Full-scale rotorcraft broadband noise prediction and its relevance to civil noise certification criteria

Royce Snider, Timothy Samuels, Benjamin Goldman, Kenneth Steven Brentner

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations

Abstract

Rotorcraft broadband noise prediction and its relevance to civil noise certification criteria are demonstrated for a full-scale helicopter. It is shown that prediction of the effective perceived noise level (EPNL) during steady level flight can be significantly improved by incorporating rotor broadband noise mechanisms in combination with main and tail rotor discrete frequency noise sources. EPNL is significantly under-predicted if rotor broadband noise mechanisms and/or tail rotor noise sources are ignored. EPNL for future rotorcraft can be improved if design efforts concentrate on the rotor design parameters (in order of priority) that effect: 1) Tail rotor discrete frequency noise, 2) Main rotor broadband noise, and 3) Main rotor discrete frequency noise. Copyright

Original languageEnglish (US)
Title of host publication69th American Helicopter Society International Annual Forum 2013
Pages1293-1307
Number of pages15
Volume2
StatePublished - 2013
Event69th American Helicopter Society International Annual Forum 2013 -
Duration: May 21 2013May 23 2013

Other

Other69th American Helicopter Society International Annual Forum 2013
Period5/21/135/23/13

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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