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Toward noise abatement flight procedure design: DLR rotorcraft noise ground footprints model

Yin, Jianping and Buchholz, Heino (2007) Toward noise abatement flight procedure design: DLR rotorcraft noise ground footprints model. Journal of the American Helicopter Society, Volume 52,Issue 2, pp. 90-98. ISSN 0002-8711.

Full text not available from this repository.

Abstract

As a first step towards noise abatement flight procedure design, this paper presents techniques for rotorcraft noise ground footprint prediction developed at DLR, using either purely numerical computations or measured sound fields. When based on purely numerical computations or first-principles, a combination of 3D free wake unsteady panel method and a Ffowcs Williams-Hawkings (FW-H) method is used to provide noise source characteristics on a hemisphere. The noise ground footprints for a BO105 helicopter at 6° descent flight is simulated and compared with flight test data. The noise sources considered are only from a main rotor and tail rotor. When based on measured sound fields from the flight test, a depropagation procedure is used to define the noise source characteristics on the hemisphere. The verification of the depropagation procedure using purely numerical computations is introduced. Two hypothetic noise abatement procedures are simulated based on the RONAP test data.

Document Type:Article
Title:Toward noise abatement flight procedure design: DLR rotorcraft noise ground footprints model
Authors:
AuthorsInstitution or Email of Authors
Yin, JianpingUNSPECIFIED
Buchholz, HeinoUNSPECIFIED
Date:April 2007
Journal or Publication Title:Journal of the American Helicopter Society
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:Volume 52,Issue 2
Page Range:pp. 90-98
ISSN:0002-8711
Status:Published
Keywords:Helicopter Noise, noise abatement procedures,noise ground footprint
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Rotorcraft
DLR - Research area:Aeronautics
DLR - Program:L RR - Rotorcraft Research
DLR - Research theme (Project):L - The Quiet and Comfortable Rotorcraft
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Dr.-Ing. Jianping Yin
Deposited On:23 Jul 2007
Last Modified:27 Apr 2009 14:05

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