Near real-time simulation of rotorcraft acoustics and flight dynamics

Kenneth Steven Brentner, Leonard Lopes, Hsuan Nien Chen, Joseph Francis Horn

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

In this paper, a near-real-time rotorcraft flight dynamics-acoustics prediction system is presented. The high-fidelity PSU-WOPWOP rotor noise prediction code is coupled with the GENHEL flight simulation code, which provides low-fidelity blade loading and motion. This system is an initial step intended to investigate the feasibility of real-time rotorcraft noise prediction and to demonstrate the utility of such a system. Limited acoustic validation is shown for a contemporary-design four-bladed main rotor in level flight. A complex 80-s maneuver was used to demonstrate the potential of the coupled system. This realistic maneuver includes a climb, coordinated turn, and level flight conditions. The noise predictions show changes in main rotor noise radiation strength and directivity caused by maneuver transients, aircraft attitude changes, and the aircraft flight - but do not include the effect of blade-vortex-interaction noise. A comparison of the total noise with the thickness and loading noise components helps explain the noise directivity. The computations for a single observer were very fast, although the algorithm is not currently organized as a real-time computation.

Original languageEnglish (US)
Pages (from-to)347-355
Number of pages9
JournalJournal of Aircraft
Volume42
Issue number2
DOIs
StatePublished - Jan 1 2005

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Flight dynamics
Acoustics
Rotors
Aircraft
Vortex flow
Radiation

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

Cite this

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abstract = "In this paper, a near-real-time rotorcraft flight dynamics-acoustics prediction system is presented. The high-fidelity PSU-WOPWOP rotor noise prediction code is coupled with the GENHEL flight simulation code, which provides low-fidelity blade loading and motion. This system is an initial step intended to investigate the feasibility of real-time rotorcraft noise prediction and to demonstrate the utility of such a system. Limited acoustic validation is shown for a contemporary-design four-bladed main rotor in level flight. A complex 80-s maneuver was used to demonstrate the potential of the coupled system. This realistic maneuver includes a climb, coordinated turn, and level flight conditions. The noise predictions show changes in main rotor noise radiation strength and directivity caused by maneuver transients, aircraft attitude changes, and the aircraft flight - but do not include the effect of blade-vortex-interaction noise. A comparison of the total noise with the thickness and loading noise components helps explain the noise directivity. The computations for a single observer were very fast, although the algorithm is not currently organized as a real-time computation.",
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Near real-time simulation of rotorcraft acoustics and flight dynamics. / Brentner, Kenneth Steven; Lopes, Leonard; Chen, Hsuan Nien; Horn, Joseph Francis.

In: Journal of Aircraft, Vol. 42, No. 2, 01.01.2005, p. 347-355.

Research output: Contribution to journalArticle

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