Results 111 to 120 of about 21,521 (207)

Evaluation of Aerodynamic and Sonic Boom Performance of Supersonic Transport Aircrafts with Multiple Wing Configurations

Aerospace
In this study, two-dimensional airfoil shapes obtained in aerodynamic optimizations are converted to three-dimensional wing models and then their aerodynamic and sonic boom performance are evaluated. The airfoil shapes analyzed are the diamond, Busemann,
Wataru Yamazaki, Shu Ishida
doaj   +1 more source

Improvements to tilt rotor performance through passive blade twist control [PDF]

A passive blade twist control is presented in which the twist distribution of a tilt rotor blade is elastically changed as a function of rotor speed. The elastic twist deformation is used to achieve two different blade twist distributions corresponding ...
Nixon, Mark W.
core   +1 more source

Aerodynamic design using numerical optimization [PDF]

The procedure of using numerical optimization methods coupled with computational fluid dynamic (CFD) codes for the development of an aerodynamic design is examined.
Chapman, G. T., Murman, E. M.
core   +1 more source

Application of numerical optimization to the design of wings with specified pressure distributions [PDF]

A practical procedure for the optimum design of transonic wings is demonstrated. The procedure uses an optimization program based on the method of feasible directions coupled with an aerodynamic analysis program which solves the three-dimensional ...
Haney, H. P., Johnson, R. R.
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Review of aerodynamic design in the Netherlands [PDF]

Aerodynamic design activities in the Netherlands, which take place mainly at Fokker, the National Aerospace Laboratory (NLR), and Delft University of Technology (TUD), are discussed.
Labrujere, Th. E.
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Overview of two-dimensional airfoil research at Ames Research Center [PDF]

The five basic elements of the two dimensional airfoil research program at Ames Research Center are illustrated. These elements are experimental, theoretical (including computational), validation, design optimization, and industry interaction.
Chapman, G. T.
core   +1 more source

Optimization of Flapping Airfoils for Maximum Thrust and Propulsive Efficiency

Acta Polytechnica, 2004
A numerical optimization algorithm based on the steepest decent along the variation of the optimization function is implemented for maximizing the thrust and/or propulsive efficiency of a single flapping airfoil.
I. H. Tuncer, M. Kay
doaj  

On simple aerodynamic sensitivity derivatives for use in interdisciplinary optimization [PDF]

Low-aspect-ratio and piston aerodynamic theories are reviewed as to their use in developing aerodynamic sensitivity derivatives for use in multidisciplinary optimization applications.
Doggett, Robert V., Jr.
core   +1 more source

Shape Parameterization and Efficient Optimization Design Method for the Ray-like Underwater Gliders. [PDF]

Biomimetics (Basel)
Zhang D, Zeng D, Zhou H, Bao C, Liu Q.
europepmc   +1 more source

Research on Design and Control Method of Flexible Wing Ribs with Chordwise Variable Camber. [PDF]

Biomimetics (Basel)
Tao X, Bin L.
europepmc   +1 more source