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    Flow and Heat Transfer in a Rotating Disc Cavity With Axial Throughflow at High-Speed Conditions

    Source: Journal of Turbomachinery:;2025:;volume( 147 ):;issue: 009::page 91005-1
    Author:
    Wang, Ruonan
    ,
    Chew, John W.
    ,
    Gao, Feng
    ,
    Marxen, Olaf
    DOI: 10.1115/1.4067437
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Flow and heat transfer in a compressor rotating disc cavity with axial throughflow is investigated using wall-modeled large-eddy simulations (WMLES). These are compared to measurements from recently published experiments and used to investigate high Reynolds number effects. The simulations use an open-source computational fluid dynamics solver with high parallel efficiency and employ the Boussinesq approximation for centrifugal buoyancy. Kinetic energy effects (characterized by Eckert number) are accounted for by scaling the thermal boundary conditions from static temperature to rotary stagnation temperature. The WMLES shows very encouraging agreement with experiments up to the highest Reynolds number tested, Reϕ=3.0×106. A further simulation at Reϕ=107 extends the investigation to an operating condition more representative of aero engine high-pressure compressors. The results support the scaling of shroud heat transfer found at lower Reϕ, but disc heat transfer is higher than expected from a simple extrapolation of lower Reϕ results. This is associated with transition to turbulence in the disc Ekman layers and is consistent with the boundary layer Reynolds numbers at this condition. The introduction of swirl in the axial throughflow, as may occur at engine conditions, could reduce the boundary layer Reynolds numbers and delay the transition.
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      Flow and Heat Transfer in a Rotating Disc Cavity With Axial Throughflow at High-Speed Conditions

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4306268
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    contributor authorWang, Ruonan
    contributor authorChew, John W.
    contributor authorGao, Feng
    contributor authorMarxen, Olaf
    date accessioned2025-04-21T10:28:26Z
    date available2025-04-21T10:28:26Z
    date copyright2/6/2025 12:00:00 AM
    date issued2025
    identifier issn0889-504X
    identifier otherturbo-24-1167.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4306268
    description abstractFlow and heat transfer in a compressor rotating disc cavity with axial throughflow is investigated using wall-modeled large-eddy simulations (WMLES). These are compared to measurements from recently published experiments and used to investigate high Reynolds number effects. The simulations use an open-source computational fluid dynamics solver with high parallel efficiency and employ the Boussinesq approximation for centrifugal buoyancy. Kinetic energy effects (characterized by Eckert number) are accounted for by scaling the thermal boundary conditions from static temperature to rotary stagnation temperature. The WMLES shows very encouraging agreement with experiments up to the highest Reynolds number tested, Reϕ=3.0×106. A further simulation at Reϕ=107 extends the investigation to an operating condition more representative of aero engine high-pressure compressors. The results support the scaling of shroud heat transfer found at lower Reϕ, but disc heat transfer is higher than expected from a simple extrapolation of lower Reϕ results. This is associated with transition to turbulence in the disc Ekman layers and is consistent with the boundary layer Reynolds numbers at this condition. The introduction of swirl in the axial throughflow, as may occur at engine conditions, could reduce the boundary layer Reynolds numbers and delay the transition.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleFlow and Heat Transfer in a Rotating Disc Cavity With Axial Throughflow at High-Speed Conditions
    typeJournal Paper
    journal volume147
    journal issue9
    journal titleJournal of Turbomachinery
    identifier doi10.1115/1.4067437
    journal fristpage91005-1
    journal lastpage91005-10
    page10
    treeJournal of Turbomachinery:;2025:;volume( 147 ):;issue: 009
    contenttypeFulltext
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