Browsing North American Wind Energy Academy 2015 Symposium by Title
Now showing items 1-20 of 82
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Academic Qualification in Onshore and Offshore Wind Energy within the Framework of the European Academy of Wind Energy and the European Wind Energy Master Program - Examples and Experiences in Germany and Europe
(Virginia Tech, 2015-06-10)The development of research and education in wind energy in Europe varies greatly between the member states. Building on these national achievements the European Academy of Wind Energy (EAWE) is integrating and connecting ... -
Aerodynamic Effects of Painted Surface Roughness on Wind Turbine Blade Performance
(Virginia Tech, 2015-06-09)This paper briefly examines the aerodynamic effects of typical wind turbine blade roughness by investigating an appropriate scaling criteria which best relates the roughness configuration to the resulting changes in ... -
Aerodynamic Validation of Wind Turbine Airfoil Models in the Virginia Tech Stability Wind Tunnel
(Virginia Tech, 2015-06-09) -
Aerodynamics and Aeroacoustics of Spanwise Wavy Trailing Edge Flatback Airfoils: Design Improvement
(Virginia Tech, 2015-06)The spanwise wavy trailing edge design considering its structural benefits was proposed and studied. The three dimensional RANS-LES simulation has been performed to reveal the aerodynamic and aeroacoustic behaviors of the ... -
Analysis of Tower Shadow Effects on the UAE Rotor Blades
(Virginia Tech, 2015-06)A leading obstacle hindering the development of wind turbines to extreme scale is the structural integrity of the blades. Downwind rotors have been shown to give structural advantages for larger systems. However, there is ... -
Analysis of Turbine Wake Characteristics using Proper Orthogonal Decomposition and Triple Decomposition Methods
(Virginia Tech, 2015-06)In the present study, we report the progress made in our efforts to examine the wake flow characteristics behind a commonly-used three-bladed horizontal-axis wind turbine. A series of experiments were performed in a ... -
An Analytical Procedure for Evaluating Aerodynamics of Wind Turbines in Yawed Flow
(Virginia Tech, 2015-06)A new analytical method for evaluating the performance of wind turbines in yawed flow is presented. The method, based on momentum theory, relates the yaw angle to the tip-path-plane orientation of the turbine rotor and the ... -
Analytical Unsteady aerodynamics model of a Horizontal axis wind turbines due to linear change in wind speed
(Virginia Tech, 2015-06)Small wind turbines use MPPT (Maximum power point Tracking) algorithm that depends on the performance relation developed using a steady BEM [Blade Element Momentum] code. However, small wind turbines work under harsh ... -
Application of Fast Pressure-Sensitive Paint to an Oscillating Wind Turbine Airfoil
(Virginia Tech, 2015-06)In the unsteady flow environment experienced by wind turbine blades, large excursions in local angle of attack and significant three-dimensional flows arise that complicate the prediction of stall onset and unsteady loading. ... -
Assessing the Structural Impact of Low Level Jets over Wind Turbines
(Virginia Tech, 2015-06)Low Level Jets (LLJs) are defined as regions of relatively strong winds in the lower part of the atmosphere. They are a common feature over the Great Plains in the United States. It has been reported that 75 % of LLJs in ... -
Benefits of vertically-staggered wind turbines from theoretical analysis and Large-Eddy Simulations
(Virginia Tech, 2015-06) -
Bio-Inspired Trailing Edge Noise Control
(Virginia Tech, 2015-06)Trailing edge noise remains a primary limiting factor in the widespread implementation of wind turbines, particularly near populated areas. Noise regulations commonly require acoustic de-rating of existing turbines, leading ... -
CFD Analysis of NACA4415 Airfoil with ƴ – Re₀ Model considering Natural Transition
(Virginia Tech, 2015-06)Airfoil analysis is essential to wind turbine aerodynamics. In typical operating conditions, airfoils undergo transition from laminar to turbulent flow in the boundary layer in a manner that must be modeled accurately to ... -
Co-location of Wind and Solar Power Plants and Their Integration onto the US Power Grid
(Virginia Tech, 2015-06)A number of research and development groups and several renewable project operators have examined combining wind power production with on-site solar power production. Past research has been devoted to small, off-grid ... -
Combined Offshore Wind, Wave, Storage System Power and Cost Predictions
(Virginia Tech, 2015-06-08) -
Combining economic and fluid dynamic models to determine optimal spacing in very large wind-farms
(Virginia Tech, 2015-06)Now that wind-farms are becoming increasingly larger, the economics and physics of wind farms become intrinsically coupled and important when designing large wind farms. It is important to develop wind farm models in which ... -
Comparison of Offshore Wind Turbine Reliability
(Virginia Tech, 2015-06)The results of a comparative probabilistic reliability model applied to offshore wind turbine systems is presented. The model calculations are based on surrogate failure rate data from industrial onshore wind turbine ... -
Computational Modelling of Solidity Effects on Blade Elements with an Airfoil Profile for Wind Turbines
(Virginia Tech, 2015-06-08)The aim of this project is to investigate the aerodynamic performances of airfoil, especially NACA 4415, using the method of Computational Fluid Dynamics. The NACA 4415 was modeled and meshed in ICEM and then was simulated ... -
Convergence of Extreme Loads for Offshore Wind Turbine Support Structures
(Virginia Tech, 2015-06-11)Extreme loads of wind turbines are historically difficult to predict through simulation due to uncertainty in input conditions as well as in the simulation models. In addition, many long time series must be simulated for ...
