Prediction of Near-And Far-Field Noise Generated by Contra-Rotating Open Rotors-Reference-Cited by-同舟云学术

Prediction of Near-And Far-Field Noise Generated by Contra-Rotating Open Rotors

Published:2012-06 Issue:2 Volume:11 Page:177-196
ISSN:1475-472X
Container-title:International Journal of Aeroacoustics
language:en
Short-container-title:International Journal of Aeroacoustics

Author:

Deconinck Thomas¹,Capron Alexandre¹,Hirsch Charles¹,Ghorbaniasl Ghader²

Affiliation:

1. Numeca International, Brussels, Belgium

2. Vrije Universiteit Brussel, Brussels, Belgium

Abstract

An innovative aeroacoustic prediction method for Contra-Rotating Open Rotors (CROR) based on the nonlinear harmonic method (NLH) for the CFD computations and on the Ffowcs Williams and Hawkings (FW-H) equations for the far-field acoustic propagation is described. This method is tested on a generic 8 × 8 puller CROR at typical take-off conditions. The outstanding efficiency of the prediction method in terms of CPU cost is demonstrated in this study. An analysis of the aerodynamic interactions between the two rotors as well as of the aeroacoustic field radiated in the far-field is presented, allowing for an improved understanding of noise generation mechanisms.

Publisher

SAGE Publications

Subject

Acoustics and Ultrasonics,Aerospace Engineering

Link

http://journals.sagepub.com/doi/pdf/10.1260/1475-472X.11.2.177

Reference16 articles.

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2. A NEW BOUNDARY INTEGRAL FORMULATION FOR THE PREDICTION OF SOUND RADIATION

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4. Sound generation by turbulence and surfaces in arbitrary motion

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