{"id":"https://openalex.org/W2006444631","doi":"https://doi.org/10.1121/1.426406","title":"Active cancellation of rotor/stator interaction tones in turbofan engines","display_name":"Active cancellation of rotor/stator interaction tones in turbofan engines","publication_year":1999,"publication_date":"1999-02-01","ids":{"openalex":"https://openalex.org/W2006444631","doi":"https://doi.org/10.1121/1.426406","mag":"2006444631"},"language":"en","primary_location":{"id":"doi:10.1121/1.426406","doi":"https://doi.org/10.1121/1.426406","is_oa":false,"landing_page_url":"https://doi.org/10.1121/1.426406","pdf_url":null,"source":{"id":"https://openalex.org/S11296630","display_name":"The Journal of the Acoustical Society of America","issn_l":"0001-4966","issn":["0001-4966","1520-8524","1520-9024"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-class-a","anvur-scientific","ccf-b","cwts-core","dongbi-b","erih-plus","jufo-3","ki-jl-1","medline","norway-2","poland-100","russia-white-list-2","vabb-shw"],"host_organization":"https://openalex.org/P4310320226","host_organization_name":"Acoustical Society of America","host_organization_lineage":["https://openalex.org/P4310320226"],"host_organization_lineage_names":["Acoustical Society of America"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Journal of the Acoustical Society of America","raw_type":"journal-article"},"volume":null,"type":"conference-abstract","is_traditional":false,"indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":null,"display_name":"Bruce E. Walker","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Bruce E. Walker","raw_affiliation_strings":["Hersh Acoust. Eng., Inc., 780 Lakefield Rd., Unit G, Westlake Village, CA 91361, haebew@iswest.com"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Hersh Acoust. Eng., Inc., 780 Lakefield Rd., Unit G, Westlake Village, CA 91361, haebew@iswest.com","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5065646365","display_name":"Alan S. Hersh","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Alan S. Hersh","raw_affiliation_strings":["Hersh Acoust. Eng., Inc., 780 Lakefield Rd., Unit G, Westlake Village, CA 91361, haebew@iswest.com"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Hersh Acoust. Eng., Inc., 780 Lakefield Rd., Unit G, Westlake Village, CA 91361, haebew@iswest.com","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5113608488","display_name":"Lawrence J. Heidelberg","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I2799786008","display_name":"Glenn Research Center","ror":"https://ror.org/059fqnc42","country_code":"US","type":"facility","lineage":["https://openalex.org/I2799786008","https://openalex.org/I4210124779"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Lawrence J. Heidelberg","raw_affiliation_strings":["NASA Lewis Res. Ctr., Cleveland, OH"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NASA Lewis Res. Ctr., Cleveland, OH","institution_ids":["https://openalex.org/I2799786008"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5111670257","display_name":"Michael E. Spencer","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Michael E. Spencer","raw_affiliation_strings":["Signal Processing Solutions, Redondo Beach, CA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Signal Processing Solutions, Redondo Beach, CA","institution_ids":[]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":0,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":"105","issue":"2_Supplement","first_page":"1351","last_page":"1351"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11008","display_name":"Aerodynamics and Acoustics in Jet Flows","score":0.948199987411499,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11008","display_name":"Aerodynamics and Acoustics in Jet Flows","score":0.948199987411499,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10944","display_name":"Turbomachinery