Numerical investigation of the flow and heat transfer characteristics for a pre-swirl rotor–stator system with center inflow

Numerical investigation on the flow and heat transfer characteristics in radial pre-swirl system with different fillet radius at the junction of inlet cavity and nozzle

“…Variations of radius ratio of pre-swirl nozzles to receiver holes, the preswirl cavity height and the pre-swirl cavity width were selected by Jarzombek et al [20] to investigate its' effects on the adiabatic effectiveness and total pressure loss. Zhang et al [21] numerically investigated the effect of center seal inflow on the flow and heat transfer performance of the pre-swirl system. Snowsill and Young [22] adopted a by-pass passage which played a role to separate the seal flow from the pre-swirl cooling flow, and this significantly reduced the relative total temperature of the air fed to blade.…”

Numerical investigation of fluid flow in a rotor–stator cavity with curved rotor disk

“…A numerical study by Liao et al [28] has revealed that the pressure ratio has an important effect on the magnitude of heat transfer coefficient and the rotating speed has a significant effect on the displacement of locations with high heat transfer coefficient. By considering a center inflow in a pre-swirl rotorstator system, Zhang et al [29] investigated its effects on flow structure and heat transfer and presented a theoretical expression for adiabatic effectiveness with center flow.…”