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Coherent Structures within the Laminar Separation Bubble on a NACA 0015 Hydrofoil

Miozzi, Massimo and Costantini, Marco and Capone, Alessandro and Klein, Christian and Di Felice, Fabio (2018) Coherent Structures within the Laminar Separation Bubble on a NACA 0015 Hydrofoil. In: 5th International Conference on Experimental Fluid Mechanics 2018 (60), pp. 1-6. Institute of Fluid Mechanics and Aerodynamics, Universität der Bundeswehr München, Germany. 5th International Conference on Experimental Fluid Mechanics, ICEFM, 02.-04. Juli 2018, München, Germany. DOI: 10.18726/2018_2 ISBN 978-3-943207-32-3

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Official URL: https://athene-forschung.unibw.de/doc/124421/124421.pdf

Abstract

Experiments were carried out in the cavitation tunnel CEIMM at INSEAN (Rome) on the suction side of a NACA 0015 hydrofoil model by means of Temperature Sensitive Paint (TSP). The investigations were conducted at angles of attack from 3° to 10° and at a chord Reynolds number of 180,000. A region of recirculating flow was identified confined between laminar separation and turbulent reattachment points; this region is commonly referred to as laminar separation bubble. The non-intrusive TSP approach enabled a description of the flow interaction with the body surface exactly at the wall avoiding appreciable flow perturbations or wall property modifications. In this work the focus is placed on the topology of the coherent structures that appear in the reverse flow inside the recirculating region at different angles of attack. A spatial frequency decomposition in low and high spatial frequency terms was used to separate the scales inside the separation bubble from the embedding environment.

Item URL in elib:https://elib.dlr.de/121781/
Document Type:Conference or Workshop Item (Speech, Other)
Additional Information:https://athene-orschung.unibw.de/doc/124421/124421.pdf Link für Conference Proceedings
Title:Coherent Structures within the Laminar Separation Bubble on a NACA 0015 Hydrofoil
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Miozzi, Massimomassimo.miozzi (at) cnr.itUNSPECIFIED
Costantini, MarcoMarco.Costantini (at) dlr.dehttps://orcid.org/0000-0003-0642-0199
Capone, Alessandroalessandro.capone (at) uniud.itUNSPECIFIED
Klein, Christianchristian.klein (at) dlr.dehttps://orcid.org/0000-0001-7592-6922
Di Felice, Fabiofabio.difelice (at) cnr.itUNSPECIFIED
Date:2 July 2018
Journal or Publication Title:5th International Conference on Experimental Fluid Mechanics 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.18726/2018_2
Page Range:pp. 1-6
Editors:
EditorsEmail
Kähler, Christian J.UniBW München
Hain, RainerUNSPECIFIED
Scharnowski, SvenUNSPECIFIED
Fuchs, ThomasUNSPECIFIED
Publisher:Institute of Fluid Mechanics and Aerodynamics, Universität der Bundeswehr München, Germany
Series Name:Conference Proceedings online
ISBN:978-3-943207-32-3
Status:Published
Keywords:Laminar Separation Bubble, Temperature-Sensitive Paint, Skin Friction
Event Title:5th International Conference on Experimental Fluid Mechanics, ICEFM
Event Location:München, Germany
Event Type:international Conference
Event Dates:02.-04. Juli 2018
Organizer:Universität der Bundeswehr München
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Experimental Methods, GO
Deposited By: Micknaus, Ilka
Deposited On:11 Jan 2019 05:42
Last Modified:11 Jan 2019 05:42

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