A semi-empirical noise modeling method for helicopter maneuvering flight operations

Eric Greenwood, Fredric H. Schmitz, Richard D. Sickenberger

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

9 Scopus citations

Abstract

A new model for Blade-Vortex Interaction noise generation during maneuvering flight is developed in this paper. Acoustic and performance data from both flight and wind tunnels are used to derive a non-dimensional and analytical performance/acoustic model that describes BVI noise in steady flight. The model is extended to transient maneuvering flight (pure pitch and roll transients) by using quasi-steady assumptions throughout the prescribed maneuvers. Ground noise measurements, taken during maneuvering flight of a Bell 206B helicopter, show that many of the noise radiation details are captured. The result is a computationally efficient Blade-Vortex Interaction noise model with sufficient accuracy to account for transient maneuvering flight. The code can be run in real time to predict transient maneuver noise and is suitable for use in an acoustic mission-planning tool.

Original languageEnglish (US)
Title of host publication68th American Helicopter Society International Annual Forum 2012
Pages55-72
Number of pages18
StatePublished - Aug 16 2012
Event68th American Helicopter Society International Annual Forum 2012 - Fort Worth, TX, United States
Duration: May 1 2012May 3 2012

Publication series

NameAnnual Forum Proceedings - AHS International
Volume1
ISSN (Print)1552-2938

Other

Other68th American Helicopter Society International Annual Forum 2012
CountryUnited States
CityFort Worth, TX
Period5/1/125/3/12

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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