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Research Papers

A Study of Acoustic Wave Resonance in Water-Filled Tubes With Different Wall Thicknesses and Materials

[+] Author and Article Information
Alireza Mokhtari

Department of Mechanical Engineering,
University of Manitoba,
75A Chancellors Circle, Winnipeg, MB R3T 5V6, Canada
e-mail: ummokhta@myumanitoba.ca

Vijay Chatoorgoon

Department of Mechanical Engineering,
University of Manitoba,
75A Chancellors Circle, Winnipeg, MB R3T 5V6, Canada
e-mail: vijay.chatoorgoon@umanitoba.ca

1Corresponding author.

Manuscript received July 3, 2015; final manuscript received February 1, 2016; published online June 17, 2016. Assoc. Editor: Mark Anderson.

ASME J of Nuclear Rad Sci 2(3), 031011 (Jun 17, 2016) (14 pages) Paper No: NERS-15-1144; doi: 10.1115/1.4032781 History: Received July 03, 2015; Accepted February 01, 2016

Acoustic resonance of a fluid-filled tube with closed and open outlet ends for zero and turbulent mean flows is investigated both experimentally and numerically for different wall materials and thicknesses. The main goal is to create a data bank of acoustic wave resonance in fluid-filled tubes at a frequency range of 20–500 Hz to validate and verify numerical prediction models used by the nuclear industry and to determine if there is a better method with existing technology. The experimental results show that there is a strong effect of turbulent flow, wall material, and wall thickness on resonant amplitudes at frequencies above 250  Hz. A numerical investigation is performed solving the linear wave equation with constant and frequency-dependent damping terms and a computational fluid dynamic (CFD) code. Comparing the one-dimensional (1D) and CFD results shows that CFD solution yields better predictions of both resonant frequency and amplitude than the 1D solution without the need for simplified added damping methods, which are required by the 1D methodology. This finding is valid especially for frequencies higher than 300  Hz.

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References

Figures

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Fig. 1

Schematic diagram of the experiment

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Fig. 2

Comparison between results of the “6.13 m long 10 mm OD SS closed-end experiment,” LWS and CFD predictions. (a) First resonant mode, (b) second resonant mode, (c) third resonant mode, and (d) fourth resonant mode

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Fig. 3

Comparison between results of the “6.13 m long 12 mm OD SS closed-end experiment,” LWS and CFD predictions. (a) First resonant mode, (b) second resonant mode, (c) third resonant mode, and (d) fourth resonant mode

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Fig. 4

Prediction methods RMSE for SS and Al tubes: (a) Frequency and (b) amplitude

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Fig. 5

Resonant amplitude prediction relative errors for SS tubes

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Fig. 6

Comparison between results of the “6.13 m long 12 mm OD Al closed-end experiment,” LWS and CFD predictions. (a) First resonant mode, (b) second resonant mode, (c) third resonant mode, and (d) fourth resonant mode

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Fig. 7

Resonant amplitude prediction relative errors for Al tube

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Fig. 8

Radial profiles of the computed axial velocity with CFD at two different resonant frequencies for a period of time

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Fig. 9

Comparison between no flow and turbulence results of the “6.13 m long 10 mm OD SS open-ended experiments” at (a) 1.46, (b) 2.54, and (c) 4.65 m

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Fig. 10

Comparison between zero mean flow results of the “10 mm OD SS open-ended experiments at 1.46 m,” LWS and CFD predictions. (a) First resonant mode, (b) second resonant mode, (c) third resonant mode, and (d) fourth resonant mode

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Fig. 11

Comparison between zero mean flow results of the “10 mm OD SS open-ended experiments at 2.54 m,” LWS and CFD predictions. (a) First resonant mode, (b) second resonant mode, (c) third resonant mode, and (d) fourth resonant mode

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Fig. 12

Comparison between zero mean flow results of the “10 mm OD SS open-ended experiments at 4.65 m,” LWS and CFD predictions. (a) First resonant mode, (b) second resonant mode, (c) third resonant mode, and (d) fourth resonant mode

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Fig. 13

Resonant amplitude prediction relative errors for zero flow

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Fig. 14

Zero mean flow amplitude prediction RMS: (a) frequency and (b) amplitude

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Fig. 15

Resonant amplitude prediction relative errors for turbulent flow

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Fig. 16

Radial profiles of the computed axial velocity with CFD at the fourth resonant frequency, at P3. (a) Turbulent flow and (b) zero mean flow

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Fig. 17

Turbulent kinetic energy and turbulence eddy dissipation at the fourth resonant frequency, at P3

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