{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/64686"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/64686","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Application of ray acoustics to the propagation of sound in ducts containing sheared flows","abstract":"Ray acoustics has been applied to the propagation of sound waves in a homogeneous moving medium with sheared flow bounded by the hard walls of a duct. Differential equations describing the ray trajectories and spreading losses along each ray were developed and solved numerically for a range of centerline Mach numbers and shear boundary-layers. Results were obtained which show the effects of upstream and downstream sound propagation on the ray paths. A method was also presented which allows the calculation of intensity loss profiles at specified cross-sections of the duct.","abstract_html":"Ray acoustics has been applied to the propagation of sound waves in a homogeneous moving medium with sheared flow bounded by the hard walls of a duct. Differential equations describing the ray trajectories and spreading losses along each ray were developed and solved numerically for a range of centerline Mach numbers and shear boundary-layers. Results were obtained which show the effects of upstream and downstream sound propagation on the ray paths. 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Differential equations describing the ray trajectories and spreading losses along each ray were developed and solved numerically for a range of centerline Mach numbers and shear boundary-layers. Results were obtained which show the effects of upstream and downstream sound propagation on the ray paths. A method was also presented which allows the calculation of intensity loss profiles at specified cross-sections of the duct."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Master of Science"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Application of ray acoustics to the propagation of sound in ducts containing sheared flows"]}]}],"canonical_facts":{"dc:contributor.department":["Mechanical Engineering"],"dc:creator":["Grimm, Denny Warren"],"dc:date.accessioned":["2016-02-01T18:05:35Z"],"dc:date.available":["2016-02-01T18:05:35Z"],"dc:date.issued":["1972"],"dc:description.abstract":["Ray acoustics has been applied to the propagation of sound waves in a homogeneous moving medium with sheared flow bounded by the hard walls of a duct. Differential equations describing the ray trajectories and spreading losses along each ray were developed and solved numerically for a range of centerline Mach numbers and shear boundary-layers. Results were obtained which show the effects of upstream and downstream sound propagation on the ray paths. 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