An investigation of transient rotor noise in maneuvering flight

Hsuan Nien Chen, Kenneth S. Brentner, Justin S. Shirey

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

4 Scopus citations

Abstract

This paper contains a study of helicopter rotor noise generated during maneuvering flight. In particular, the study focuses on the significance of noise generated during the transient states of a maneuver. Two elementary maneuvers, acceleration and a right turn-entry maneuver, are presented and analyzed. These maneuvers demonstrate that transient maneuver noise can be a dominant source of rotor noise. The acoustic impact of Blade-Vortex Interaction (BVI) and its role in the generation of transient maneuver noise is also analyzed in the right turn-entry maneuver. This study investigates the sources of transient maneuver noise by analyzing the acoustic effects of helicopter dynamic and aerodynamic response during transient maneuvering flight. By introducing a series of fictitious test cases, the sources of transient maneuver noise can be identified and the resulting change in acoustic signature is characterized by isolating the mechanisms believed to be responsible for generating the extra noise. It is found that the unsteady characteristics of rotor aerodynamics and dynamic response play a major role in generating transient maneuver noise.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference
Pages1306-1319
Number of pages14
StatePublished - Dec 29 2005
EventCollection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference - Monterey, CA, United States
Duration: Mar 23 2005Mar 25 2005

Publication series

NameCollection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference
Volume2

Other

OtherCollection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference
CountryUnited States
CityMonterey, CA
Period3/23/053/25/05

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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  • Cite this

    Chen, H. N., Brentner, K. S., & Shirey, J. S. (2005). An investigation of transient rotor noise in maneuvering flight. In Collection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference (pp. 1306-1319). (Collection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference; Vol. 2).