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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