No abstract

Extensive unstructured-grid CFD analysis has been performed for predicting performance of a twin-engine commercial transport airplane in landing configuration. The objective of the work was to identify and resolve complex gridding and solver related issues relevant to accurate prediction of complex flow physics associated with airplane high-lift systems. A variety of grid generation and CFD solution techniques were investigated for their efficacy in predicting performance of a complete airplane including high-lift devices e.g., multiple flaps and slats, and nacelle chines. Both steady and unsteady Reynolds Averaged Navier-Stokes (RANS) solution techniques were utilized. The role of relevant flowphysics phenomena in attainment of maximum lift as well as computational requirements for adequately modeling these phenomena were investigated. Computed aerodynamic forces are compared with available wind-tunnel test data.

No abstract