Results 21 to 30 of about 21,521 (207)

DESIGN OPTIMIZATION OF TRANSONIC AIRFOILS [PDF]

Engineering Optimization, 1993
Numerical optimization procedures have been considered for the design of airfoils in transonic flow based on the transonic small-disturbance (TSD) and Euler equations. A sequential approximation optimization technique was implemented with an accurate approximation of the wave drag based on Nixon's coordinate straining approach.
C.-Y. JOH, B. GROSSMAN, R.T. HAFTKA
openaire   +1 more source

Integral Airfoil Generation of Multi-rotor Aircraft Based on Optimization of Upper Wing Contour and CFD Simulation [PDF]

Journal of Applied Fluid Mechanics
Regarding the airfoil optimization design of multi-rotor unmanned aerial vehicles, this paper proposes an integral airfoil design method based on upper airfoil contour optimization. Firstly, by designing concave descent input curves with 0-1 distribution,
Z. Wang, Y. Zhu, Q. Yuan, W. B. Gu, X. B. Xie   +4 more
doaj   +1 more source

Using genetic algorithms to optimize airfoils in incompressible regime [PDF]

INCAS Bulletin, 2019
Aerodynamic optimization is a very actual problem in aircraft design and airfoils are basic two-dimensional shape forming cross sections of wings. Traditionally, the airfoil geometry if defined by a very large number of coordinates. Nowadays, in order to
Adrian DINA, Sterian DANAILA, Mihai-Victor PRICOP, Ionut BUNESCU   +3 more
doaj   +1 more source

CFD Analysis and Shape Optimization of Airfoils Using Class Shape Transformation and Genetic Algorithm—Part I

Applied Sciences, 2021
This paper presents the parameterization and optimization of two well-known airfoils. The aerodynamic shape optimization investigation includes the subsonic (NREL S-821) and transonic airfoils (RAE-2822).
Md Tausif Akram, Man-Hoe Kim
doaj   +1 more source

Multi-objective optimization of printed circuit heat exchanger with airfoil fins based on the improved PSO-BP neural network and the NSGA-II algorithm

Nuclear Engineering and Technology, 2023
The printed circuit heat exchanger (PCHE) with airfoil fins has the benefits of high compactness, high efficiency and superior heat transfer performance.
Jiabing Wang, Linlang Zeng, Kun Yang
doaj   +1 more source

State of the Art in the Optimisation of Wind Turbine Performance Using CFD [PDF]

, 2019
Wind energy has received increasing attention in recent years due to its sustainability and geographically wide availability. The efficiency of wind energy utilisation highly depends on the performance of wind turbines, which convert the kinetic energy ...
Haghnegahdar, Mohammad Amin, Kolios, Athanasios, Lander, Martin, Mussetta, Marco, Shourangiz-Haghighi, Alireza, Wang, Lin   +5 more
core   +1 more source

Aeroacoustic airfoil shape optimization enhanced by autoencoders

Expert Systems with Applications, 2022
We present a framework for airfoil shape optimization to reduce the trailing edge noise for the design of wind turbine blades. Far-field noise is evaluated using Amiet's theory coupled with the TNO-Blake model to calculate the wall pressure spectrum and fast turn-around XFOIL simulations to evaluate the boundary layer parameters.
Kou, Jiaqing, Botero-Bolívar, Laura, Ballano, Román, Marino, Oscar, de Santana, Leandro, Valero, Eusebio, Ferrer, Esteban   +6 more
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Airfoil Blender for Blade Optimizations

Journal of Physics: Conference Series, 2018
An airfoil database was developed in the present work. The database includes a multivariate, unstructured grid, Radial Basis Function (RBF), optimization-compatible interpolator for airfoil aerodynamic coefficients. The database was designed to aid complex blade design optimizations carried out in a novel optimization framework, HAWTOpt2, being ...
Skrzypiński, Witold, McWilliam, Michael, Zahle, Frederik   +2 more
openaire   +3 more sources

Airfoil Optimization of Tiltrotor Aircraft Forward Flight Mode Based on Isight

Hangkong gongcheng jinzhan, 2019
As one of the main development trends of the next generation rotor-crafts, it is of important significance to study the aerodynamic optimization design of its wings for improving the flight performance of tiltrotor aircraft.NACA2412 is employed as the ...
Zhao Guang, He Guoyi, Wang Qi, Luo Yun, Wang Zhen   +4 more
doaj   +1 more source

Optimal airfoil’s shapes by high fidelity CFD [PDF]

Aircraft Engineering and Aerospace Technology, 2018
Purpose There is an increasing interest in airfoils that modify their shape to adapt at the flow conditions. As an example of application, the authors search the optimal 4-digit NACA airfoil that maximizes the lift-over-drag ratio for a constant lift coefficient of 0.6, from Re = 104 to 3 × 106.
Viola, Ignazio Maria, Chapin, Vincent, Speranza, Nicola, Biancolini, Marco Evangelos   +3 more
openaire   +5 more sources