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

OM Ilori; X Mao; AJ Jaworski

doi:10.18462/iir.icr.2015.0523

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

OM Ilori, X Mao, AJ Jaworski

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Citations (Scopus)

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 language	English
Title of host publication	Proceedings of the 24th IIR International Congress on Refrigeration (ICR)
Subtitle of host publication	Improving Quality of Life, Preserving the Earth, (Yokohama, Japan: 16-22 August 2015)
Publisher	International Institute of Refrigeration
Number of pages	8
ISBN (Print)	9781510812062
DOIs	https://doi.org/10.18462/iir.icr.2015.0523
Publication status	Published - 1 Aug 2015
Externally published	Yes
Event	24th IIR International Congress of Refrigeration: Improving Quality of Life, Preserving the Earth - Yokohama, Japan Duration: 16 Aug 2015 → 22 Aug 2015 Conference number: 24 http://www.icr2015.org/ (Link to Conference Website )

Conference

Conference	24th IIR International Congress of Refrigeration
Abbreviated title	ICR 2015
Country/Territory	Japan
City	Yokohama
Period	16/08/15 → 22/08/15
Internet address	http://www.icr2015.org/ (Link to Conference Website )

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Cite this

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title = "CFD study of oscillatory flow through 90º bends of thermoacoustic devices",

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.",

keywords = "Flow, Periodic phenomenon, Simulation, Thermoacoustics, Geometry, Wave",

author = "OM Ilori and X Mao and AJ Jaworski",

year = "2015",

month = aug,

day = "1",

doi = "10.18462/iir.icr.2015.0523",

language = "English",

isbn = "9781510812062",

booktitle = "Proceedings of the 24th IIR International Congress on Refrigeration (ICR)",

publisher = "International Institute of Refrigeration",

address = "France",

note = "24th IIR International Congress of Refrigeration : Improving Quality of Life, Preserving the Earth, ICR 2015 ; Conference date: 16-08-2015 Through 22-08-2015",

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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 proceeding › Conference contribution › peer-review

TY - GEN

T1 - CFD study of oscillatory flow through 90º bends of thermoacoustic devices

AU - Ilori, OM

AU - Mao, X

AU - Jaworski, AJ

N1 - Conference code: 24

PY - 2015/8/1

Y1 - 2015/8/1

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.

KW - Flow

KW - Periodic phenomenon

KW - Simulation

KW - Thermoacoustics

KW - Geometry

KW - Wave

U2 - 10.18462/iir.icr.2015.0523

DO - 10.18462/iir.icr.2015.0523

M3 - Conference contribution

SN - 9781510812062

BT - Proceedings of the 24th IIR International Congress on Refrigeration (ICR)

PB - International Institute of Refrigeration

T2 - 24th IIR International Congress of Refrigeration

Y2 - 16 August 2015 through 22 August 2015

ER -

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

Abstract

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