Adapting a slit model to determine the aeroacoustic response of tube rows
Paper in proceeding, 2022

Cylindrical tubes in cross-flow, like the ones found in heat exchangers, are excellent acoustic dampers and as such have the potential to mitigate thermoacoustic instabilities. Flow separation and vortex shedding downstream of the tube row are key to significantly enhancing sound attenuation. However, constructing an analytical solution for the aeroacoustic response of tube rows in cross-flow is very challenging owing to the complex flow structure, vortex shedding and coupling with acoustics. To overcome this, we propose the adaptation of a slit model for tube row acoustic scattering (aeroacoustic response) predictions at low Strouhal numbers. The slit model was modified such that the loss coefficients across the slit and the tube row matches. The model is then validated against numerical predictions using Linearised Navier Stokes Equations and experimental measurements. The predictions for both magnitude and phase for transmission and reflection coefficients agree well with the simulations and experiments.


Aswathy Surendran

Technical University of Munich

Keele University

Wei Na

Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics

Charles Boakes

Imperial College London

Dong Yang

Southern University of Science and Technology

Aimee S. Morgans

Imperial College London

Susann Boij

Royal Institute of Technology (KTH)

Internoise 2022 - 51st International Congress and Exposition on Noise Control Engineering

9781906913427 (ISBN)

51st International Congress and Exposition on Noise Control Engineering, Internoise 2022
Glasgow, United Kingdom,

Subject Categories

Applied Mechanics

Other Physics Topics

Fluid Mechanics and Acoustics

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