Heat Transfer Performance of a New Fan-Shaped Pin-Fin in Internal Cooling Channel

Prediction of convective heat transfer around a pin-fin of novel fan-shape has been performed with Reynolds-averaged Navier-Stokes (RANS) analysis in comparison with a circular pin-fin. The low-Reynolds number shear stress transport (SST) model has been selected as the turbulence closure model by comparing the performance with those of the standard k-ε and k-ω models. The fan-shaped pin-fin has shown remarkably improved heat transfer performance compared to the circular pin-fin over the whole range of Reynolds number (Re = 5,000–100,000). A parametric study with two geometric parameters of the fan-shaped pin-fin, the lateral reduction angle of the fan-shaped pin-fin and radius of rear part of pin-fin has been performed to find their effects on heat transfer and friction loss.