The effect of aspect ratio on the flow characteristics of a Hybrid Solar Receiver Combustor

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dc.contributor.authorLong, S.
dc.contributor.authorLau, T.
dc.contributor.authorChinnici, A.
dc.contributor.authorTian, Z.
dc.contributor.authorDally, B.
dc.contributor.authorNathan, G.
dc.contributor.conference21st Australasian Fluid Mechanics Conference (10 Dec 2018 - 13 Dec 2018 : Adelaide, Australia)
dc.date.issued2018
dc.description.abstractWe present a systematic experimental study of the interaction between four rotationally-symmetric jets within a cylindrical chamber, under conditions relevant to a wide range of practical applications, including the Hybrid Solar Receiver Combustor (HSRC). The HSRC geometry is simplified here to a cylindrical cavity with four inlet jets (representing four burners), which are configured in an annular arrangement and aligned at an inclination angle (αj) to the axis with a tangential component (azimuthal angle θj) to generate a swirl in the chamber. In this study, we assess the configurations of αj = 25° and θj = 5°. The length of the chamber was varied from Lc = 148 mm to 74 mm and the diameter of the chamber was Dc = 74 mm, resulting in an aspect ratio of Lc/Dc = 2, 1.5 and 1. The inlet Reynolds number for each injected jet and the number of jets were fixed at ReD = 10,500 and 4, respectively. Velocity data obtained with Particle Image Velocimetry (PIV) were used to characterise the large-scale flow field within the selected experimental configurations. The results reveal a significant dependence of the mean flow-field on the aspect ratio Lc/Dc for the value of αj and θj considered here. More specifically, it was found that Lc/Dc can influence the position of the external recirculation zone (ERZ), the strength of the central resulting jet, and the recirculation rate (Kv).
dc.description.statementofresponsibilityS. Long, T.C.W. Lau, A. Chinnici, Z.F. Tian, B.B. Dally, G.J. Nathan
dc.identifier.citationProceedings of the 21st Australasian Fluid Mechanics Conference (AFMC 2018), 2018, pp.1-4
dc.identifier.isbn9780646597843
dc.identifier.orcidLong, S. [0000-0001-5622-3535]
dc.identifier.orcidLau, T. [0000-0003-1851-706X]
dc.identifier.orcidChinnici, A. [0000-0002-0743-3904]
dc.identifier.orcidTian, Z. [0000-0001-9847-6004]
dc.identifier.orcidNathan, G. [0000-0002-6922-848X]
dc.identifier.urihttp://hdl.handle.net/2440/124788
dc.language.isoen
dc.publisherAustralian Fluid Mechanics Society
dc.relation.granthttp://purl.org/au-research/grants/arc/LP110200060
dc.rightsCommencing with 19AFMC, the Society holds copyright to papers which appear in the Proceedings. Prior to that, copyright resides with authors of the papers.
dc.source.urihttps://people.eng.unimelb.edu.au/imarusic/proceedings/21%20AFMC%20TOC.html
dc.titleThe effect of aspect ratio on the flow characteristics of a Hybrid Solar Receiver Combustor
dc.typeConference paper
pubs.publication-statusPublished

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