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A low frequency model for the aeroacoustic scattering of cylindrical tube rows in cross-flow

Publication available at: http://arxiv.org/abs/2202.11538
Title: A low frequency model for the aeroacoustic scattering of cylindrical tube rows in cross-flow
Authors: Surendran, A
Na, W
Boakes, C
Yang, D
Morgans, A
Boij, S
Item Type: Journal Article
Abstract: Heat exchanger tube rows can influence the thermoacoustic instability behaviour of combustion systems since they act as both acoustic scatterers and unsteady heat sinks. Therefore, with careful tuning of their thermoacoustic properties, heat exchangers have the potential to act as passive control devices. In this work, we focus on (only) the acoustic scattering behaviour of heat exchanger tubes. We present a comparison of existing acoustic models for tube rows and slits, models for the latter having the advantage of incorporating frequency dependence. We then propose a new model that enables the adaptation of slit models for tube rows. This model is validated against experiments and Linearised Navier–Stokes Equations (LNSE) predictions for the transmission and reflection coefficients, including phase information. The model predictions show very good agreement with the experimental and numerical validations, especially for low frequencies (Strouhal number , based on tube radius and excitation frequency), with mean differences less than 2% for the transmission coefficients (the reflection coefficient errors are somewhat larger since their magnitudes are very close to zero).
Issue Date: Feb-2022
Date of Acceptance: 26-Jan-2022
URI: http://hdl.handle.net/10044/1/95370
DOI: 10.1016/j.jsv.2022.116806
ISSN: 0022-460X
Publisher: Elsevier BV
Start Page: 116806
End Page: 116806
Journal / Book Title: Journal of Sound and Vibration
Volume: 527
Copyright Statement: © 2022 Elsevier Ltd. All rights reserved.
Sponsor/Funder: Commission of the European Communities
Funder's Grant Number: 772080
Keywords: physics.flu-dyn
physics.flu-dyn
Acoustics
02 Physical Sciences
09 Engineering
Publication Status: Published
Open Access location: http://arxiv.org/abs/2202.11538
Article Number: 116806
Online Publication Date: 2022-02-18
Appears in Collections:Mechanical Engineering