A study of the aerodynamics and acoustics of super-BVI

Hsuan Nien Chen, Kenneth Steven Brentner, Justin S. Shirey, Joseph Francis Horn, Shreyas Ananthan, J. Gordon Leishman

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

5 Citations (Scopus)

Abstract

Super-BVI was previously predicted during an aggressive right-turn maneuver. During this maneuver a substantial increase in noise was observed around the helicopter. This noise increase was found to be caused by the parallel interaction of a bundle of tip vortices with the rotor blades. Although this maneuver is aggressive in nature and somewhat uncommon during normal helicopter operation, it highlights the potential of tip-vortex bundling and the possibilities of creating substantial noise in certain flight maneuvers. Understanding this potential noise source could prove important in future helicopter quieting research. Based on this premise, further research into the conditions that cause super-BVI and its effects on rotor noise has been undertaken. It is concluded that the helicopter roll motion was the major contributor to super-BVI formation. To investigate the potential of the bundled tip vortices as a noise source in general helicopter operations, a roll oscillation maneuver is also discussed.

Original languageEnglish (US)
Title of host publicationAHS Internaitonal 62nd Annual Forum - Vertical Flight
Subtitle of host publicationLeading through Innovation - Proceedings
Pages797-811
Number of pages15
StatePublished - Dec 1 2006
Event62nd American Helicopter Society International Annual Forum 2006 - Phoenix, AZ, United States
Duration: May 9 2006May 11 2006

Publication series

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

Other

Other62nd American Helicopter Society International Annual Forum 2006
CountryUnited States
CityPhoenix, AZ
Period5/9/065/11/06

Fingerprint

Helicopters
Aerodynamics
Acoustics
Vortex flow
Rotors
Turbomachine blades

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Chen, H. N., Brentner, K. S., Shirey, J. S., Horn, J. F., Ananthan, S., & Leishman, J. G. (2006). A study of the aerodynamics and acoustics of super-BVI. In AHS Internaitonal 62nd Annual Forum - Vertical Flight: Leading through Innovation - Proceedings (pp. 797-811). (Annual Forum Proceedings - AHS International; Vol. II).
Chen, Hsuan Nien ; Brentner, Kenneth Steven ; Shirey, Justin S. ; Horn, Joseph Francis ; Ananthan, Shreyas ; Leishman, J. Gordon. / A study of the aerodynamics and acoustics of super-BVI. AHS Internaitonal 62nd Annual Forum - Vertical Flight: Leading through Innovation - Proceedings. 2006. pp. 797-811 (Annual Forum Proceedings - AHS International).
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abstract = "Super-BVI was previously predicted during an aggressive right-turn maneuver. During this maneuver a substantial increase in noise was observed around the helicopter. This noise increase was found to be caused by the parallel interaction of a bundle of tip vortices with the rotor blades. Although this maneuver is aggressive in nature and somewhat uncommon during normal helicopter operation, it highlights the potential of tip-vortex bundling and the possibilities of creating substantial noise in certain flight maneuvers. Understanding this potential noise source could prove important in future helicopter quieting research. Based on this premise, further research into the conditions that cause super-BVI and its effects on rotor noise has been undertaken. It is concluded that the helicopter roll motion was the major contributor to super-BVI formation. To investigate the potential of the bundled tip vortices as a noise source in general helicopter operations, a roll oscillation maneuver is also discussed.",
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Chen, HN, Brentner, KS, Shirey, JS, Horn, JF, Ananthan, S & Leishman, JG 2006, A study of the aerodynamics and acoustics of super-BVI. in AHS Internaitonal 62nd Annual Forum - Vertical Flight: Leading through Innovation - Proceedings. Annual Forum Proceedings - AHS International, vol. II, pp. 797-811, 62nd American Helicopter Society International Annual Forum 2006, Phoenix, AZ, United States, 5/9/06.

A study of the aerodynamics and acoustics of super-BVI. / Chen, Hsuan Nien; Brentner, Kenneth Steven; Shirey, Justin S.; Horn, Joseph Francis; Ananthan, Shreyas; Leishman, J. Gordon.

AHS Internaitonal 62nd Annual Forum - Vertical Flight: Leading through Innovation - Proceedings. 2006. p. 797-811 (Annual Forum Proceedings - AHS International; Vol. II).

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

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Chen HN, Brentner KS, Shirey JS, Horn JF, Ananthan S, Leishman JG. A study of the aerodynamics and acoustics of super-BVI. In AHS Internaitonal 62nd Annual Forum - Vertical Flight: Leading through Innovation - Proceedings. 2006. p. 797-811. (Annual Forum Proceedings - AHS International).