Experimental/numerical acoustic correlation of helicopter unsteady MANOEUVRES

Conference paper (2016)

Authors

Massimo Gennaretti University of Roma Tre
Giovanni Bernardini University of Roma Tre
S. Hartjes Air Transport & Operations - Aerospace Engineering
Alessandro Scandroglio Leonardo Helicopters
Luca Riviello Leonardo Helicopters
Enrico Paolone Leonardo Helicopters
Research Group
Air Transport & Operations (Aerospace Engineering) (TU Delft)
Copyright: © 2016 Massimo Gennaretti, Giovanni Bernardini, S. Hartjes, Alessandro Scandroglio, Luca Riviello, Enrico Paolone
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Published Date

2016

Language

English

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Faculty

Aerospace Engineering

Department

Control & Operations

Research Group

Air Transport & Operations

Abstract

This paper presents one of the main objective of WP1 of Clean Sky GRC5 MANOEUVRES project, which consists in the correlation of ground noise data measured during flight tests, with numerical predictions obtained by a numerical process aimed at the analysis of the acoustic field emitted by helicopter rotors in arbitrary unsteady manoeuvring flight. Two of the helicopter trajectories analysed by the dedicated GRC5 flight test campaign are considered. Noise measurements obtained by microphones located on the ground at several positions along and aside the ground projection of the vehicle fly-over trajectory are used for correlation. The numerical simulation starts with the aeromechanic identification of the flown trajectory, followed by the corresponding prediction of aerodynamic loads, rotor noise radiation and far field atmospheric propagation.