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Title: A Vortex Step Method for Nonlinear Airfoil Polar Data as Implemented in KiteAeroDyn

Abstract

This paper summarizes the underlying theory in the recently developed KiteAeroDyn (KiteAD) module, which is part of KiteFAST (KiteFAST), a numerical simulation tool that is currently being developed at the NREL. KiteFAST is intended for the simulation of airborne wind energy systems (e.g., energy kites). KiteAD implements an innovative vortex step method for the calculation of aerodynamic loads on all of the lifting surfaces of the kite, which is capable of accounting for two-dimensional viscous effects through the use of nonlinear airfoil polars. Considering nonlinear airfoil polar data allows for the modeling of flap or other moving-surface deflections, as well as for the modelling of inflow conditions with larger angles angles of attack. From preliminary verification against other existing codes that can solve for lift distribution on lifting surfaces, the results of the newly implemented method proved to be numerically robust and computationally inexpensive, thus ideal for aeroelastic design and analysis applications.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [2]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  2. Makani
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
Makani
OSTI Identifier:
1547240
Report Number(s):
NREL/CP-5000-74483
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at the AIAA SciTech 2019 Forum, 7-11 January 2019, San Diego, California
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; wind energy; modeling; simulation; FAST; airfoils

Citation Formats

Damiani, Rick R, Wendt, Fabian F, Jonkman, Jason, and Sicard, Jerome. A Vortex Step Method for Nonlinear Airfoil Polar Data as Implemented in KiteAeroDyn. United States: N. p., 2019. Web. doi:10.2514/6.2019-0804.
Damiani, Rick R, Wendt, Fabian F, Jonkman, Jason, & Sicard, Jerome. A Vortex Step Method for Nonlinear Airfoil Polar Data as Implemented in KiteAeroDyn. United States. doi:10.2514/6.2019-0804.
Damiani, Rick R, Wendt, Fabian F, Jonkman, Jason, and Sicard, Jerome. Sun . "A Vortex Step Method for Nonlinear Airfoil Polar Data as Implemented in KiteAeroDyn". United States. doi:10.2514/6.2019-0804.
@article{osti_1547240,
title = {A Vortex Step Method for Nonlinear Airfoil Polar Data as Implemented in KiteAeroDyn},
author = {Damiani, Rick R and Wendt, Fabian F and Jonkman, Jason and Sicard, Jerome},
abstractNote = {This paper summarizes the underlying theory in the recently developed KiteAeroDyn (KiteAD) module, which is part of KiteFAST (KiteFAST), a numerical simulation tool that is currently being developed at the NREL. KiteFAST is intended for the simulation of airborne wind energy systems (e.g., energy kites). KiteAD implements an innovative vortex step method for the calculation of aerodynamic loads on all of the lifting surfaces of the kite, which is capable of accounting for two-dimensional viscous effects through the use of nonlinear airfoil polars. Considering nonlinear airfoil polar data allows for the modeling of flap or other moving-surface deflections, as well as for the modelling of inflow conditions with larger angles angles of attack. From preliminary verification against other existing codes that can solve for lift distribution on lifting surfaces, the results of the newly implemented method proved to be numerically robust and computationally inexpensive, thus ideal for aeroelastic design and analysis applications.},
doi = {10.2514/6.2019-0804},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {1}
}

Conference:
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