Results 101 to 110 of about 21,521 (207)

ACCELERATED AIRFOIL OPTIMIZATION VIA VIBRATIONAL GENETIC ALGORITHM

open access: yesHavacılık ve Uzay Teknolojileri Dergisi, 2003
Transonic airfoil optimization is made for drag minimisation through shock wave reduction. In this study, a new approach to genetic algorithms, called Vibrational Genetic Algorithm (VGA), is used for transonic airfoil optimization.
Abdurrahman Hacıoğlu, İbrahim Özkol
doaj  

Development of a Knowledge-Based Optimization Method for Aerodynamic Design [PDF]

open access: yes
A new aerodynamic design method, CODISC, has been developed that combines an existing knowledgebased design method, CDISC, with a simple optimization module known as SOUP.
Campbell, Richard L., Lynde, Michelle N.
core   +1 more source

Two-dimensional wind-tunnel tests of a NASA supercritical airfoil with various high-lift systems. Volume 1: Data analysis [PDF]

open access: yes
High-lift systems for a NASA, 9.3%, method for calculating the viscous flow about two-dimensional multicomponent airfoils was evaluated by comparing its predictions with test data.
Mahal, A., Omar, E., Zierten, T.
core   +1 more source

Low speed propellers: Impact of advanced technologies [PDF]

open access: yes, 1980
Sensitivity studies performed to evaluate the potential of several advanced technological elements on propeller performance, noise, weight, and cost for general aviation aircraft are discussed.
Keiter, I. D.
core   +1 more source

Airfoil optimization with efficient gradient calculations [PDF]

open access: yes
The viscous airfoil design analysis code XFOIL was extended to allow optimization using conformal mapping coefficients as design variables. The optimization technique used was the Steepest Descent method applied to a Penalty Function.
Sorensen, Thomas
core   +1 more source

Wave Drag Reduction of SC(2)0410 Airfoil using New Developed Inviscid Compressible Adjoint Method

open access: yesJournal of Applied Fluid Mechanics, 2020
A supercritical airfoil is geometrically optimized using the new developed adjoint compressible lattice Boltzmann method. Minimizing the drag coefficient and eliminating the shock wave on the supercritical airfoil surface are considered as the cost ...
R. Kamali-Moghadam   +2 more
doaj  

Optimization of Long-Endurance Airfoils [PDF]

open access: yes21st AIAA Applied Aerodynamics Conference, 2003
Jun Hua   +3 more
openaire   +1 more source

Optimization of Low Reynolds Number Airfoils for Martian Rotor Applications Using an Evolutionary Algorithm [PDF]

open access: yes
The Mars Helicopter (MH) will be flying on the NASA Mars 2020 rover mission scheduled to launch in July of 2020. Research is being performed at the Jet Propulsion Laboratory (JPL) and NASA Ames Research Center to extend the current capabilities and ...
Johnson, Wayne R.   +2 more
core   +1 more source

Transonic airfoil design for helicopter rotor applications [PDF]

open access: yes
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.
core   +1 more source

Aerodynamics of an airfoil with a jet issuing from its surface [PDF]

open access: yes
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.
core   +1 more source

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