Abo Bibliothek: Guest

ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

UNSTEADY LAMINAR FLOW AND HEAT TRANSFER IN A ROTATING CAVITY WITH A STATIONARY OUTER SURFACE

Get access (open in a dialog) DOI: 10.1615/IHTC11.1300
pages 553-557

Abstrakt

This paper describes the computation of laminar flow and heat transfer in a rotating cavity with a stationary outer surface, using time−dependent, axisymmetric numerical simulations. The geometric configuration is based on a cavity formed by co−rotating turbine discs in a gas−turbine engine. Unsteady flow computations are carried out for a rotational Reynolds number (based on the outer radius of the disc) of 104, with one hot disc and one cold disc. For incompressible flow, a periodic unsteady flow develops, while for computations including variable density effects (through the Boussinesq approximation) the flow reaches a steady−state for some values of Rayleigh number. The computed Nusselt number distribution for the hot disc is significantly affected by unsteady flow and variable density effects. Some of these findings also apply to computations carried out at a higher rotational Reynolds number.