Ekman Layer Scrubbing and Shroud Heat Transfer in Centrifugal Buoyancy-Driven Convection

Gao, Feng; Chew, John W.

doi:10.1115/1.0002739v

Cited by 1 publication

(1 citation statement)

References 23 publications

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“…3 and is described below. The capability of the Boussinesq approximation has been validated in the previous studies [31,32]. The original momentum equation ( 2) is modified to include the Coriolis term and buoyancy generating term on the right-hand side, as shown in Eq.…”

Section: Solver and Governing Equationsmentioning

confidence: 99%

Advanced Modelling of Flow and Heat Transfer in Rotating Disc Cavities Using Open-Source CFD

Wang,

Gao,

Chew

et al. 2023

Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Coo

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Code_Saturne, an open-source computational fluid dynamics (CFD) code, has been applied to a range of problems related to turbomachinery internal air systems. These include a closed rotor-stator disc cavity, a co-rotating disc cavity with radial outflow and a co-rotating disc cavity with axial throughflow. Unsteady Reynolds-averaged Navier-Stokes (RANS) simulations and large eddy simulations (LES) are compared with experimental data and previous direct numerical simulation (DNS) and LES results. The results demonstrate Code_Saturne’s capabilities for predicting flow and heat transfer inside rotating disc cavities. The Boussinesq approximation was implemented into the code for modelling centrifugally buoyant flow and heat transfer in the rotating cavity with axial throughflow. This is validated using recent experimental data and CFD results. Good agreement is found between LES and RANS modelling in some cases, but for the axial throughflow cases, advantages of LES compared to URANS are significant for a high Reynolds number condition. The wall-modelled large eddy simulation (WMLES) method is recommended for balancing computational accuracy and cost in engineering applications.

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Section: Solver and Governing Equationsmentioning

confidence: 99%

Advanced Modelling of Flow and Heat Transfer in Rotating Disc Cavities Using Open-Source CFD

Wang,

Gao,

Chew

et al. 2023

Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Coo

View full text Add to dashboard Cite

show abstract

Ekman Layer Scrubbing and Shroud Heat Transfer in Centrifugal Buoyancy-Driven Convection

Abstract: This paper presents large-eddy and direct numerical simulations of buoyancy-driven convection in sealed and open rapidly rotating cavities for Rayleigh numbers in the range 10 7 -10 9 , and axial throughflow Reynolds numbers 2000 and 5600. Viscous

Cited by 1 publication

References 23 publications

Advanced Modelling of Flow and Heat Transfer in Rotating Disc Cavities Using Open-Source CFD

Advanced Modelling of Flow and Heat Transfer in Rotating Disc Cavities Using Open-Source CFD

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