Entropy Generation of Secondary Flow in a Turning Passage with Different Boundary Layer Characteristics

The development of secondary flow along a curved channel is fundamental phenomenon occurring in wide range engineering applications, including turbomachinery, aerospace, heating, ventilation, air conditioning, etc. underlying physics about end-wall flows has been well-documented the open literature, while interaction between and side-wall boundary layer, which critical to aerothermal performance surface, not comprehensively studied. In this study, entropy generation an passage vortex layer were numerically investigated by Reynolds-averaged Navier–Stokes (RANS) CFD for 90° channel. transportation effect mechanism induced pair on side wall reported. It was also found that growth can be suppressed due displacement layer. Furthermore, it provides suppression separation.