Non-contact ultrasonic gas flow metering using air-coupled leaky Lamb waves

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dc.contributor.authorFan, Zichuan
dc.contributor.authorJiang, Wentao
dc.contributor.authorWright, William M. D.
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderFundamental Research Funds for the Central Universities, People’s Republic of China
dc.date.accessioned2018-05-15T11:17:02Z
dc.date.available2018-05-15T11:17:02Z
dc.date.issued2018-04-23
dc.date.updated2018-05-01T09:02:58Z
dc.description.abstractThis paper describes a completely non-contact ultrasonic method of gas flow metering using air-coupled leaky Lamb waves. To show proof of principle, a simplified representation of gas flow in a duct, comprising two separated thin isotropic plates with a gas flowing between them, has been modelled and investigated experimentally. An airborne compression wave emitted from an air-coupled capacitive ultrasonic transducer excited a leaky Lamb wave in the first plate in a non-contact manner. The leakage of this Lamb wave crossed the gas flow at an angle between the two plates as a compression wave, and excited a leaky Lamb wave in the second plate. An air-coupled capacitive ultrasonic transducer on the opposite side of this second plate then detected the airborne compression wave leakage from the second Lamb wave. As the gas flow shifted the wave field between the two plates, the point of Lamb wave excitation in the second plate was displaced in proportion to the gas flow rate. Two such measurements, in opposite directions, formed a completely non-contact contra-propagating Lamb wave flow meter, allowing measurement of the flow velocity between the plates. A COMSOL Multiphysics® model was used to visualize the wave fields, and accurately predicted the time differences that were then measured experimentally. Experiments using different Lamb wave frequencies and plate materials were also similarly verified. This entirely non-contact airborne approach to Lamb wave flow metering could be applied in place of clamp-on techniques in thin-walled ducts or pipes.en
dc.description.sponsorshipFundamental Research Funds for the Central Universities, People’s Republic of China (No. XDJK2016C150)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationFan, Z., Jiang, W. and Wright, W. M. D. (2018) 'Non-contact ultrasonic gas flow metering using air-coupled leaky Lamb waves', Ultrasonics, 89, pp. 74-83. doi:10.1016/j.ultras.2018.04.008en
dc.identifier.doi10.1016/j.ultras.2018.04.008
dc.identifier.endpage83en
dc.identifier.issn0041-624X
dc.identifier.journaltitleUltrasonicsen
dc.identifier.startpage74en
dc.identifier.urihttps://hdl.handle.net/10468/6105
dc.identifier.volume89en
dc.language.isoenen
dc.publisherElsevier B.V.en
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Research Frontiers Programme (RFP)/11/RFP.1/ECE/3119/IE/Ultrasecure short-range wireless communication using ultrasound/en
dc.rights© 2018, Elsevier B.V. All rights reserved. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.en
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectNon-contact flow meteringen
dc.subjectAir-coupled leaky Lamb wavesen
dc.subjectAirborne ultrasounden
dc.subjectUltrasonic wave visualizationen
dc.subjectCOMSOL Multiphysics® modelen
dc.titleNon-contact ultrasonic gas flow metering using air-coupled leaky Lamb wavesen
dc.typeArticle (peer-reviewed)en
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