Abstract

This paper focuses on aero-structural optimization of wing for long range transport aircraft, using Adjoint based optimization. The paper explores and compares attainable limit such as attainable L/D vs. Mach number, which may be appreciable higher than the historical trend typically used in conceptual design. It also seeks to identify a discernable trend in the planform variables such as sweep, thickness-to-chord ratio, aspect ratio, and chords for optimum wings. Results form wing-fuselage and complete-aircraft-configuration optimizations indicate that by stretching the span together with decreasing sweep and thickening the wing sections the lift-to-drag ratio can be increased without any penalty on the structure weight. I.

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