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contributor authorLiu, Yangwei
contributor authorYan, Hao
contributor authorLu, Lipeng
contributor authorLi, Qiushi
date accessioned2017-11-25T07:16:20Z
date available2017-11-25T07:16:20Z
date copyright2016/7/12
date issued2017
identifier issn0098-2202
identifier otherfe_139_02_021107.pdf
identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4233958
description abstractThree-dimensional (3D) corner separation in a linear highly loaded compressor cascade is studied by using delayed detached-eddy simulation (DDES) method. This paper studies the flow mechanism of corner separation, including vortical structures and turbulence characteristics. The vortical structures are analyzed and the distributions of Reynolds stresses and turbulent anisotropy are also discussed in detail. The results show that there exist different kinds of vortical structures, such as horseshoe vortex, passage vortex, wake shedding vortex, and “corner vortex.” Before the corner separation forms, the passage vortex becomes the main secondary vortex and obviously enhances the corner separation. At approximate 35% chord position, the corner vortex begins to form, enlarges rapidly, and dominates the secondary flow in the cascade. The corner vortex is a compound vortex with its vortex core composed of multiple vortices. Streamwise normal Reynolds stress contributes greatest to the turbulence fluctuation in the corner region. The turbulence develops from two-dimensional (2D) turbulence in the near-wall region to one-component type turbulence in the corner region. The turbulence tends to be more anisotropic when the flow is close to the endwall within the corner separation region.
publisherThe American Society of Mechanical Engineers (ASME)
titleInvestigation of Vortical Structures and Turbulence Characteristics in Corner Separation in a Linear Compressor Cascade Using DDES
typeJournal Paper
journal volume139
journal issue2
journal titleJournal of Fluids Engineering
identifier doi10.1115/1.4034871
journal fristpage21107
journal lastpage021107-14
treeJournal of Fluids Engineering:;2017:;volume( 139 ):;issue: 002
contenttypeFulltext


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