Computation of aerodynamic noise radiated from ducted tail rotor using boundary element method
type: Item
instance of: scholarly article
title: Computation of aerodynamic noise radiated from ducted tail rotor using boundary element method
zbMATH Open document ID: 1426.76665
DOI: 10.1155/2017/5726253
author: Yunpeng Ma
author: Mingxu Yi
author: Lifeng Wang
author: Jun Huang
published in: Mathematical Problems in Engineering
publication date: 2018-11-05T00:00:00Z
review text: Summary: A detailed aerodynamic performance of a ducted tail rotor in hover has been numerically studied using CFD technique. The general governing equations of turbulent flow around ducted tail rotor are given and directly solved by using finite volume discretization and Runge-Kutta time integration. The calculations of the lift characteristics of the ducted tail rotor can be obtained. In order to predict the aerodynamic noise, a hybrid method combining computational aeroacoustic with boundary element method (BEM) has been proposed. The computational steps include the following: firstly, the unsteady flow around rotor is calculated using the CFD method to get the noise source information; secondly, the radiate sound pressure is calculated using the acoustic analogy Curle equation in the frequency domain; lastly, the scattering effect of the duct wall on the propagation of the sound wave is presented using an acoustic thin-body BEM. The aerodynamic results and the calculated sound pressure levels are compared with the known technique for validation. The sound pressure directivity and scattering effect are shown to demonstrate the validity and applicability of the method.
Mathematics Subject Classification ID: 76Q05
Mathematics Subject Classification ID: 76M15
zbMATH DE Number: 6972241
Wikidata QID: Q59147630
MaRDI profile type: Publication
full work available at URL: https://doi.org/10.1155/2017/5726253
OpenAlex ID: W2562422916
cites work: Numerical simulation of turbulent flow around helicopter ducted tail rotor
cites work: Sound generation by turbulence and surfaces in arbitrary motion
cites work: Q4004206
cites work: Boundary element acoustics. Fundamentals and computer codes. With 1 CD-ROM (Windows, Macintosh and Unix)
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description: scientific article; zbMATH DE number 6972241