BibTex format
@inproceedings{Yeddula:2021,
author = {Yeddula, SR and Morgans, AS},
title = {The two-dimensional acoustic field in an annular duct with axially varying area, sustaining an isentropic mean flow},
year = {2021}
}
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RIS format (EndNote, RefMan)
TY - CPAPER
AB - This paper develops an analytical solution for the two-dimensional (both axial and azimuthal variations of the perturbed flow) acoustic field in an annular duct whose cross-sectional area varies axially. The duct sustains an isentropic axial and azimuthal mean flow. For the first time, the effects of axial variations in both the mean radius and the width of the annular duct are accounted for. The mean flow is numerically resolved from the conservation equations for a perfect, inviscid gas in both the meridional and azimuthal directions of the annular duct. Mean flow variations in the radial direction are neglected. For linear flow perturbations in the axial and azimuthal directions, the linearized Euler equations are recast into a first-order system of differential equations and solved using the Magnus expansion. The analytical predictions are validated against numerical simulations of the linearized Euler equations. The model can capture the acoustic field accurately at low frequencies, at both low and high flow Mach numbers, even when the Magnus expansion is truncated to a limited number of terms.
AU - Yeddula,SR
AU - Morgans,AS
PY - 2021///
SN - 2329-3675
TI - The two-dimensional acoustic field in an annular duct with axially varying area, sustaining an isentropic mean flow
ER -