Transonic airfoil design for helicopter rotor applications [PDF]
Despite the fact that the flow over a rotor blade is strongly influenced by locally three-dimensional and unsteady effects, practical experience has always demonstrated that substantial improvements in the aerodynamic performance can be gained by ...
Hassan, Ahmed A., Jackson, B.
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TRANDESNF: A computer program for transonic airfoil design and analysis in nonuniform flow [PDF]
The use of a transonic airfoil code for analysis, inverse design, and direct optimization of an airfoil immersed in propfan slipstream is described. A summary of the theoretical method, program capabilities, input format, output variables, and program ...
Chang, J. F., Lan, C. Edward
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Aerodynamics of an airfoil with a jet issuing from its surface [PDF]
A simple, two dimensional, incompressible and inviscid model for the problem posed by a two dimensional wing with a jet issuing from its lower surface is considered and a parametric analysis is carried out to observe how the aerodynamic characteristics ...
Karamcheti, K., Tavella, D. A.
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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.
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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.
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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
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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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.
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CFD-enabled sustainable design and manufacturing of cooling fan for unmanned helicopter. [PDF]
Sci RepSi L +10 more
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Research on Design and Control Method of Flexible Wing Ribs with Chordwise Variable Camber. [PDF]
Biomimetics (Basel)Tao X, Bin L.
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