Unsteady measurement of core penetration flow caused by rotating geometric non-axisymmetry in a turbine rotor-stator disc cavity

Kim, You Il; Song, Seung Jin

doi:10.1016/j.expthermflusci.2019.05.017

Cited by 12 publications

(1 citation statement)

References 16 publications

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“…Reference [14] also numerically examined the heat transfer properties in the rotor-stator cavity using steady-state flow analysis. Kim et al [15] conducted an experimental study of the central flow region of the rotorstator disk cavity on a low-speed turbine test facility. Yang et al [16] numerically and experimentally investigated the flow and heat transfer for a simplified rotor-stator pre-swirl system with the radial outflow.…”

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confidence: 99%

Analysis of Convective Heat Exchanges and Fluid Dynamics in the Air Gap of a Discoid Technology Rotary Machine

Hannaoui,

Boutarfa,

Haidar

2024

FHMT

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The proposed work focuses on the in-depth study of convective heat transfer in the unconfined air gap of a discoidal rotor-stator system. The rotary cooling mechanism is achieved by the injection of two air jets, while the cavity geometry is characterized by a dimensionless parameter G. The numerical analysis primarily concentrated on the effect of flow velocity and rotation on the heat exchange process. More precisely, the range of analysis extends from the rotational Reynolds number Re ω = 2.35 × 10 5 to Re ω = 5.04 × 10 5 , while varying the Reynolds value of the jet in a range from 16 × 10 3 to 55.46 × 10 3 . To carry out this analysis, a numerical simulation was conducted with Ansys-Fluent software, using the RSM turbulence model. The results of the study significantly reveal the impact of rotation on heat exchange transfer within the cavity, identifying two distinct zones of fluid recirculation. These zones exhibit remarkable heat transfer characteristics, contributing to a better understanding of the complex mechanisms governing heat transfer in this particular technological context. Additionally, the analysis of radial mean velocity distributions, as well as local and mean Nusselt numbers, provides further insight into the heat transfer performance of this unique configuration.

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confidence: 99%