Reverse Engineering of a Wind Turbine Blade Surface using Differential Evolution

2015 ◽  
Author(s):  
G.A. Strofylas ◽  
I.K. Nikolos
Keyword(s):  
Differential Evolution ◽  
Reverse Engineering ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Blade Surface

scholarly journals Differential evolution algorithm for performance optimization of the micro plasma actuator as a microelectromechanical system

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Javad Omidi ◽  
Karim Mazaheri
Keyword(s):  
Differential Evolution ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Performance Optimization ◽  
Stokes Equations ◽  
Differential Evolution Algorithm ◽  
Aerodynamic Performance ◽  
Wind Turbine Blade ◽  
Electrostatic Model ◽  
Dielectric Thickness

Abstract Dielectric Discharge Barrier (DBD) plasma actuators are considered as one of the best active electro-hydrodynamic control devices, and are considered by many contemporary researchers. Here a simple electrostatic model, which is improved by authors, and uses the Maxwell’s and the Navier–Stokes equations, is proposed for massive optimization computations. This model is used to find the optimum solution for application of a dielectric discharge barrier on a curved surface of a DU25 wind turbine blade airfoil, in a range of 5–18 kV applied voltages, and 0.5 to 13 kHz frequency range. Design variables are selected as the dielectric thickness and material, and thickness and length of the electrodes, and the applied voltage and frequency. The aerodynamic performance, i.e. the lift to drag ratio of the wind turbine blade section is considered as the cost function. A differential evolution optimization algorithm is applied and we have simultaneously found the optimized value of both geometrical and operational parameters. Finally the optimized value at each voltage and frequency are sought, and the optimum aerodynamic performance is derived. The physical effect of each design variable on the aerodynamic performance is discussed. A design relation is proposed to recommend an optimum design for wind turbine applications.

Research on Wind Turbine Blade Surface Damage Fault On-Line Monitoring and Diagnosis System

2013 ◽  
Author(s):  
Yongxin Feng ◽  
Tao Yang ◽  
Xiaowen Deng ◽  
Qingshui Gao ◽  
Chu Zhang ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Farm ◽  
Turbine Blades ◽  
Surface Damage ◽  
Wind Turbine Blade ◽  
Offshore Wind ◽  
Blade Surface ◽  
Diagnosis System ◽  
On Line

The basic fault types of wind turbine blades are introduced, a novel blade surface damage detection method based on machine vision is being suggested. The network of wind turbine blade surface damage fault on-line monitoring and fault diagnosis system has already been developed. The system architecture, software modules and functions are described, and given application example illustrates the usefulness and effectiveness of this system. The result shows that this system can monitor the surface damage failure of the blade in real time, and can effectively reduce the blade’s maintenance costs for wind farms, especially offshore wind farm.

Performance Investigation of Non-Linear Insulator against Surface Tracking on Wind Turbine Blade Surface

2014 ◽  
Vol 911 ◽  
pp. 190-194
Author(s):  
Watthanapong Sasimma ◽  
Amnart Suksri
Keyword(s):  
Zinc Oxide ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Saline Solution ◽  
Research Work ◽  
Aluminium Oxide ◽  
Wind Turbine Blade ◽  
Blade Surface ◽  
Surface Tracking ◽  
Modified Epoxy

This research work investigates the surface degradation of wind turbine blade surface insulator which is made from modified epoxy resin mixed with Zinc oxide (ZnO) and Aluminium oxide (Al2O3) in different percentage as a filler elements. Accelerated test with AC voltage of 4.5 kV 50 Hz with NH4Cl saline solution using flow rate of contaminant equals to 0.6 ml/min according to IEC 60587 standard. It was found that, the solid insulators which has 30 % of Zinc oxide (ZnO) and 20% of Aluminium oxide (Al2O3) fillers prolong the process of surface tracking to the order of 5.41 for Zinc oxide (ZnO) filler and also to the order of 30.68 for Aluminium oxide (Al2O3) filler. On the other hand, if the amount of Aluminium oxide (Al2O3) filler is more than 20% by weight, it will lead to a rapid tracking phenomena.

scholarly journals Design and Analysis of Dimple Arrangement on a Small Wind Turbine Blade

2019 ◽  
Vol 9 (2) ◽  
pp. 3552-3557
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Aerodynamic Performance ◽  
Wind Turbine Blade ◽  
Performance Estimation ◽  
Cfd Analysis ◽  
Blade Surface ◽  
Ansys Fluent ◽  
Small Wind Turbine ◽  
Overall Performance

This article predominantly focuses on the performance estimation of a small wind turbine blade when a dimple arrangement is made along its upper surface. The dimple arrangement is grooved at two locations: 0.25c and 0.5c, where c is the chord length of the turbine blade. A CFD analysis using the k-ε turbulence model is carried out on the selected blade sections NREL S823 and S822. The continuity and momentum equations are solved using ANSYS Fluent Solver to assess the aerodynamic performance of the proposed design. The effect of introducing a dimple on the blade surface has shown to delay the flow separation, with the formation of vortices. Further, the overall performance of the blade is simulated using GH BLADED and the results acquired are discussed.

scholarly journals Defect Monitoring of a Wind Turbine Blade Surface by using Surface Wave Damping

2017 ◽  
Vol 23 (1) ◽  
pp. 90-94
Author(s):  
Kyung-Hwan Kim ◽  
Young-Jin Yang ◽  
Hyun-Bum Kim ◽  
Hyung-Chan Yang ◽  
Jong-Hwan Lim ◽  
...  
Keyword(s):  
Surface Wave ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Turbine Blade ◽  
Blade Surface ◽  
Wave Damping

The Study of the Aerodynamic Force of Wind Turbine Blade by Using FLUENT and MATLAB

2011 ◽  
Vol 225-226 ◽  
pp. 794-797
Author(s):  
He Huang ◽  
Sheng Jun Wu ◽  
Zhuo Qiu Li ◽  
Jin Fan Fei
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Cross Section ◽  
Large Scale ◽  
Aerodynamic Force ◽  
Wind Turbine Blade ◽  
Wind Pressure ◽  
Solid Model ◽  
Blade Surface ◽  
Analytical Work

In this paper, large scale wind turbine blade has been taken for example and two harmful conditions have been chosen as the study targets. Taking a 25 m long wind turbine blade, its solid model is built in CAE. Then take advantage of Computational Fluid Dynamics software-FLUENT to analyze and simulate wind pressure of blade surface acted by aerodynamic force. By means of the numerical method to make curve fitting to bring wind pressure to bear on each cross section of blade accurately, and import it into ANSYS to do further analytical work. It shows that the work should be the firm foundation for further analysis of the wind turbine blade.

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