Performance and Optimization","score":0.022700000554323196,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11096","display_name":"Aeroelasticity and Vibration Control","score":0.00559999980032444,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/active-noise-control","display_name":"active noise control","score":0.9829999804496765},{"id":"https://openalex.org/keywords/turbofan-engine","display_name":"turbofan engine","score":0.7480000257492065},{"id":"https://openalex.org/keywords/dipole-sound-source","display_name":"dipole sound source","score":0.953000009059906},{"id":"https://openalex.org/keywords/axial-fan","display_name":"axial fan","score":0.5659999847412109}],"concepts":[{"id":"https://openalex.org/C110050840","wikidata":"https://www.wikidata.org/wiki/Q654051","display_name":"Turbofan","level":2,"score":0.9171391725540161},{"id":"https://openalex.org/C2776529397","wikidata":"https://www.wikidata.org/wiki/Q190312","display_name":"Stator","level":2,"score":0.7205516695976257},{"id":"https://openalex.org/C24890656","wikidata":"https://www.wikidata.org/wiki/Q82811","display_name":"Acoustics","level":1,"score":0.6948567628860474},{"id":"https://openalex.org/C2781212128","wikidata":"https://www.wikidata.org/wiki/Q2256181","display_name":"Duct (anatomy)","level":2,"score":0.6511982679367065},{"id":"https://openalex.org/C34329639","wikidata":"https://www.wikidata.org/wiki/Q27070220","display_name":"Nacelle","level":3,"score":0.6037085056304932},{"id":"https://openalex.org/C17281054","wikidata":"https://www.wikidata.org/wiki/Q193466","display_name":"Rotor (electric)","level":2,"score":0.5594599843025208},{"id":"https://openalex.org/C100342000","wikidata":"https://www.wikidata.org/wiki/Q583234","display_name":"Active noise control","level":3,"score":0.5106082558631897},{"id":"https://openalex.org/C2778263558","wikidata":"https://www.wikidata.org/wiki/Q46384","display_name":"Microphone","level":3,"score":0.492707759141922},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.46285074949264526},{"id":"https://openalex.org/C188414643","wikidata":"https://www.wikidata.org/wiki/Q3001183","display_name":"Harmonics","level":3,"score":0.45729386806488037},{"id":"https://openalex.org/C72203522","wikidata":"https://www.wikidata.org/wiki/Q6498398","display_name":"Mechanical fan","level":2,"score":0.437140554189682},{"id":"https://openalex.org/C99498987","wikidata":"https://www.wikidata.org/wiki/Q2210247","display_name":"Noise (video)","level":3,"score":0.43490609526634216},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.3118378818035126},{"id":"https://openalex.org/C146978453","wikidata":"https://www.wikidata.org/wiki/Q3798668","display_name":"Aerospace engineering","level":1,"score":0.2824980616569519},{"id":"https://openalex.org/C2778449969","wikidata":"https://www.wikidata.org/wiki/Q130760","display_name":"Turbine","level":2,"score":0.27192163467407227},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.24891433119773865},{"id":"https://openalex.org/C163294075","wikidata":"https://www.wikidata.org/wiki/Q581861","display_name":"Noise reduction","level":2,"score":0.19093579053878784},{"id":"https://openalex.org/C157138929","wikidata":"https://www.wikidata.org/wiki/Q570","display_name":"Loudspeaker","level":2,"score":0.12916791439056396},{"id":"https://openalex.org/C115961682","wikidata":"https://www.wikidata.org/wiki/Q860623","display_name":"Image (mathematics)","level":2,"score":0.0},{"id":"https://openalex.org/C165801399","wikidata":"https://www.wikidata.org/wiki/Q25428","display_name":"Voltage","level":2,"score":0.0},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.0},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C142724271","wikidata":"https://www.wikidata.org/wiki/Q7208","display_name":"Pathology","level":1,"score":0.0},{"id":"https://openalex.org/C97355855","wikidata":"https://www.wikidata.org/wiki/Q11473","display_name":"Thermodynamics","level":1,"score":0.0},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1121/1.426406","doi":"https://doi.org/10.1121/1.426406","is_oa":false,"landing_page_url":"https://doi.org/10.1121/1.426406","pdf_url":null,"source":{"id":"https://openalex.org/S11296630","display_name":"The