Simulations of acoustic wave propagation in an impedance tube using a frequency-domain linearized navier-stokes methodology
2014 (English)In: 20th AIAA/CEAS Aeroacoustics Conference, American Institute of Aeronautics and Astronautics, 2014Conference paper (Refereed)
In this paper, we present analysis of the propagation of acoustic plane waves in an impedance tube, in which a liner is attached at one end of the duct. The purpose is to evaluate a linearized Navier-Stokes solver as a tool to determine the acoustic performance of the liner. The liner considered consists of a perforated plate with several circular holes and a rectangular back cavity. The inuence of parameter variations such as plate thickness, porosity area examined. The prediction of the acoustic characters of the liner is based on the numerical solutions of the linearized Navier-Stokes equations in frequency domain in three space dimensions. The impedance as well as reection coefficients of the liner for frequencies in the plane wave regime are obtained by two-microphone method data, which are compared to experimental data as well as results from a semi-empirical model. The results presented in this paper agree very well with results of the linear semi-empirical model, while there are some discrepancies to the experimental results. The reasons for these discrepancies are not fully understood, but could partly be due to that a linear assumption is not always valid.
Place, publisher, year, edition, pages
American Institute of Aeronautics and Astronautics, 2014.
Acoustic measuring instruments, Aeroacoustics, Elastic waves, Frequency domain analysis, Linearization, Navier Stokes equations, Perforated plates, Tubes (components), Wave propagation, Acoustic characters, Acoustic performance, Acoustic plane waves, Linearized Navier-Stokes, Linearized navier-stokes equations, Semi-empirical modeling, Three space dimensions, Two-microphone methods
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-168123ScopusID: 2-s2.0-84903885187ISBN: 978-162410285-1OAI: oai:DiVA.org:kth-168123DiVA: diva2:815708
20th AIAA/CEAS Aeroacoustics Conference 2014, Atlanta, GA, United States, 16 June 2014 through 20 June 2014
QC 201506012015-06-012015-05-272016-10-07Bibliographically approved