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Keywords: turbulence
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Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. April 2022, 144(2): 021010.
Paper No: SOL-21-1099
Published Online: January 11, 2022
... field, a synthetic turbulent flow field using the Mann model (MM), and a steady-state mean wind profile with shear, are integrated with the free vortex filament wake method to investigate the effect of wind field generation methods on the wind turbine performance where the impact of the turbine...
Journal Articles
Article Type: Research-Article
J. Sol. Energy Eng. June 2016, 138(3): 031010.
Paper No: SOL-15-1245
Published Online: April 5, 2016
..., IEC 61400-1 (third edition), describes how this should be done using a simplified, equivalent wind climate established from the on-site distribution functions of the horizontal mean wind speeds, the 90% quantile of turbulence along with average values of vertical wind shear and air density...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. February 2012, 134(1): 011006.
Published Online: November 1, 2011
...S. Jafari; N. Chokani; R. S. Abhari The accurate modeling of the wind resource over complex terrain is required to optimize the micrositing of wind turbines. In this paper, an immersed boundary method that is used in connection with the Reynolds-averaged Navier–Stokes equations with k-ω turbulence...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. May 2011, 133(2): 021002.
Published Online: March 22, 2011
... as a function of Reynolds number; this correlation is considered adequate for the design of BIPV/T systems where forced convection dominates. Local Nusselt number distributions are also presented for laminar and turbulent flow conditions. 14 10 2009 20 07 2010 22 03 2011 22 03 2011...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. February 2011, 133(1): 011011.
Published Online: February 3, 2011
...Matthieu Tusch; Christian Masson; Pierre Héraud This paper presents a numerical study of turbulent atmospheric flow around tubular and lattice meteorological masts and a wind speed and energy uncertainty calculation method based on the numerical results. The flow is described by the Reynolds...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. November 2010, 132(4): 041014.
Published Online: October 14, 2010
... production. The dynamic wake meandering (DWM) model has been developed on this background, and the basic physical mechanisms in the wake—i.e., the velocity deficit, the meandering of the deficit, and the added turbulence—are modeled as simply as possible in order to make fast computations. In the present...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. August 2008, 130(3): 031020.
Published Online: July 18, 2008
... equations, complemented by the k ‐ ϵ turbulence model, with special treatment of the ground boundary to account for very large roughness lengths such as forest. The computational model is solved using FLUENT . A complex site, Riviere au Renard, located in Gaspesie, QC, Canada, has been selected and data...
Journal Articles
Article Type: Technical Briefs
J. Sol. Energy Eng. November 2006, 128(4): 574–579.
Published Online: July 18, 2006
...Korn Saranyasoontorn; Lance Manuel In an earlier study, the authors discussed the efficiency of low-dimensional representations of inflow turbulence random fields in predicting statistics of wind turbine loads that included blade and tower bending moments. Both root-mean-square and 10 - min extreme...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. November 2005, 127(4): 553–562.
Published Online: July 7, 2005
...Korn Saranyasoontorn; Lance Manuel A demonstration of the use of Proper Orthogonal Decomposition (POD) is presented for the identification of energetic modes that characterize the spatial random field describing the inflow turbulence experienced by a wind turbine. POD techniques are efficient...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. November 2005, 127(4): 464–474.
Published Online: June 23, 2005
... for the NREL Phase VI rotor. At low wind speeds ( ∼ 7 m ∕ s ) where the flow is fully attached, even an algebraic turbulence model based simulation gives good agreement with measurements. When the flow is massively separated (wind speed of 20 m ∕ s or above), many of the computed quantities become insensitive...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. November 2005, 127(4): 475–487.
Published Online: June 2, 2005
... vortex sheet of a two-bladed rotor and accounts for the far-field. This coupling methodology reduces both numerical diffusion and computational cost. The parallelized coupled solver (PCS) is applied to the NREL Phase VI rotor configuration under no-yaw conditions. Fully turbulent flow is assumed using...
Journal Articles
Article Type: Article
J. Sol. Energy Eng. May 2005, 127(2): 214–222.
Published Online: April 25, 2005
... around a wind turbine airfoil using the k − ω SST and Detached Eddy Simulation (DES) turbulence models, as well as an engineering semiempirical dynamic stall model, are conducted. The computational results are compared to the experimental results that are available for both the static airfoil...
Journal Articles
Article Type: Article
J. Sol. Energy Eng. May 2005, 127(2): 223–233.
Published Online: April 25, 2005
... that essentially describe the complex flow around a blade/VG configuration, a spanwise averaging procedure is applied, resulting in an equivalent set of two-dimensional equations, enriched with extra source terms. These terms are modelled using elementary vortex flow theory. In turbulent flows, the production term...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. February 2006, 128(1): 45–53.
Published Online: February 25, 2005
... for the first time. The standard κ - ε turbulence model, with a moving mesh to reflect the reciprocating motion of the pistons, has been employed for the analysis of the engine’s working process. The gas temperature and pressure distributions and velocity fields in the internal gas circuit of the machine have...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. November 2005, 127(4): 444–455.
Published Online: February 18, 2005
... of the probability density function (PDF) of turbulence driven short-term extreme wind shear events, conditioned on the mean wind speed, for an arbitrary recurrence period. The model is based on an asymptotic expansion, and only a few and easily accessible parameters are needed as input. The model of the extreme PDF...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. November 2004, 126(4): 1011–1016.
Published Online: November 18, 2004
...–148, Boulder, USA. Yang , S. L. , Chang , Y. L. , and Arici , O. , 1995 , “ Navier-Stokes Computations of the NREL Airfoil Using a k−ω Turbulent Model at High Angles of Attack ,” J. Sol. Energy Eng. , 117 , pp. 304 – 310 . Bertagnolio, F., Sørensen, N. N., Johansen, J...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. November 2004, 126(4): 1069–1082.
Published Online: November 18, 2004
... inflow of the LIST turbine by estimating the coherence for the three turbulence components (along-wind, across-wind, and vertical). We examine coherence spectra for both lateral and vertical separations and use the available ten-minute time series of the three components at several locations. The data...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. November 2004, 126(4): 986–1001.
Published Online: November 18, 2004
... flow visualization data and performance data taken on the E387 compare favorably with measurements taken at NASA Langley in the Low Turbulence Pressure Tunnel. Highlights of the performance characteristics of the other five airfoils are presented. Oerlemans, S., and Migliore, P., 2004, “Wind Tunnel...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. November 2002, 124(4): 378–386.
Published Online: November 8, 2002
..., a general approach utilizing full integration, where numerical routines are used to directly integrate the conditional short-term load distribution over the annual occurrence of wind speeds and turbulence intensities, is presented. Then starting from this general approach, a qualitative analysis...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. November 2002, 124(4): 387–395.
Published Online: November 8, 2002
...Patrick J. Moriarty; William E. Holley, Consultant,; Sandy Butterfield The effect of varying turbulence levels on long-term loads extrapolation techniques was examined using a joint probability density function of both mean wind speed and turbulence level for loads calculations. The turbulence...