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EFFECTS OF EDGE GEOMETRY ON FLOW PAST THE DEEP, CIRCULAR, AXISYMMETRIC CAVITY: ANALYSIS OF THE FIRST DIAMETRAL ACOUSTIC MODE

Barannyk, Oleksandr and Gröning, Stefan and Armbruster, Wolfgang and Hardi, Justin (2016) EFFECTS OF EDGE GEOMETRY ON FLOW PAST THE DEEP, CIRCULAR, AXISYMMETRIC CAVITY: ANALYSIS OF THE FIRST DIAMETRAL ACOUSTIC MODE. 11th International conference on Flow-Induced Vibration (FIV 2016), 4. - 6. Jul. 2016, Den Haag, NL.

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Abstract

In this paper, the phenomenon of aeroacoustic resonance due to the flow past a deep, circular, axisymmetric cavity with a depth much larger than its width or length is investigated. Several representative cases of the internal cavity geometry that involved chamfers of various lengths of the upstream and the downstream edges of the cavity, as well as a reference case with sharp, 90° edges were analyzed. The acoustic mode shapes, as well as the distribution of acoustic particle velocity, were reconstructed using the dynamic pressure data while the flow velocity in the vicinity of the cavity opening and distribution of the turbulent intensities, as well as shear stress over the cavity length, were measured using digital particle image velocimetry (PIV). This combined approach allowed to determine the effect of chamfered edges on acoustic response of the system, evolution of the cavity free shear layers, and on the azimuthal characteristics of the first acoustic diametral mode of the cavity.

Item URL in elib:https://elib.dlr.de/133474/
Document Type:Conference or Workshop Item (Speech)
Title:EFFECTS OF EDGE GEOMETRY ON FLOW PAST THE DEEP, CIRCULAR, AXISYMMETRIC CAVITY: ANALYSIS OF THE FIRST DIAMETRAL ACOUSTIC MODE
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Barannyk, OleksandrUniversity of Victoria, Dep. of Mechn. Eng., Victoria, CanadaUNSPECIFIED
Gröning, StefanDLR Lampoldshausen, Institut für Raumfahrtantriebe, DUNSPECIFIED
Armbruster, WolfgangWolfgang.Armbruster (at) dlr.dehttps://orcid.org/0000-0002-4859-4173
Hardi, JustinJustin.Hardi (at) dlr.dehttps://orcid.org/0000-0003-3258-5261
Date:2016
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:PIV, Diametral acoustic mode, circularcavity
Event Title:11th International conference on Flow-Induced Vibration (FIV 2016)
Event Location:Den Haag, NL
Event Type:international Conference
Event Dates:4. - 6. Jul. 2016
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Antriebsystemtechnik - Schubkammertechnologie
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Rocket Propulsion
Deposited By: Hanke, Michaela
Deposited On:14 Jan 2020 08:41
Last Modified:14 Jan 2020 08:41

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