Assessment of an Interface Conservative Algorithm MFBI in a Chimera Grid Flow Solver for Multi-Element Airfoils

Chimera technique has broad applications in complex flow field simulations because of its convenience of the arbitrary boundary interfaces and the easiness of gird generations of subzones. However, the main disadvantage or challenging difficulty lies in the global conservative information exchange between different zones or components. This work aims at assessing the conservation and effects of the mass flux based interpolation (MFBI) in a chimera mufti-grid flow solver where Reynolds-Averaged Navier-Stokes (RAYS) equations and Boldwin-Lomax turbulence model are introduced to calculate the viscous flows over a mufti-element airfoil (NAWC1F2.2) with a flap. Numerical results reveal that, compared to the direct interpolation scheme, the performance of global conservation of MFBI are much better and more coincident with wind-tunnel experiments.