| Title |
Numerical Analysis on the Flow Field and Heat Transfer Characteristics of Longitudinal Vortices in Turbulent Boundary Layer : On the Common Flow Down |
| Keywords |
Half-delta winglet ; 반삼각익 ; Heat transfer ; 열전달 ; Vortex generator ; 와동발생기 ; Longitudinal vortex ; 종방향 와동 ; Pseudo-compressibility ; 준압축성 |
| Abstract |
This paper is a numerical study concerning how the interactions between a pair of the vortices effect flow field and heat transfer. The flow field(common flow down) behind a vortex generator is modeled by the information that is available from studies on a half-delta winglet. Also, the energy equation and the Reynolds-averaged Navier-Stokes equation for three-dimensional turbulent flows, together with a two-layer turbulence model to resolve the near-wall flow, are solved by the method of AF-ADI. The present results predict that the boundary layer is thinned in the regions where the secondary flow is directed toward the wall and thickened where it is directed away from the wall. Although some discrepancies are observed near the center of the vortex core, the overall performance of the computational model is found to be satisfactory. |