Aeroacoustics and Advanced Noise Control

A special issue of Vibration (ISSN 2571-631X).

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 3062

Special Issue Editors

Department of Mechanical and Manufacturing Engineering, Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, Oshawa, ON L1G 0C5, Canada
Interests: aeroacoustics; flow-sound interaction; flow-induced vibrations; noise and vibration control; noise, vibration and harshness (NVH)
Mechanical Engineering, School of Engineering, University of Guelph, Guelph, ON N1G 2W1, Canada
Interests: fluid–structure interaction; finite element analysis; design; tube arrays; reliability of power plants

Special Issue Information

Dear Colleagues,

It is our pleasure to introduce the following special issue on Aeroacoustics and Advanced Noise Control. We look forward to receiving your valuable contribution to this special issue.

Separated shear flows and wakes behind bluff bodies generate pressure perturbations with frequencies that vary linearly with the flow velocity. Under certain conditions, these pressure perturbations can be amplified, and they often result in acute noise levels and/or excessive vibrations. It is sometimes very challenging to predict the conditions under which such a scenario occurs and, therefore, it becomes imperative to develop active and passive techniques for noise control.

This Special Issue is dedicated to covering all aspects related to aeroacoustics in various flow configurations, with emphasis on the advanced techniques that can be used to alleviate their undesirable effects. The following topics are just some of the examples that will be covered:

  • Experimental aeroacoustics
  • Computational aeroacoustics
  • Flow-excited acoustic resonance
  • Fluid–structure interaction
  • Howe’s analogy for aerodynamic sound
  • Flow control
  • Wake structures over bluff bodies
  • Acoustic damping devices
  • Vortex dynamics
  • Flow over cavities and side branches
  • Flanking noise
  • Acoustics of pumps and compressors

Prof. Dr. Atef Mohany
Prof. Dr. Marwan Hassan
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Vibration is an international peer-reviewed open access quarterly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • aeroacoustics
  • bluff bodies
  • vortex dynamics
  • shear flow
  • fluid–structure interaction
  • noise control
  • active flow control

Published Papers (2 papers)

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Research

15 pages, 1354 KiB  
Article
Uncertainty Propagation and Global Sensitivity Analysis of a Surface Acoustic Wave Gas Sensor Using Finite Elements and Sparse Polynomial Chaos Expansions
by Mohamed Hamdaoui
Vibration 2023, 6(3), 610-624; https://doi.org/10.3390/vibration6030038 - 01 Aug 2023
Viewed by 1003
Abstract
The aim of this work is to perform an uncertainty propagation and global sensitivity analysis of a surface acoustic wave (SAW) gas sensor using finite elements and sparse polynomial chaos. The SAW gas sensor is modeled using finite elements (FEM) under COMSOL, and [...] Read more.
The aim of this work is to perform an uncertainty propagation and global sensitivity analysis of a surface acoustic wave (SAW) gas sensor using finite elements and sparse polynomial chaos. The SAW gas sensor is modeled using finite elements (FEM) under COMSOL, and the sensitivity to DCM of its Sezawa mode is considered to be the quantity of interest. The importance of several geometrical (width and PIB thickness), material (PIB Young’s modulus and density), and ambient (pressure, temperature, and concentration) parameters on the sensor’s sensitivity is figured out by means of Sobol’ indices using sparse polynomial chaos expansions. It is shown that when the variability of the input parameters is low (inferior to 5%), the only impacting parameter is the cell width. However, when the variability of the input parameters reaches medium levels (around 10%), all the input parameters except the ambient temperature are impacting the sensor’s sensitivity. It is also reported that in the medium variability case, the sensor’s sensitivity experiences high variations that can lead to a degradation of its performances. Full article
(This article belongs to the Special Issue Aeroacoustics and Advanced Noise Control)
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22 pages, 19861 KiB  
Article
Experimental Analysis of the Space Ratio Influence on the Excitation Frequencies of One and Two Cylinders Free to Vibrate in Tandem Arrangement
by Roberta Fátima Neumeister, Adriane Prisco Petry and Sergio Viçosa Möller
Vibration 2022, 5(4), 770-791; https://doi.org/10.3390/vibration5040045 - 07 Nov 2022
Cited by 1 | Viewed by 1297
Abstract
The present study aims to investigate the dominant frequency ranges of a cylinder free to vibrate transversally to the flow positioned in the first, the second or in both positions of the tandem assembly for L/D = 1.26, 1.4, 1.6, and 3.52 with [...] Read more.
The present study aims to investigate the dominant frequency ranges of a cylinder free to vibrate transversally to the flow positioned in the first, the second or in both positions of the tandem assembly for L/D = 1.26, 1.4, 1.6, and 3.52 with the increase in the flow velocity. Accelerometers and hot wire anemometers were the experimental tools applied in this study. The range of study encompassed the reduced velocity with values from 6 to 72 and Reynolds number from 7.1 × 103 to 2.4 × 104. Fourier transform, continuous wavelet transform, magnitude-square coherence, and wavelet coherence were applied to analyze the cylinder acceleration results for all L/D and wake velocity values studied. The results show that the amplitudes of vibration are below 1.5% of the diameter for all the cases, except for the lower L/D, where the amplitude increases. The first cylinder free to vibrate presents the highest amplitudes observed. Fourier and continuous wavelet analysis showed high energy associated with the two natural frequencies of the system and a third frequency, which may be associated with the flow excitation. In the second cylinder free to vibrate, energy spreads across the monitored spectrum, justifying the smaller amplitudes but the energy level increases with increasing L/D and may be associated with wake-induced vibration. The cases with both cylinders free to vibrate show that the relation between the assembly parameters of each cylinder is relevant to the vibration response and the excitation frequency range. The results showed that even with a clear excitation in a higher frequency, the main energy in the vibration signals is in the natural frequency range. Full article
(This article belongs to the Special Issue Aeroacoustics and Advanced Noise Control)
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