Generation and scattering of acoustic modes in ductswith flow
2014 (English)In: 20th AIAA/CEAS Aeroacoustics Conference, American Institute of Aeronautics and Astronautics, 2014Conference paper (Refereed)
The generation and scattering behaviour of fluid machines such as pumps or fans in con-nected duct or pipe systems is of great interest to minimize disturbing and harmful soundemission, for instance of air conditioning systems. One approach to describe the sound-fieldcreated by a fluid machine or in a duct component is to apply a linear multi-port modelthat includes direction-depending transmission and reflection coefficients for the presentwave-modes and the sound generation. Once this characteristic data are determined, thesound-field can be calculated for arbitrary acoustic loads. This paper describes an approachto measure the scattering of the first 8 modes in a duct system with flow, using externalloudspeakers as sound sources.
Place, publisher, year, edition, pages
American Institute of Aeronautics and Astronautics, 2014.
multi-port, acoustic, aiaa, air-conditioner
Research subject Vehicle and Maritime Engineering
IdentifiersURN: urn:nbn:se:kth:diva-160820DOI: 10.2514/6.2014-3115ScopusID: 2-s2.0-84903878849OAI: oai:DiVA.org:kth-160820DiVA: diva2:791256
20th AIAA/CEAS Aeroacoustics Conference, AIAA Aviation, 16-20 June 2014, Atlanta, GA
FunderEU, FP7, Seventh Framework Programme
Qc 201503022015-02-272015-02-272015-03-02Bibliographically approved