Velocity and temperature measurements in a turbulent water-filled Taylor-Couette-Poiseuille system

Abstract : Motivated by the difficulties encountered by engineers to cool down the rotating shafts of industrial machines, the present work investigates the heat and mass transfers in the rotor-stator gap of a Taylor–Couette system with an axial water flow characterized by an aspect ratio Γ = 50 and a radius ratio η = 8/9. Extensive velocity and temperature measurements have been performed on an experimental set-up for a wide range of the flow parameters: the axial Reynolds number Re and the Taylor number Ta reach the values 1.12 × 104 and 7.9 × 107 respectively. In particular, coherent structures close to the rotating wall were measured by Stereo Particle Image Velocimetry. A correlation for the Nusselt number Nu on the rotating wall is finally provided against the axial Reynolds, Taylor and Prandtl numbers. Nu is proportional to the Taylor number to the power ∼0.13 close to the exponent 1/7 highlighted by an analytical model. This small exponent traduces the control of heat transfers by the rotating viscous layer and thus may explain the difficulty met by engineers to develop strategies for the effective cooling of such rotating apparatus.
Type de document :
Article dans une revue
International Journal of Thermal Sciences, Elsevier, 2015
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01467719
Contributeur : Kelly Ohanessian <>
Soumis le : mardi 14 février 2017 - 16:18:55
Dernière modification le : lundi 4 mars 2019 - 14:04:17

Identifiants

  • HAL Id : hal-01467719, version 1

Collections

Citation

Adrien Aubert, Sébastien Poncet, Patrice Le Gal, Stéphane Viazzo, Michel Lebars. Velocity and temperature measurements in a turbulent water-filled Taylor-Couette-Poiseuille system. International Journal of Thermal Sciences, Elsevier, 2015. 〈hal-01467719〉

Partager

Métriques

Consultations de la notice

44