This paper presents an integrated method for designing airfoil families of large wind turbine blades. For a given rotor diameter and tip speed ratio, the optimal airfoils are designed based on the local speed ratios. To achieve high power performance at low cost, the airfoils are designed with an objective of high Cp and small chord length. When the airfoils are obtained, the optimum flow angle...

Optimizing the NACA0015 airfoil which is widely applied in small-scale vertical axis wind turbine to make it has a better aerodynamic performance. In the optimization process, using CST parameterization method to perturb the airfoil geometry, the thickness and camber of the airfoil are selected as the constraint, and the value of the maximum tangential force coefficient is chosen as the objecti...

We present computations of membrane airfoil behavior subject to aerodynamic loading and compare them with in vivo measurements of membrane wings of bats during flight. The computational method assumes an inviscid potential flow (with net circulation determined by a Kutta condition), is computed using XFOIL and iteratively coupled with a finite element model describing the membrane behavior. We ...

In this study, three types of aerofoils were examined at various angles attack and a steady value then fluctuated air flow. Then, the findings compared to XFOIL prediction results. The experimental simulation results consistent some extent with shape chosen was modified by making slot through blade aerofoil studying their effect on aerodynamics shape. slotted studied as it faced wind revealed t...

Abstract A method of Sequential Log-Convex Programming (SLCP) is constructed that exploits the log-convex structure present in many engineering design problems. The mathematical Geometric (GP) combined with ability Quadratic Program (SQP) to accommodate a wide range objective and constraint functions, resulting practical algorithm can be adopted little no modification existing practices. Three ...

Abstract For the design of wind turbines, airfoil optimization is widely required as operation efficiency turbines closely dependent on aerodynamic performance, where accuracy method great importance. In this paper, a machine learning-based algorithm proposed to improve performance. A low-speed NACA0012 selected original for optimization. The class-shape-transformation (CST) used construct geom...

Abstract This paper compares several blade element theory (BET) method-based propeller simulation tools, including an evaluation against static ground tests and high-fidelity Reynolds-Average Navier Stokes (RANS) simulations. Two proprietary geometries for paraglider applications are analysed in flight conditions. The RANS simulations validated with the test data used as a reference comparing B...

This work presents an aerodynamic optimization method for a Droop Nose Leading Edge (DNLE) and Morphing Trailing (MTE) of UAS-S45 root airfoil by using Bezier-PARSEC parameterization. The is performed hybrid technique based on Particle Swarm Optimization (PSO) algorithm combined with Pattern Search algorithm. needed to provide efficient exploitation the potential configurations obtained PSO dra...

This paper presents the parameterization and optimization of two well-known airfoils. The aerodynamic shape investigation includes subsonic (NREL S-821) transonic airfoils (RAE-2822). class transformation is employed for parametrization while genetic algorithm used purposes. absolute scheme process carried out minimization drag coefficient maximization lift to ratio. In-house MATLAB code incorp...

The article presents a synthesis of an optimization algorithm for aerodynamic characteristics sailplane in preliminary design phase aimed at increasing average cross-country speed. flight data SZD-48-3 standard class FAI glider was collected and analyzed from weglide.org portal as track files, saved igc format. general structure atmosphere during basing on statistics. New integral criterion the...