CFD study of oscillatory flow through 90º bends of thermoacoustic devices

OM Ilori, X Mao, AJ Jaworski

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Numerical simulation is performed to investigate oscillatory flow through 90º bends of a thermoacoustic system. Bends are often used in thermoacoustic systems as parts of acoustic networks. In the feedback loop, geometrical changes can cause system losses and it is often important to find optimal bend curvature radius that keeps the losses to the minimum. This paper investigates the effects of radius of curvature on the properties of the acoustic wave propagating through 90º bends, using 3D Computational Fluid Dynamics (CFD) simulation approach. Oscillatory flow phenomena are investigated using RANS method with SST k-ω turbulent model. Two curvature radii are considered with the drive ratio of acoustic excitation up to 0.65 The simulation results are analysed with respect to the acoustic Dean Number and the associated flow phenomena causing losses in the bend are described. The results suggest an interesting lead that is worthy of further investigation.
Original languageEnglish
Title of host publicationProceedings of the 24th IIR International Congress on Refrigeration (ICR)
Subtitle of host publicationImproving Quality of Life, Preserving the Earth, (Yokohama, Japan: 16-22 August 2015)
PublisherInternational Institute of Refrigeration
Number of pages8
ISBN (Print)9781510812062
DOIs
Publication statusPublished - 1 Aug 2015
Externally publishedYes
Event24th IIR International Congress of Refrigeration: Improving Quality of Life, Preserving the Earth - Yokohama, Japan
Duration: 16 Aug 201522 Aug 2015
Conference number: 24
http://www.icr2015.org/ (Link to Conference Website )

Conference

Conference24th IIR International Congress of Refrigeration
Abbreviated titleICR 2015
CountryJapan
CityYokohama
Period16/08/1522/08/15
Internet address

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Thermoacoustics
Computational fluid dynamics
Acoustics
Computer simulation
Lead
Acoustic waves
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Cite this

Ilori, OM., Mao, X., & Jaworski, AJ. (2015). CFD study of oscillatory flow through 90º bends of thermoacoustic devices. In Proceedings of the 24th IIR International Congress on Refrigeration (ICR): Improving Quality of Life, Preserving the Earth, (Yokohama, Japan: 16-22 August 2015) International Institute of Refrigeration. https://doi.org/10.18462/iir.icr.2015.0523
Ilori, OM ; Mao, X ; Jaworski, AJ. / CFD study of oscillatory flow through 90º bends of thermoacoustic devices. Proceedings of the 24th IIR International Congress on Refrigeration (ICR): Improving Quality of Life, Preserving the Earth, (Yokohama, Japan: 16-22 August 2015). International Institute of Refrigeration, 2015.
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abstract = "Numerical simulation is performed to investigate oscillatory flow through 90º bends of a thermoacoustic system. Bends are often used in thermoacoustic systems as parts of acoustic networks. In the feedback loop, geometrical changes can cause system losses and it is often important to find optimal bend curvature radius that keeps the losses to the minimum. This paper investigates the effects of radius of curvature on the properties of the acoustic wave propagating through 90º bends, using 3D Computational Fluid Dynamics (CFD) simulation approach. Oscillatory flow phenomena are investigated using RANS method with SST k-ω turbulent model. Two curvature radii are considered with the drive ratio of acoustic excitation up to 0.65 The simulation results are analysed with respect to the acoustic Dean Number and the associated flow phenomena causing losses in the bend are described. The results suggest an interesting lead that is worthy of further investigation.",
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Ilori, OM, Mao, X & Jaworski, AJ 2015, CFD study of oscillatory flow through 90º bends of thermoacoustic devices. in Proceedings of the 24th IIR International Congress on Refrigeration (ICR): Improving Quality of Life, Preserving the Earth, (Yokohama, Japan: 16-22 August 2015). International Institute of Refrigeration, 24th IIR International Congress of Refrigeration, Yokohama, Japan, 16/08/15. https://doi.org/10.18462/iir.icr.2015.0523

CFD study of oscillatory flow through 90º bends of thermoacoustic devices. / Ilori, OM; Mao, X; Jaworski, AJ.

Proceedings of the 24th IIR International Congress on Refrigeration (ICR): Improving Quality of Life, Preserving the Earth, (Yokohama, Japan: 16-22 August 2015). International Institute of Refrigeration, 2015.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - Numerical simulation is performed to investigate oscillatory flow through 90º bends of a thermoacoustic system. Bends are often used in thermoacoustic systems as parts of acoustic networks. In the feedback loop, geometrical changes can cause system losses and it is often important to find optimal bend curvature radius that keeps the losses to the minimum. This paper investigates the effects of radius of curvature on the properties of the acoustic wave propagating through 90º bends, using 3D Computational Fluid Dynamics (CFD) simulation approach. Oscillatory flow phenomena are investigated using RANS method with SST k-ω turbulent model. Two curvature radii are considered with the drive ratio of acoustic excitation up to 0.65 The simulation results are analysed with respect to the acoustic Dean Number and the associated flow phenomena causing losses in the bend are described. The results suggest an interesting lead that is worthy of further investigation.

AB - Numerical simulation is performed to investigate oscillatory flow through 90º bends of a thermoacoustic system. Bends are often used in thermoacoustic systems as parts of acoustic networks. In the feedback loop, geometrical changes can cause system losses and it is often important to find optimal bend curvature radius that keeps the losses to the minimum. This paper investigates the effects of radius of curvature on the properties of the acoustic wave propagating through 90º bends, using 3D Computational Fluid Dynamics (CFD) simulation approach. Oscillatory flow phenomena are investigated using RANS method with SST k-ω turbulent model. Two curvature radii are considered with the drive ratio of acoustic excitation up to 0.65 The simulation results are analysed with respect to the acoustic Dean Number and the associated flow phenomena causing losses in the bend are described. The results suggest an interesting lead that is worthy of further investigation.

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Ilori OM, Mao X, Jaworski AJ. CFD study of oscillatory flow through 90º bends of thermoacoustic devices. In Proceedings of the 24th IIR International Congress on Refrigeration (ICR): Improving Quality of Life, Preserving the Earth, (Yokohama, Japan: 16-22 August 2015). International Institute of Refrigeration. 2015 https://doi.org/10.18462/iir.icr.2015.0523