TITLE:

Minimum Induced Drag Theorems for Innovative Wing Systems

DATE:

Friday, April 29th, 2016

TIME:

3:30 PM

LOCATION:

GMCS 214

SPEAKER:

Dr. Luciano Demasi. Associate Professor, Department of Aerospace Engineering and Computational Science Research Center, San Diego State

University.

ABSTRACT:

Induced drag is an important component of the total airplane drag, especially at low speed conditions.

Reducing it is one of the top priorities for the design of future sustainable configurations which are aimed to significantly cut pollution and

emissions.

This is one of the driving motivations behind the idea of innovative systems such as Box Wings: it is well known that non-planar geometry has high

benefits in terms of induced drag.

A configuration-invariant computationally efficient induced drag minimization procedure, tailored for the preliminary design phases of generic

non-planar multi-wing systems is presented. The method is based on a variational approach, which leads to the formulation of a system of coupled

integral equations in the unkown circulation distributions.

Prandtl’s problem on the optimal conditions for Box Wings has been solved and the minimum induced drag conditions for closed systems have been

related to the ones corresponding to C-wings and Biwings.

Several new induced drag theorems have been introduced providing design indications on generic wing systems without the need of computationally

expensive simulations.

HOST:

Dr. Satchi Venkataraman

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