{"id":230019,"date":"2017-06-14T11:30:00","date_gmt":"2017-06-14T11:30:00","guid":{"rendered":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg"},"modified":"2023-06-14T12:51:05","modified_gmt":"2023-06-14T16:51:05","slug":"were-fan-of-reduced-aircraft-noise","status":"inherit","type":"attachment","link":"https:\/\/www.nasa.gov\/image-detail\/were-fan-of-reduced-aircraft-noise\/","title":{"rendered":"We\u2019re a Fan of Reduced Aircraft Noise"},"author":9,"comment_status":"closed","ping_status":"closed","template":"","meta":{"nasa_hds_core_meta_l10n":"en-US","nasa_hds_core_meta_article_editor":"","nasa_hds_core_meta_article_contacts":[],"nasa_hds_core_meta_article_topic":"","nasa_hds_core_meta_linked_locations":[],"nasa_hds_core_meta_article_related_articles":[],"hds_migrate_meta_pr_release_id":"","hds_migrate_meta_pr_release_type":"","nasa_hds_core_meta_location_x":"","nasa_hds_core_meta_location_y":"","nasa_hds_core_meta_gallery_images":[],"nasa_hds_core_meta_video_cc_file_id":"","nasa_hds_core_meta_audio_cc_file_id":""},"media-tags":[12242,12226,10822,12246],"read_time":1,"video_cc_url":"","audio_cc_url":"","credits":"NASA \/ Marvin Smith (Alcyon Technical Services)","original_date":{"stamp":0,"display":""},"description":{"rendered":"<p class=\"attachment\"><a href='https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"240\" src=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?w=300\" class=\"attachment-medium size-medium\" alt=\"A researcher inspecting the fan blade tips on a rotor.\" srcset=\"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg 1041w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?resize=300,240 300w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?resize=768,615 768w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?resize=1024,819 1024w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?resize=400,320 400w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?resize=600,480 600w, https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?resize=900,720 900w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/p>\n<p>How do you reduce aircraft engine noise, so it doesn’t bother the public around airports?  One of the ways is to install acoustic liners around the turbofan rotor. Researcher Rick Bozak inspects fan blade tips on a rotor installed in a test facility at NASA Glenn that simulates the internal engine conditions required to study fan performance.<\/p>\n<p>Modern aircraft engines utilize acoustic liners to reduce noise emissions. Additional acoustic liners installed directly over the fan have the potential to further reduce aircraft noise levels. Fan acoustic liners are one of many aircraft noise reduction concepts being evaluated by NASA’s Advanced Air Transport Technology Project.<\/p>\n"},"caption":{"rendered":"<p>Researcher Rick Bozak inspects fan blade tips on a rotor installed in a test facility at NASA Glenn.<\/p>\n"},"alt_text":"A researcher inspecting the fan blade tips on a rotor.","media_type":"image","mime_type":"image\/jpeg","media_details":{"width":1041,"height":833,"file":"2023\/03\/rotor_blade_tips.jpg","filesize":151264,"sizes":{"thumbnail":{"file":"rotor_blade_tips.jpg?resize=150,150","width":150,"height":150,"filesize":151264,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?w=150&h=150&crop=1"},"medium":{"file":"rotor_blade_tips.jpg?resize=300,240","width":300,"height":240,"filesize":151264,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?w=300"},"medium_large":{"file":"rotor_blade_tips.jpg?resize=768,615","width":768,"height":615,"filesize":151264,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?w=1024"},"large":{"file":"rotor_blade_tips.jpg?resize=1024,819","width":1024,"height":819,"filesize":151264,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?w=1024"},"thumbnail-sm":{"file":"rotor_blade_tips.jpg?resize=50,50","width":50,"height":50,"filesize":151264,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?w=50&h=50&crop=1"},"thumbnail-md":{"file":"rotor_blade_tips.jpg?resize=100,100","width":100,"height":100,"filesize":151264,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?w=100&h=100&crop=1"},"thumbnail-lg":{"file":"rotor_blade_tips.jpg?resize=200,200","width":200,"height":200,"filesize":151264,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?w=200&h=200&crop=1"},"card-xsm":{"file":"rotor_blade_tips.jpg?resize=400,320","width":400,"height":320,"filesize":151264,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?w=400"},"card-sm":{"file":"rotor_blade_tips.jpg?resize=600,480","width":600,"height":480,"filesize":151264,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?w=600"},"card-md":{"file":"rotor_blade_tips.jpg?resize=900,720","width":900,"height":720,"filesize":151264,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg?w=900"},"full":{"file":"rotor_blade_tips.jpg","width":1024,"height":819,"mime_type":"image\/jpeg","source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg"}},"image_meta":{"aperture":"0","credit":"NASA Glenn Research Center","camera":"","caption":"Title: W-8 Fan Acoustic Casing Treatment Test on the Source Diagnostic Test Rotor Alone Hardware\rProgram: Advanced Air Vehicles Program (AAVP)\rProject: Advanced Air Transport Technology (AATT)\rSub-project: Aircraft Noise Reduction (ANR)\r\u00a0\rWeekly Highlight:\r\u00b7\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Acoustic Casing Treatment Testing Completed in the W-8 Single Stage Axial Compressor Facility: Testing of Acoustic Casing Treatments on the Source Diagnostic Test (SDT) rotor alone hardware which had begun in early January was completed on Thursday, February 16th. Four different over-the-rotor acoustic casing treatment concepts were tested along with two baseline configurations. Testing included steady-aerodynamic measurements of fan performance, hotfilm turbulence measurements, and inlet acoustic measurements with an in-duct array. These measurements will be used to assess the aerodynamic and acoustic impact of fan acoustic casing treatments on a high bypass ratio fan at TRL 3. This test was the last of 3 planned tests of potential over-the-rotor acoustic casing treatments. The first treatment test was completed in the Normal Incidence Tube (NIT) at Langley Research Center (LaRC) in Fall 2015 and the second was completed on the Advanced Noise Control Fan (ANCF) in the Aero-Acoustic Propulsion Laboratory (AAPL) in Winter 2016. This work is supported by the Aircraft Noise Reduction (ANR) subproject of the Advanced Air Transport Technology (AATT) Project. (POC: LTV\/ Rick Bozak 3-5160)","created_timestamp":"1487758842","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"Accoustic Casing Treatment Test","orientation":"0","keywords":["W-8","Fan Acoustic Casing Treatment Test","Rotor","Advanced Air Vehicles Program","AAVP","Advanced Air Transport Technology","AATT","Aeronautics"]},"credits":"NASA \/ Marvin Smith (Alcyon Technical Services)","original_date":{"stamp":0,"display":""}},"post":null,"source_url":"https:\/\/www.nasa.gov\/wp-content\/uploads\/2023\/03\/rotor_blade_tips.jpg","_links":{"self":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/media\/230019"}],"collection":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/media"}],"about":[{"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/types\/attachment"}],"author":[{"embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/users\/9"}],"wp:term":[{"taxonomy":"media-tags","embeddable":true,"href":"https:\/\/www.nasa.gov\/wp-json\/wp\/v2\/media-tags?post=230019"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}