Numerical simulation of flow and heat transfer inside co-rotating disc cavity with de-swirled radial inflow

Numerical simulations were carried out to study the flow and heat transfer characteristics inside co-rotating disc cavity.The RNG turbulence model was applied to investigate the pressure loss across the disc cavity and the influences of non-dimensional mass flow coefficient,rotational Reynolds number and turbulent flow parameter on the flow and heat transfer.Results show that flow structure inside the cavity is mainly decided by turbulence flow parameter;under a constant value of rotational Reynolds number and the variation of flow rate,the pressure drop exhibits an S-curve behavior in which there are three different values of flow rate for each value of pressure drop;the pressure drop across the cavity can be effectively reduced with the use of de-swirled nozzles;the Nusselt number rises with the increase of non-dimensional mass flow coefficient and rotational Reynolds number.