one sense, the price paid for structural simplicity is aerodynamic com-plexity: VAWT aerodynamics is inherently unsteady, and highly nonlinear. However, the relatively recent development of several methods capable of predicting steadystate performance has greatly in-creased our understanding of VAWT aerodynamics [2].…”

Section: Introductionmentioning

confidence: 99%

Double Multiple Streamtube Model and Numerical Analysis of Vertical Axis Wind Turbine

Beri¹,

Yao²

2011

EPE

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The present paper contributes to the modeling of unsteady flow analysis of vertical axis wind turbine (VAWT). Double multiple streamtube (DSMT) model was applied for the performance prediction of straight bladed fixed pitch VAWT using NACA0018 airfoil at low wind speed. A moving mesh technique was used to investigate two-dimensional unsteady flow around the same VAWT model with NACA0018 airfoil modified to be flexible at 150 from the main blade axis of the turbine at the trailing edge located about 70 % of the blade chord length using fluent solving Reynolds average Navier-strokes equation. The results obtained from DMST model and the simulation results were then compared. The result shows that the CFD simulation with airfoil modified has shown better performance at low tip speed ratios for the modeled turbine

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Numerical simulation of VAWT stochastic aerodynamic loads produced by atmospheric turbauence: VAWT-SAL code

Cited by 16 publications

References 11 publications

Aerodynamic characteristics of two-bladed H-Darrieus at various solidities and rotating speeds

Aerodynamic characteristics of two-bladed H-Darrieus at various solidities and rotating speeds

Automatic Stream Surface Seeding: A Feature Centered Approach

Double Multiple Streamtube Model and Numerical Analysis of Vertical Axis Wind Turbine

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