Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Acoustic resonances in open and closed 3D cavities
Year:2013
Research Areas
  • Mechanical engineering,
  • Aeroacustics and vibrations
Information
Abstract
Airframe noise is a significant component of the total noise radiated by an aircraft on approach. Although these tones are generated as the result of a complex interaction between the turbulent air flow and the cavity, it is expected that the acoustic resonances of the cavity approach the noise tones at low Mach numbers. Moreover, an accurate design of noise control systems of these cavity tones can be facilitated through an advanced knowledge of the acoustic resonances of the open cavity. The present work presents a computational method to predict the acoustic resonances of a 3D open cavity. A multi-dimensional Helmholtz equation closed with appropriate Perfectly Matched Layer absorbing boundary conditions is solved. Results of the method in the presented three dimensional cavity configuration are shown, the results of which have been compared with experimental measurements in a three-dimensional (cubic) open cavity. Moreover, the noise generated by an electric machine inside of a wind turbine is also studied as direct application of the numerical methodology dealing with very complex geometries.
International
Si
Congress
Conference on Instability and Control of Massively Separated Flows (ICOMASELF 2013)
960
Place
Prato (Italia)
Reviewers
Si
ISBN/ISSN
0926-5112
Start Date
04/09/2013
End Date
06/09/2013
From page
1
To page
6
Proceedings of the International Conference on Instability and Control of Massively Separated Flows
Participants
  • Autor: Leo Miguel Gonzalez Gutierrez (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: CEHINAV (Canal de Ensayos Hidrodinámicos de la E.T.S.I. Navales)
  • Departamento: Ciencias Aplicadas a la Ingeniería Naval
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)