The acoustic analogy and the prediction of the noise of rotating blades
type: Item
instance of: scholarly article
title: The acoustic analogy and the prediction of the noise of rotating blades
zbMATH Open document ID: 0911.76082
author: F. Farassat
author: Kenneth S. Brentner
published in: Theoretical and Computational Fluid Dynamics
publication date: 1998-07-14T00:00:00Z
review text: The paper focuses on the prediction of the noise of rotating machinery. The governing Ffowcs Williams-Hawkings (FW-H) equation for this problem is a wave equation for perturbation density with three source terms, which are known as thickness, loading, and the quadrupole source terms. We present some mathematical results for noise prediction based on the FW-H equation, including examples for helicopter rotors. In particular, we discuss the prediction of blade-vortex interaction noise and high-speed impulsive noise of helicopter rotors. For high-speed propellers, we briefly discuss the derivation of a singularity-free solution of the FW-H equation for a supersonic panel on a blade.
Mathematics Subject Classification ID: 76Q05
Mathematics Subject Classification ID: 76U05
zbMATH DE Number: 1174730
zbMATH Keywords: Ffowcs Williams-Hawkings equation
zbMATH Keywords: perturbation density
zbMATH Keywords: source terms
zbMATH Keywords: helicopter rotors
zbMATH Keywords: blade-vortex interaction noise
zbMATH Keywords: high-speed impulsive noise
zbMATH Keywords: high-speed propellers
zbMATH Keywords: singularity-free solution
zbMATH Keywords: supersonic panel
MaRDI profile type: Publication
full work available at URL: s001620050056
OpenAlex ID: W1964161779
DOI: 10.1007/S001620050056
description: scientific article; zbMATH DE number 1174730