Interactive Aircraft Section Calculations for Drag

by M. M. Grieshaber, Ecole Centrale de Paris, France,
S. Jayaram, Ecole Centrale de Paris, France,
U. Jayaram, Ecole Centrale de Paris, France,
A. Myklebust, Ecole Centrale de Paris, France,
J. R. Mahan, Ecole Centrale de Paris, France,



Document Type: Proceeding Paper

Part of: University Programs in Computer-Aided Engineering, Design, and Manufacturing

Abstract:

Large interactive computer programs are being called upon with increasing frequency for the preliminary and conceptual design of aircraft. One drag component which can be estimated at the conceptual design stage is the so-called wave drag encountered during supersonic flight. Wave drag depends on the variation with axial station along the aircraft of the area of intersection between the aircraft and the Mach cone. This area can be well estimated by computing the intersections between the aircraft and a sequence of planes oriented at the Mach angle and rotated around the aircraft axis. The development and implementation of software for the interactive calculation of these areas of intersection are described.

Subject Headings: Aircraft and spacecraft | Drag (fluid dynamics) | Intersections | Graphic methods | Fluid dynamics | Conceptual design | Computing in civil engineering

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