Propagation characteristics of laser-induced acoustic sources in hybrid anechoic wind tunnels

Simple item page
dc.contributor.authorSzőke, Mátéen
dc.contributor.authorDevenport, William J.en
dc.date.accessioned2022-02-10T14:23:15Zen
dc.date.available2022-02-10T14:23:15Zen
dc.date.issued2021-10-13en
dc.date.updated2022-02-10T14:23:09Zen
dc.description.abstractThe propagation characteristics of an acoustic point source generated using laser-induced plasma (LIP) were investigated experimentally. Experiments were performed in a Kevlar-walled hybrid anechoic wind tunnel (HAWT) where the sound of the LIP was measured using a 251-element microphone array, while the flow speed in the empty test section was varied. The time instant of the LIP formation was also captured. The far field sound pressure was assessed through arrival times (source to microphones) and pressure correction levels, and these quantities were compared against a commonly used shear layer refraction model. A detailed uncertainty assessment is presented on the arrival times and pressure levels. It was found that the time domain analysis was limited by the sampling rate of the analog-to-digital converter regardless of the flow speed. The uncertainty of the pressure levels was limited by the uncertainty of the microphones at low flow speeds, while they increased with flow speed at shallow observer angles. The high-speed Schlieren imaging of the LIP was performed, which revealed that the sound of the LIP reaches the far field microphones over a shorter time duration than modeled because the wave speed was initially supersonic. The discrepancy was found to be comparable to the temporal resolution of the aeroacoustic experiments. The discrepancy between the experimental and theoretical arrival times was found to increase with flow speed, and they were nearly independent of the azimuth angles. The discrepancy between the experimental and theoretical pressure correction ratio was found to be uniform for most observer locations. With an increase in flow speed, the discrepancy became positive at large, and negative at low polar angles. The sound refraction at the Kevlar wall did not change the frequency content of the sound over the investigated range of frequencies (1–10 kHz).en
dc.description.versionAccepted versionen
dc.format.extent16 page(s)en
dc.format.mimetypeapplication/pdfen
dc.identifierARTN 116294 (Article number)en
dc.identifier.doihttps://doi.org/10.1016/j.jsv.2021.116294en
dc.identifier.eissn1095-8568en
dc.identifier.issn0022-460Xen
dc.identifier.orcidSzoke, Tibor [0000-0002-3768-7956]en
dc.identifier.orcidDevenport, William [0000-0002-3413-861X]en
dc.identifier.urihttp://hdl.handle.net/10919/108252en
dc.identifier.volume510en
dc.language.isoenen
dc.publisherAcademic Press-Elsevieren
dc.relation.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000694705100008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=930d57c9ac61a043676db62af60056c1en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectAcousticsen
dc.subjectEngineering, Mechanicalen
dc.subjectMechanicsen
dc.subjectEngineeringen
dc.subjectLaser-induced breakdownen
dc.subjectShear-layeren
dc.subjectRefractionen
dc.subjectAeroacoustic correctionen
dc.subjectUncertainty quantificationen
dc.subjectSHOCK-WAVESen
dc.subjectPLASMAen
dc.subjectSOUNDen
dc.subjectAcousticsen
dc.subject02 Physical Sciencesen
dc.subject09 Engineeringen
dc.titlePropagation characteristics of laser-induced acoustic sources in hybrid anechoic wind tunnelsen
dc.title.serialJournal of Sound and Vibrationen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherArticleen
dc.type.otherJournalen
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Engineeringen
pubs.organisational-group/Virginia Tech/Engineering/Aerospace and Ocean Engineeringen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Engineering/COE T&R Facultyen

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
FinalManuscript.pdf
Size:
2.98 MB
Format:
Adobe Portable Document Format
Description:
Accepted version
Download

Collections

All Faculty Deposits
Scholarly Works, Aerospace and Ocean Engineering