Abstract
A preliminary design level methodology for predicting the global aerodynamic characteristics of transport aircraft in low-speed/high-lift configurations has been developed, based on recent advances in computational aerodynamics analysis methods. The new method involves two economical, user oriented, computer programs. One, an advanced lifting-surface theory for the potential flow analysis of swept-wing/body combinations with multi-element high-lift devices, provides the basic theoretical structure. The second program combines potential flow analysis results with available data from previous airplane models to predict the performance of new designs. The overall procedure is highly automated and produces generally satisfactory results for preliminary design purposes. Example results based on recent transport aircraft wind tunnel data are shown.
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