Simulations of whistling and the whistling potentiality of an in-duct orifice with linear aeroacoustics
2012 (English)In: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568, Vol. 331, no 5, 1084-1096 p.Article in journal (Refereed) Published
This paper demonstrates a linear aeroacoustic simulation methodology to predict the whistling of an orifice plate in a flow duct. The methodology is based on a linearized Navier-Stokes solver in the frequency domain with the mean flow field taken from a Reynolds-Averaged Navier-Stokes (RANS) solution. The whistling potentiality is investigated via an acoustic energy balance for the in-duct element and good agreement with experimental data is shown. A Nyquist stability criterion based on the simulation data was applied to predict whistling of the orifice when placed in a finite sized duct and experiments were carried out to validate the predictions. The results indicate that although whistling is a non-linear phenomena caused by an acoustic-flow instability feed-back loop, the linearized Navier-Stokes equations can be used to predict both whistling potentiality and a duct system’s ability to whistle or not.
Place, publisher, year, edition, pages
Elsevier, 2012. Vol. 331, no 5, 1084-1096 p.
aeroacoustics, frequency-domain, linearized Navier-Stokes, scattering, duct
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-33779DOI: 10.1016/j.jsv.2011.10.028ISI: 000299459100009ScopusID: 2-s2.0-82955233114OAI: oai:DiVA.org:kth-33779DiVA: diva2:417520
FunderTrenOp, Transport Research Environment with Novel PerspectivesSwedish e‐Science Research Center
QC 201203092011-05-172011-05-172013-04-22Bibliographically approved