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dc.contributor.authorSun, W
dc.contributor.authorXu, L
dc.date.accessioned2021-12-02T02:54:39Z
dc.date.available2021-12-02T02:54:39Z
dc.date.issued2021
dc.identifier.issn2515-3080
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/331206
dc.description.abstract<jats:p>In this paper, an investigation into the effect of explicit non-linear turbulence modelling on anisotropic turbulence flows is presented. Such anisotropic turbulence flows are typified in the corner separations in turbomachinery. The commonly used Reynolds-Averaged Navier-Stokes (RANS) turbulence closures, in which the Reynolds stress tensor is modelled by the Boussinesq (linear) constitutive relation with the mean strain-rate tensor, often struggle to predict corner separation with reasonable accuracy. The physical reason for this modelling deficiency is partially attributable to the Boussinesq hypothesis which does not count for the turbulence anisotropy, whilst in a corner separation, the flow is subject to three-dimensional (3D) shear and the effects due to turbulence anisotropy may not be ignored. In light of this, an explicit non-linear Reynolds stress-strain constitutive relation developed by Menter et al. is adopted as a modification of the Reynolds-stress anisotropy. Coupled with the Menter’s hybrid "k-ω" ⁄"k-ε" turbulence model, this non-linear constitutive relation gives significantly improved predictions for the corner separation flows within a compressor cascade, at both the design and off-design flow conditions. The mean vorticity field are studied to further investigate the physical reasons for these improvements, highlighting its potential for the widespread applications in the corner separation prediction.</jats:p>
dc.publisherGlobal Power and Propulsion Society
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleImprovement of corner separation prediction using an explicit non-linear rans closure
dc.typeArticle
prism.endingPage65
prism.publicationDate2021
prism.publicationNameJournal of the Global Power and Propulsion Society
prism.startingPage50
prism.volume5
dc.identifier.doi10.17863/CAM.78653
rioxxterms.versionofrecord10.33737/jgpps/133913
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2021-01-01
dc.identifier.eissn2515-3080
rioxxterms.typeJournal Article/Review
cam.issuedOnline2021-04-07


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Attribution-NonCommercial-NoDerivatives 4.0 International
Except where otherwise noted, this item's licence is described as Attribution-NonCommercial-NoDerivatives 4.0 International