Imperial College London
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Dr Konstantinos Steiros

Faculty of Engineering, Department of Aeronautics

Lecturer in Experimental Fluid Mechanics
 
 
 
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Contact

 

k.steiros

 
 
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Location

 

420bCity and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Steiros:2020:10.1017/jfm.2020.606,
author = {Steiros, K and Kokmanian, K and Bempedelis, N and Hultmark, M},
doi = {10.1017/jfm.2020.606},
journal = {Journal of Fluid Mechanics},
pages = {R2--1--R2--11},
title = {The effect of porosity on the drag of cylinders},
url = {http://dx.doi.org/10.1017/jfm.2020.606},
volume = {901},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - It is well known that perforation of a flat plate reduces its drag when exposed to a flow. However, studies have shown an opposite effect in the case of cylinders. Such a counterintuitive result can have significant consequences on the momentum modelling often used for wind turbine performance predictions, where increased porosity is intrinsically linked to lower drag. Here, a study of the drag of various types of porous cylinders, bars and plates under steady laminar inflow is presented. It is shown that, for most cases, the drag decreases with increased porosity. Only special types of perforations can increase the drag on both cylinders and bars, either by enhancing the effect of the rear half of the models or by organizing the wake structures. These rare occurrences are not relevant to wind turbine modelling, which indicates that current momentum models exhibit the qualitatively correct behaviour.
AU  - Steiros,K
AU  - Kokmanian,K
AU  - Bempedelis,N
AU  - Hultmark,M
DO  - 10.1017/jfm.2020.606
EP  - 1
PY  - 2020///
SN  - 0022-1120
SP  - 2
TI  - The effect of porosity on the drag of cylinders
T2  - Journal of Fluid Mechanics
UR  - http://dx.doi.org/10.1017/jfm.2020.606
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000562108900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/effect-of-porosity-on-the-drag-of-cylinders/B6FA62293B8A5A393FAC33344E54888F
VL  - 901
ER  -
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