AeroDyn Theory Manual

AeroDyn is a set of routines used in conjunction with an aeroelastic simulation code to predict the aerodynamics of horizontal axis wind turbines. These subroutines provide several different models whose theoretical bases are described in this manual. AeroDyn contains two models for calculating the effect of wind turbine wakes: the blade element momentum theory and the generalized dynamic-wake theory. Blade element momentum theory is the classical standard used by many wind turbine designers and generalized dynamic wake theory is a more recent model useful for modeling skewed and unsteady wake dynamics. When using the blade element momentum theory, various corrections are available for the user, such as incorporating the aerodynamic effects of tip losses, hub losses, and skewed wakes. With the generalized dynamic wake, all of these effects are automatically included. Both of these methods are used to calculate the axial induced velocities from the wake in the rotor plane. The user also has the option of calculating the rotational induced velocity. In addition, AeroDyn contains an important model for dynamic stall based on the semi-empirical Beddoes-Leishman model. This model is particularly important for yawed wind turbines. Another aerodynamic model in AeroDyn is a tower shadow model based on potentialmore » flow around a cylinder and an expanding wake. Finally, AeroDyn has the ability to read several different formats of wind input, including single-point hub-height wind files or multiple-point turbulent winds.« less

[1]  B. Jonkman,et al.  TurbSim User's Guide , 2005 .

[2]  H. Ashley,et al.  Modeling of yawing and furling behavior of small wind turbines , 2000 .

[3]  D. C. Janetzke,et al.  Theoretical and experimental power from large horizontal-axis wind turbines , 1982 .

[4]  David A. Peters,et al.  Theoretical prediction of dynamic inflow derivatives , 1980 .

[5]  S.S. Venkata,et al.  Wind energy explained: Theory, Design, and application [Book Review] , 2003, IEEE Power and Energy Magazine.

[6]  A. C. Hansen,et al.  Yaw dynamics of horizontal axis wind turbines , 1992 .

[7]  Maureen Hand,et al.  Unsteady Aerodynamics Experiment Phase VI: Wind Tunnel Test Con gurations and Available Data Campaigns , 2001 .

[8]  A. Suzuki.  Application of dynamic inflow theory to wind turbine rotors , 2000 .

[9]  P. B. S. Lissaman,et al.  Applied Aerodynamics of Wind Power Machines , 1974, Renewable Energy.

[10]  Christian Bak,et al.  Influence from blade-tower interaction on fatigue loads and dynamics (poster) , 2001 .

[11]  M. L. Buhl,et al.  New Empirical Relationship between Thrust Coefficient and Induction Factor for the Turbulent Windmill State , 2005 .

[12]  S. Goldstein.  On the Vortex Theory of Screw Propellers , 1929 .

[13]  D. Peters,et al.  Correlation of Measured Induced Velocities with a Finite-State Wake Model , 1991 .

[14]  M. J. Hoffman,et al.  Effects of surface roughness and vortex generators on the NACA 4415 airfoil , 1995 .

[15]  J. G. Leishman,et al.  Modeling Sweep Effects on Dynamic Stall , 1989 .

[16]  J. G. Leishman,et al.  A Semi-Empirical Model for Dynamic Stall , 1989 .

[17]  H. Glauert.  A GENERAL THEORY OF THE AUTOGYRO , 2022 .

[18]  J G Schepers,et al.  Joint investigation of dynamic inflow effects and implementation of an engineering method , 1995 .

[19]  L. Trilling,et al.  Incompressible Aerodynamics , 1961, Nature.

[20]  R. P. Coleman,et al.  Evaluation of the Induced-Velocity Field of an Idealized Helicopter Rotor , 1945 .

[21]  J. Gordon Leishman,et al.  Principles of Helicopter Aerodynamics , 2000 .

[22]  Ervin Bossanyi,et al.  Wind Energy Handbook , 2001 .

[23]  A. C. Hansen.  Yaw dynamics of horizontal axis wind turbines. Final report , 1992 .

[24]  James L. Tangler.  The Nebulous Art of Using Wind-Tunnel Airfoil Data for Predicting Rotor Performance , 2002 .

[25]  A. Hansen,et al.  Aerodynamics of Horizontal-Axis Wind Turbines , 1993 .

[26]  M. J. Hoffman,et al.  Effects of grit roughness and pitch oscillations on the S809 airfoil , 1995 .

[27]  M. Selig,et al.  A 3-D stall-delay model for horizontal axis wind turbine performance prediction , 1998 .

[28]  W. Kinner,et al.  Die kreisförmige Tragfläche auf potentialtheoretischer Grundlage , 1937 .

[29]  Lakshmi N. Sankar,et al.  APPLICATION OF A VISCOUS FLOW METHODOLOGY TO THE NREL PHASE VI ROTOR , 2002 .

[30]  E. M. Patton,et al.  Design analysis of performance and aerodynamic loading of non-flexible horizontal-axis wind turbines , 1978 .

[31]  William H. Press,et al.  Numerical Recipes: FORTRAN , 1988 .

[32]  David J. Laino,et al.  Current Efforts Toward Improved Aerodynamic Modeling Using the AeroDyn Subroutines , 2004 .

[33]  Nicholas Jenkins,et al.  Aerodynamics of horizontal axis wind turbines , 2002, Wind Energy Handbook 3e.

[34]  H. Reissner,et al.  On the Vortex Theory of the Screw Propeller , 1937 .

[35]  S. Powles.  The effects of tower shadow on the dynamics of a horizontal-axis witn turbine , 1983 .

[36]  Maureen Hand,et al.  NREL Unsteady Aerodynamics Experiment in the NASA-Ames Wind Tunnel: A Comparison of Predictions to Measurements , 2001 .

[37]  Chengjian He.  Development and application of a generalized dynamic wake theory for lifting rotors , 1989 .