{"id":319996,"date":"2017-05-23T06:24:26","date_gmt":"2017-05-23T10:24:26","guid":{"rendered":"https:\/\/ntrs.nasa.gov\/search.jsp?R=20170004649"},"modified":"2017-05-23T06:24:26","modified_gmt":"2017-05-23T10:24:26","slug":"increased-jet-noise-due-to-a-nominally-laminar-state-of-nozzle-exit-boundary-layer","status":"publish","type":"post","link":"https:\/\/spaceweekly.com\/?p=319996","title":{"rendered":"Increased Jet Noise Due to a &#8220;Nominally Laminar&#8221; State of Nozzle Exit Boundary Layer"},"content":{"rendered":"<p>Abstract: A set of 2-in. diameter nozzles is used to investigate the effect of varying exit boundary layer state on the radiated noise from high-subsonic jets. It is confirmed that nozzles involving turbulent boundary layers are the quietest while nozzles involving a &#8220;nominally laminar&#8221; boundary layer are loud especially on the high-frequency side of the sound pressure level spectrum. The latter boundary layer state involves a &#8220;Blasius-like&#8221; mean velocity profile but higher turbulence intensities compa&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Abstract: A set of 2-in. diameter nozzles is used to investigate the effect of varying exit boundary layer state on the radiated noise from high-subsonic jets. It is confirmed that nozzles involving turbulent boundary layers are the quietest while nozz&#8230;<\/p>\n","protected":false},"author":60,"featured_media":615444,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-319996","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/319996","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/users\/60"}],"replies":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=319996"}],"version-history":[{"count":1,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/319996\/revisions"}],"predecessor-version":[{"id":319997,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/319996\/revisions\/319997"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/media\/615444"}],"wp:attachment":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=319996"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=319996"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=319996"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}