{"id":{"repo_id":"liege","oai_identifier":"oai:orbi.ulg.ac.be:2268/33766"},"canonical_url":"https://search.dev.ndltd.org/etd/liege/oai:orbi.ulg.ac.be:2268/33766","repository":{"repo_id":"liege","name":"Université de Liège","base_url":"https://orbi.uliege.be/oai/request"},"display":{"title":"Etude expérimentale des sons auto-entretenus produits par un jet issu d'un conduit et heurtant une plaque fendue","abstract":"The production of self-sustained tones (up to 125 dB) by a low Mach number free plane jet impinging on a slotted plate, known as slot-tone, is experimentally studied. For all geometries of the slot’s edge tested, the tones are generated from 6 m/s and when a resonant mode of the duct from which the jet flows out is excited. The Strouhal number associated with the tones fundamental frequency describes stages. These one are linked to the number of vortices present, with vortex pairing possibilities. On the other hand, the frequency domain of the fundamental is defined by the two instability modes of the jet. If the edge of the slot is beveled and if this one is placed backwards to the flow, the tones occurs at a lower speed (3.5 m/s) as soon as the jet becomes turbulent, and the excitation of an acoustic resonator is then not necessary.","abstract_html":"The production of self-sustained tones (up to 125 dB) by a low Mach number free plane jet impinging on a slotted plate, known as slot-tone, is experimentally studied. For all geometries of the slot’s edge tested, the tones are generated from 6 m/s and when a resonant mode of the duct from which the jet flows out is excited. The Strouhal number associated with the tones fundamental frequency describes stages. These one are linked to the number of vortices present, with vortex pairing possibilities. On the other hand, the frequency domain of the fundamental is defined by the two instability modes of the jet. If the edge of the slot is beveled and if this one is placed backwards to the flow, the tones occurs at a lower speed (3.5 m/s) as soon as the jet becomes turbulent, and the excitation of an acoustic resonator is then not necessary.","abstract_has_math":false,"creators":["Billon, Alexis"],"institution":"Université de La Rochelle","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Sakout, Anas","Valeau, Vincent"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2003,"date_issued":"2003-11-21","date_published":"2003-11-21","updated_at":"2026-07-24T02:49:22Z","subjects":["Aeroacoustics","Self-sustained tones","slot-tone","Engineering, computing & technology","Mechanical engineering","Ingénierie, informatique & technologie","Ingénierie mécanique"],"languages":["fr"],"rights":["open access","info:eu-repo/semantics/openAccess"],"rights_urls":["http://purl.org/coar/access_right/c_abf2"],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["info:hdl:2268/33766"],"render_values":[{"text":"info:hdl:2268/33766","href":null,"code":true}]}]},"links":{"outbound_url":"https://orbi.uliege.be/handle/2268/33766","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Sakout, Anas","Valeau, Vincent"]},{"key":"dc:creator","label":"Author","values":["Billon, Alexis"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2003-11-21"]},{"key":"dc:publisher","label":"Institution","values":["Université de La Rochelle"]},{"key":"dc:type","label":"Dc Type","values":["doctoral thesis","http://purl.org/coar/resource_type/c_db06","info:eu-repo/semantics/doctoralThesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Aeroacoustics","Self-sustained tones","slot-tone","Engineering, computing & technology","Mechanical engineering","Ingénierie, informatique & technologie","Ingénierie mécanique"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["fr"]},{"key":"dc:rights","label":"Dc Rights","values":["open access","http://purl.org/coar/access_right/c_abf2","info:eu-repo/semantics/openAccess"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://orbi.uliege.be/handle/2268/33766","info:hdl:2268/33766","https://orbi.uliege.be/bitstream/2268/33766/1/these.pdf"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The production of self-sustained tones (up to 125 dB) by a low Mach number free plane jet impinging on a slotted plate, known as slot-tone, is experimentally studied. For all geometries of the slot’s edge tested, the tones are generated from 6 m/s and when a resonant mode of the duct from which the jet flows out is excited. The Strouhal number associated with the tones fundamental frequency describes stages. These one are linked to the number of vortices present, with vortex pairing possibilities. On the other hand, the frequency domain of the fundamental is defined by the two instability modes of the jet. If the edge of the slot is beveled and if this one is placed backwards to the flow, the tones occurs at a lower speed (3.5 m/s) as soon as the jet becomes turbulent, and the excitation of an acoustic resonator is then not necessary."]},{"key":"dc:format","label":"Dc Format","values":["118"]},{"key":"dc:title","label":"Title","values":["Etude expérimentale des sons auto-entretenus produits par un jet issu d'un conduit et heurtant une plaque fendue","Experimental study of self-sustained tones produced by a jet flowing out from a duct and impinging on a slotted plate"]}]}],"canonical_facts":{"dc:contributor":["Sakout, Anas","Valeau, Vincent"],"dc:creator":["Billon, Alexis"],"dc:date":["2003-11-21"],"dc:description":["The production of self-sustained tones (up to 125 dB) by a low Mach number free plane jet impinging on a slotted plate, known as slot-tone, is experimentally studied. For all geometries of the slot’s edge tested, the tones are generated from 6 m/s and when a resonant mode of the duct from which the jet flows out is excited. The Strouhal number associated with the tones fundamental frequency describes stages. These one are linked to the number of vortices present, with vortex pairing possibilities. On the other hand, the frequency domain of the fundamental is defined by the two instability modes of the jet. If the edge of the slot is beveled and if this one is placed backwards to the flow, the tones occurs at a lower speed (3.5 m/s) as soon as the jet becomes turbulent, and the excitation of an acoustic resonator is then not necessary."],"dc:format":["118"],"dc:identifier":["https://orbi.uliege.be/handle/2268/33766","info:hdl:2268/33766","https://orbi.uliege.be/bitstream/2268/33766/1/these.pdf"],"dc:language":["fr"],"dc:publisher":["Université de La Rochelle"],"dc:rights":["open access","http://purl.org/coar/access_right/c_abf2","info:eu-repo/semantics/openAccess"],"dc:subject":["Aeroacoustics","Self-sustained tones","slot-tone","Engineering, computing & technology","Mechanical engineering","Ingénierie, informatique & technologie","Ingénierie mécanique"],"dc:title":["Etude expérimentale des sons auto-entretenus produits par un jet issu d'un conduit et heurtant une plaque fendue","Experimental study of self-sustained tones produced by a jet flowing out from a duct and impinging on a slotted plate"],"dc:type":["doctoral thesis","http://purl.org/coar/resource_type/c_db06","info:eu-repo/semantics/doctoralThesis"]},"updated_at":"2026-07-24T02:49:22Z"}