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METHODS FOR ANALYSIS OF TWO-DIMENSIONAL AIRFOILS WITH SUBSONIC AND TRANSONIC APPLICATIONS.
Jonathan Bennett, S. H. Goradia
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Abstract
The report presents a method for describing the subsonic, viscid, attached flow about two-dimensional airfoils with applications to transonic flow. The method utilizes state-of-the-art technology to analyze all aspects of the flow and combines boundary layer solutions with inviscid pressure distribution prediction methods to obtain a 'complete' solution. This complete solution is represented by a pressure distribution at any point on the airfoil which relects the viscid, inviscid, and compressible effects in proper combination. The solution is programmed for an IBM7094 computer in which the required inputs are freestream flow conditions and airfoil geometry only. The program computes the pressure and boundary layer distribution using an iterative procedure to attain equilibrium conditions. These data, as well as the lift, drag and pitching moment of the viscid solution and the inviscid pressure distribution are provided as output. Methods for applying the results to analyze practical subsonic and transonic design problems are discussed. (Author)