{"id":277951,"date":"2017-02-21T06:19:47","date_gmt":"2017-02-21T10:19:47","guid":{"rendered":"https:\/\/ntrs.nasa.gov\/search.jsp?R=20170001638"},"modified":"2017-02-21T06:19:47","modified_gmt":"2017-02-21T10:19:47","slug":"advanced-noise-control-fan-a-20-year-retrospective","status":"publish","type":"post","link":"https:\/\/spaceweekly.com\/?p=277951","title":{"rendered":"Advanced Noise Control Fan: A 20-Year Retrospective"},"content":{"rendered":"<p>Abstract: The ANCF test bed is used for evaluating fan noise reduction concepts, developing noise measurement technologies, and providing a database for Aero-acoustic code development. Rig Capabilities: 4 foot 16 bladed rotor @ 2500 rpm, Auxiliary air delivery system (3 lbm\/sec @ 6\/12 psi), Variable configuration (rotor pitch angle, stator count\/position, duct length), synthetic acoustic noise generation (tone\/broadband). Measurement Capabilities: 112 channels dynamic data system, Unique rotating rake &#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Abstract: The ANCF test bed is used for evaluating fan noise reduction concepts, developing noise measurement technologies, and providing a database for Aero-acoustic code development. Rig Capabilities: 4 foot 16 bladed rotor @ 2500 rpm, Auxiliary air &#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-277951","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/277951","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=277951"}],"version-history":[{"count":1,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/277951\/revisions"}],"predecessor-version":[{"id":277952,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/277951\/revisions\/277952"}],"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=277951"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=277951"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=277951"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}