Local topography‐induced pressure gradient effects on the wake and power output of a model wind turbine

Wind-tunnel experiments were performed to study the effect of favorable and adverse constant pressure gradients (PG) from local changes in the topography right downwind of a model wind turbine. Particle image velocimetry was used to characterize the near and intermediate wake regions. We explored fi...

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Autores principales:	Tengfei Cai, Shyuan Cheng, Antonio Segalini, Leonardo P. Chamorro
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Topographic effects Pressure gradient Turbine wake Power output Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/83c3dd02507b4f91baf1b73a4897511f
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id	oai:doaj.org-article:83c3dd02507b4f91baf1b73a4897511f
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spelling	oai:doaj.org-article:83c3dd02507b4f91baf1b73a4897511f2021-11-30T04:15:44ZLocal topography‐induced pressure gradient effects on the wake and power output of a model wind turbine2095-034910.1016/j.taml.2021.100297https://doaj.org/article/83c3dd02507b4f91baf1b73a4897511f2021-07-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2095034921001045https://doaj.org/toc/2095-0349Wind-tunnel experiments were performed to study the effect of favorable and adverse constant pressure gradients (PG) from local changes in the topography right downwind of a model wind turbine. Particle image velocimetry was used to characterize the near and intermediate wake regions. We explored five scenarios, two favorable, two adverse PG, and a case with negligible PG. Results show that the PGs induce a wake deflection and modulate the wake. They imposed a relatively small impact on the turbulence kinetic energy and kinematic shear stress but a comparatively dominant effect on the bulk flow on the flow recovery. Based on this, a simple formulation is used to describe the impact of PG on the wake. We modeled the base flow through a linearized perturbation method; the wake is obtained by solving a simplified, integrated streamwise momentum equation. This approach reasonably estimated the flow profile and PG-induced power output variations.Tengfei CaiShyuan ChengAntonio SegaliniLeonardo P. ChamorroElsevierarticleTopographic effectsPressure gradientTurbine wakePower outputEngineering (General). Civil engineering (General)TA1-2040ENTheoretical and Applied Mechanics Letters, Vol 11, Iss 5, Pp 100297- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Topographic effects Pressure gradient Turbine wake Power output Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Topographic effects Pressure gradient Turbine wake Power output Engineering (General). Civil engineering (General) TA1-2040 Tengfei Cai Shyuan Cheng Antonio Segalini Leonardo P. Chamorro Local topography‐induced pressure gradient effects on the wake and power output of a model wind turbine
description	Wind-tunnel experiments were performed to study the effect of favorable and adverse constant pressure gradients (PG) from local changes in the topography right downwind of a model wind turbine. Particle image velocimetry was used to characterize the near and intermediate wake regions. We explored five scenarios, two favorable, two adverse PG, and a case with negligible PG. Results show that the PGs induce a wake deflection and modulate the wake. They imposed a relatively small impact on the turbulence kinetic energy and kinematic shear stress but a comparatively dominant effect on the bulk flow on the flow recovery. Based on this, a simple formulation is used to describe the impact of PG on the wake. We modeled the base flow through a linearized perturbation method; the wake is obtained by solving a simplified, integrated streamwise momentum equation. This approach reasonably estimated the flow profile and PG-induced power output variations.
format	article
author	Tengfei Cai Shyuan Cheng Antonio Segalini Leonardo P. Chamorro
author_facet	Tengfei Cai Shyuan Cheng Antonio Segalini Leonardo P. Chamorro
author_sort	Tengfei Cai
title	Local topography‐induced pressure gradient effects on the wake and power output of a model wind turbine
title_short	Local topography‐induced pressure gradient effects on the wake and power output of a model wind turbine
title_full	Local topography‐induced pressure gradient effects on the wake and power output of a model wind turbine
title_fullStr	Local topography‐induced pressure gradient effects on the wake and power output of a model wind turbine
title_full_unstemmed	Local topography‐induced pressure gradient effects on the wake and power output of a model wind turbine
title_sort	local topography‐induced pressure gradient effects on the wake and power output of a model wind turbine
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/83c3dd02507b4f91baf1b73a4897511f
work_keys_str_mv	AT tengfeicai localtopographyinducedpressuregradienteffectsonthewakeandpoweroutputofamodelwindturbine AT shyuancheng localtopographyinducedpressuregradienteffectsonthewakeandpoweroutputofamodelwindturbine AT antoniosegalini localtopographyinducedpressuregradienteffectsonthewakeandpoweroutputofamodelwindturbine AT leonardopchamorro localtopographyinducedpressuregradienteffectsonthewakeandpoweroutputofamodelwindturbine
_version_	1718406815465603072

Local topography‐induced pressure gradient effects on the wake and power output of a model wind turbine

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