On the interaction between turbulence grids and boundary layers

Turbulence grids are widely used in wind tunnels to produce representative turbulence levels when testing aerodynamic phenomena around models. Although the purpose of the grid is to introduce a desired turbulence level in the freestream flow, the wall boundary layers of the tunnel are subjected to m...

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Main Authors: Irps Thomas, Kanjirakkad Vasudevan
Format: Article
Language:English
Published: EDP Sciences 2016-01-01
Series:EPJ Web of Conferences
Online Access:http://dx.doi.org/10.1051/epjconf/201611402048
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spelling doaj-5d51d0e984ca49b2ab75a15195880f232021-08-02T02:44:33ZengEDP SciencesEPJ Web of Conferences2100-014X2016-01-011140204810.1051/epjconf/201611402048epjconf_efm2016_02048On the interaction between turbulence grids and boundary layersIrps ThomasKanjirakkad VasudevanTurbulence grids are widely used in wind tunnels to produce representative turbulence levels when testing aerodynamic phenomena around models. Although the purpose of the grid is to introduce a desired turbulence level in the freestream flow, the wall boundary layers of the tunnel are subjected to modification due to the presence of such grids. This could have major implications to the flow around the models to be tested and hence there is a need to further understand this interaction. The study described in this paper examines wind tunnel wall boundary layer modification by turbulence grids of different mesh sizes and porosities to understand the effect of these parameters on such interaction. Experimental results are presented in the form of pressure loss coefficients, boundary layer velocity profiles and the statistics of turbulence modification.http://dx.doi.org/10.1051/epjconf/201611402048
collection DOAJ
language English
format Article
sources DOAJ
author Irps Thomas
Kanjirakkad Vasudevan
spellingShingle Irps Thomas
Kanjirakkad Vasudevan
On the interaction between turbulence grids and boundary layers
EPJ Web of Conferences
author_facet Irps Thomas
Kanjirakkad Vasudevan
author_sort Irps Thomas
title On the interaction between turbulence grids and boundary layers
title_short On the interaction between turbulence grids and boundary layers
title_full On the interaction between turbulence grids and boundary layers
title_fullStr On the interaction between turbulence grids and boundary layers
title_full_unstemmed On the interaction between turbulence grids and boundary layers
title_sort on the interaction between turbulence grids and boundary layers
publisher EDP Sciences
series EPJ Web of Conferences
issn 2100-014X
publishDate 2016-01-01
description Turbulence grids are widely used in wind tunnels to produce representative turbulence levels when testing aerodynamic phenomena around models. Although the purpose of the grid is to introduce a desired turbulence level in the freestream flow, the wall boundary layers of the tunnel are subjected to modification due to the presence of such grids. This could have major implications to the flow around the models to be tested and hence there is a need to further understand this interaction. The study described in this paper examines wind tunnel wall boundary layer modification by turbulence grids of different mesh sizes and porosities to understand the effect of these parameters on such interaction. Experimental results are presented in the form of pressure loss coefficients, boundary layer velocity profiles and the statistics of turbulence modification.
url http://dx.doi.org/10.1051/epjconf/201611402048
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AT kanjirakkadvasudevan ontheinteractionbetweenturbulencegridsandboundarylayers
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