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Wake vortex mechanisms behind semi-porous cylinders

Aguiar Oliveira Rosa, Joao Aguiar, Pelacci, Manuel and Birch, David (2018) Wake vortex mechanisms behind semi-porous cylinders In: 2018 Applied Aerodynamics Conference, 2018 AIAA Aviation and Aeronautics Forum and Exposition., 25 - 29 June 2018, Atlanta. Georgia.

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Abstract

There has been much recent interest in the combined structural and aerodynamic properties of porous metal foams, but there does not yet appear to be a consensus on the aerodynamic behaviour of these foam materials. A comprehensive analytical and experimental study with special attention to scaling was carried out in order to examine the flow around cylinders coated with porous metal foam and characterize the effects upon the mechanisms governing shear layer separation, vortex shedding and wake formation. Results have yielded a correlation between the distance separating the detaching shear layers and the vorticity losses in the near-wake. It seems that it is the coating configuration, rather than geometry, that influences vortex shedding, and therefore foams affect the flow in a similar way as shrouds or bleeding systems.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Aguiar Oliveira Rosa, Joao Aguiarj.aguiar@surrey.ac.uk
Pelacci, Manuelm.pelacci@surrey.ac.uk
Birch, DavidD.Birch@surrey.ac.uk
Date : 29 June 2018
DOI : 10.2514/6.2018-3002
Copyright Disclaimer : Copyright 2018 AIAA
Depositing User : Melanie Hughes
Date Deposited : 26 Jul 2018 09:22
Last Modified : 08 Nov 2018 14:27
URI: http://epubs.surrey.ac.uk/id/eprint/848793

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