A parameter identification method for helicopter noise source identification and physics-based semi-empirical modeling

Eric Greenwood, Fredric H. Schmitz

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

A new physics-based parameter identification method for rotor harmonic noise sources is developed using an acoustic inverse simulation technique. This new method allows for the identification of individual rotor harmonic noise sources and allows them to be characterized in terms of their individual non-dimensional governing parameters. This new method is applied to both wind tunnel measurements and ground noise measurements of two-bladed rotors. The method is shown to match the parametric trends of main rotor Blade-Vortex Interaction (BVI) noise, allowing accurate estimates of BVI noise to be made for operating conditions based on a small number of measurements taken at different operating conditions.

Original languageEnglish (US)
Pages (from-to)2715-2730
Number of pages16
JournalAnnual Forum Proceedings - AHS International
Volume4
StatePublished - Nov 15 2010
Event66th Forum of the American Helicopter Society: "Rising to New Heights in Vertical Lift Technology", AHS Forum 66 - Phoenix, AZ, United States
Duration: May 11 2010May 13 2010

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Helicopters
Identification (control systems)
Physics
Rotors
Vortex flow
Acoustic noise
Turbomachine blades
Wind tunnels
Acoustics

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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A parameter identification method for helicopter noise source identification and physics-based semi-empirical modeling. / Greenwood, Eric; Schmitz, Fredric H.

In: Annual Forum Proceedings - AHS International, Vol. 4, 15.11.2010, p. 2715-2730.

Research output: Contribution to journalConference article

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AU - Schmitz, Fredric H.

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