Browsing North American Wind Energy Academy 2015 Symposium by Issue Date
Now showing items 1-20 of 82
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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. ... -
A game-theoretic framework to investigate the conditions for cooperation between energy storage operators and wind power producers
(Virginia Tech, 2015-06)Energy storage, has widely been accepted as a means to provide capacity firming service to renewable sources of energy due to its capability to quickly start and shut down and its ability to have flexible ramping rates. ... -
A Novel Rough Wall Boundary Condition for LES of high Reynolds Number Flows
(Virginia Tech, 2015-06)The interactions between rough surfaces and fluid flows play an important role in turbulence simulation. The understanding of roughness elements at the wall (i.e., buildings and terrain features) to aerodynamics flow is ... -
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 ... -
Integrating Real-World Case Studies into Wind Energy Graduate Education
(Virginia Tech, 2015-06)Wind power continues to grow rapidly as a fuel source for the electric power industry in the US. Recent data for 2014 show that wind power in Texas alone delivered in excess of 10 percent of the annual electrical energy ... -
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 ... -
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) -
An evaluation of power performance for a small wind turbine in turbulent wind regimes
(Virginia Tech, 2015-06) -
An Experimental Investigation on Surface Water Transport and Ice Accreting Process Pertinent to Wind Turbine Icing Phenomena
(Virginia Tech, 2015-06)Wind turbine icing represents the most significant threat to the integrity of wind turbines in cold weather. Ice accretion on turbine blades would decrease power production of the wind turbines significantly. Ice accretion ... -
Structural modelling of blades for small wind turbines
(Virginia Tech, 2015-06)Small wind turbines are defined as having a power output and rotor diameter less than 50 kW and 16 m respectively. Turbines of this class are typically used to provide off-grid generation and can be sited in locations which ... -
Understanding Model Uncertainty – An Application of Uncertainty Quantification to Wind Energy
(Virginia Tech, 2015-06)Wind resource characterization and short-term wind power forecasts often utilize mesoscale meteorological models such as the Weather Research and Forecasting (WRF) model. Because of the finite nature of the model grid, ... -
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 ... -
Design and Development of an Integrated Avian and Bat Collision Detection System for Wind Turbines
(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 ... -
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 ... -
Wind Turbine Tower Fairing Geometries to Decrease Shadow Effects
(Virginia Tech, 2015-06)Tower fairings are a promising method to reduce wake for down wind turbines, with the drawback that the performance may be lost at high angles of attack. For example, the E863 airfoil has a much smaller wake than a cylinder ... -
Windtelligence: The Development of a Wind Farm Performance Management System
(Virginia Tech, 2015-06) -
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 ...