Journal of the Acoustical Society of America","issn_l":"0001-4966","issn":["0001-4966","1520-8524","1520-9024"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-class-a","anvur-scientific","ccf-b","cwts-core","dongbi-b","erih-plus","jufo-3","ki-jl-1","medline","norway-2","poland-100","russia-white-list-2","vabb-shw"],"host_organization":"https://openalex.org/P4310320226","host_organization_name":"Acoustical Society of America","host_organization_lineage":["https://openalex.org/P4310320226"],"host_organization_lineage_names":["Acoustical Society of America"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Journal of the Acoustical Society of America","raw_type":"journal-article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W2009131353","https://openalex.org/W2019699935","https://openalex.org/W1979014257","https://openalex.org/W1988290089","https://openalex.org/W2056269062","https://openalex.org/W138279870","https://openalex.org/W7056129798","https://openalex.org/W2083387498","https://openalex.org/W1988527110","https://openalex.org/W2128234932"],"abstract_inverted_index":{"Rotor/stator-generated":[0],"aerodynamic":[1],"noise":[2,52],"in":[3,117,129],"turbofan":[4],"engines,":[5],"HVAC":[6],"axial":[7,151],"fans,":[8],"and":[9,28,69,101,106,121,146,154,157,177,185],"other":[10],"turbomachinery":[11],"is":[12,56],"often":[13,57],"dominated":[14],"by":[15,20],"blade":[16],"passage":[17],"harmonics":[18],"produced":[19],"dipole":[21,37],"sound":[22],"sources.":[23],"Radiation":[24],"toward":[25,182,188],"the":[26,32,36,41,45,66,72,104,118,160,183,189,194],"inlet":[27,119,184],"exhaust":[29,122,190],"depends":[30],"upon":[31],"effective":[33],"orientation":[34],"of":[35,44,49,60,63,65,71,86,93,103,108,174,179],"sources":[38],"relative":[39,67],"to":[40,136],"propagation":[42],"angles":[43],"excited":[46],"modes.":[47,74],"Absorption":[48],"this":[50],"tonal":[51],"using":[53],"passive":[54],"treatment":[55],"compromised":[58],"because":[59],"a":[61,149],"lack":[62],"knowledge":[64],"phases":[68],"amplitudes":[70],"propagating":[73],"A":[75],"modal-based":[76],"active":[77],"cancellation":[78],"system":[79],"has":[80],"been":[81],"developed":[82,145],"for":[83],"global":[84],"suppression":[85,173],"rotor/stator":[87],"interaction":[88],"tones.":[89],"Axially":[90],"spaced":[91],"annuli":[92],"controlled":[94],"wall-mounted":[95],"actuators":[96],"are":[97,115,127],"located":[98,116],"immediately":[99],"upstream":[100],"downstream":[102],"hubs":[105],"tips":[107],"stator":[109],"vanes.":[110],"Wall-mounted":[111],"error":[112],"microphone":[113],"arrays":[114],"nacelle":[120],"duct.":[123],"Actuator":[124],"drive":[125],"vectors":[126],"determined":[128],"an":[130],"adaptive-quadrature":[131],"control":[132],"algorithm":[133],"that":[134],"seeks":[135],"minimize":[137],"total":[138],"radiated":[139],"noise.":[140],"The":[141],"concept":[142],"was":[143,191],"initially":[144],"tested":[147],"on":[148,159],"24-in.":[150],"fan":[152],"facility":[153,166],"then":[155],"extended":[156],"demonstrated":[158],"48-in.":[161],"Active":[162],"Noise":[163],"Control":[164],"Fan":[165],"at":[167,193],"NASA":[168],"Lewis":[169],"Research":[170],"Center.":[171],"Simultaneous":[172],"modes":[175],"(4,0)":[176],"(4,1)":[178],"8\u201317":[180],"dB":[181,187],"3\u201311":[186],"achieved":[192],"second":[195],"blade-passage":[196],"harmonic.":[197]},"counts_by_year":[],"updated_date":"2026-09-29T14:09:16.559479","created_date":"2016-06-24T00:00:00"}