Structural Design of a Horizontal-Axis Tidal Current Turbine Composite Blade
This paper describes the structural design of a tidal composite blade. The structural design is preceded by two steps: hydrodynamic design and determination of extreme loads. The hydrodynamic design provides the chord and twist distributions along the blade length that result in optimal performance...
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National Renewable Energy Laboratory (U.S.)
2011
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ftunivnotexas:info:ark/67531/metadc840356 2023-05-15T14:24:40+02:00 Structural Design of a Horizontal-Axis Tidal Current Turbine Composite Blade Bir, G. S. Lawson, M. J. Li, Y. Wind and Hydropower Technologies Program (U.S.) 2011-10-01 14 p. Text https://digital.library.unt.edu/ark:/67531/metadc840356/ English eng National Renewable Energy Laboratory (U.S.) rep-no: NREL/CP-5000-50658 grantno: AC36-08GO28308 osti: 1028041 https://digital.library.unt.edu/ark:/67531/metadc840356/ ark: ark:/67531/metadc840356 Presented at the ASME 30th International Conference on Ocean, Offshore, and Arctic Engineering, 19-24 June 2011, Rotterdam, The Netherlands Specifications Hydrodynamics Fabrication Fluid Mechanics Ultimate Strength Marine Hydrokinetic Technology Geometry Ocean Energy Turbines Tidal Turbine 13 Hydro Energy 17 Wind Energy Water Power Computerized Simulation Marine Hydrokinetic Technology Torsion Shape Stability Airfoils Design Lifetime Thickness Shear Performance Flexibility Article 2011 ftunivnotexas 2017-04-08T22:07:58Z This paper describes the structural design of a tidal composite blade. The structural design is preceded by two steps: hydrodynamic design and determination of extreme loads. The hydrodynamic design provides the chord and twist distributions along the blade length that result in optimal performance of the tidal turbine over its lifetime. The extreme loads, i.e. the extreme flap and edgewise loads that the blade would likely encounter over its lifetime, are associated with extreme tidal flow conditions and are obtained using a computational fluid dynamics (CFD) software. Given the blade external shape and the extreme loads, we use a laminate-theory-based structural design to determine the optimal layout of composite laminas such that the ultimate-strength and buckling-resistance criteria are satisfied at all points in the blade. The structural design approach allows for arbitrary specification of the chord, twist, and airfoil geometry along the blade and an arbitrary number of shear webs. In addition, certain fabrication criteria are imposed, for example, each composite laminate must be an integral multiple of its constituent ply thickness. In the present effort, the structural design uses only static extreme loads; dynamic-loads-based fatigue design will be addressed in the future. Following the blade design, we compute the distributed structural properties, i.e. flap stiffness, edgewise stiffness, torsion stiffness, mass, moments of inertia, elastic-axis offset, and center-of-mass offset along the blade. Such properties are required by hydro-elastic codes to model the tidal current turbine and to perform modal, stability, loads, and response analyses. Article in Journal/Newspaper Arctic University of North Texas: UNT Digital Library |
institution |
Open Polar |
collection |
University of North Texas: UNT Digital Library |
op_collection_id |
ftunivnotexas |
language |
English |
topic |
Specifications Hydrodynamics Fabrication Fluid Mechanics Ultimate Strength Marine Hydrokinetic Technology Geometry Ocean Energy Turbines Tidal Turbine 13 Hydro Energy 17 Wind Energy Water Power Computerized Simulation Marine Hydrokinetic Technology Torsion Shape Stability Airfoils Design Lifetime Thickness Shear Performance Flexibility |
spellingShingle |
Specifications Hydrodynamics Fabrication Fluid Mechanics Ultimate Strength Marine Hydrokinetic Technology Geometry Ocean Energy Turbines Tidal Turbine 13 Hydro Energy 17 Wind Energy Water Power Computerized Simulation Marine Hydrokinetic Technology Torsion Shape Stability Airfoils Design Lifetime Thickness Shear Performance Flexibility Bir, G. S. Lawson, M. J. Li, Y. Structural Design of a Horizontal-Axis Tidal Current Turbine Composite Blade |
topic_facet |
Specifications Hydrodynamics Fabrication Fluid Mechanics Ultimate Strength Marine Hydrokinetic Technology Geometry Ocean Energy Turbines Tidal Turbine 13 Hydro Energy 17 Wind Energy Water Power Computerized Simulation Marine Hydrokinetic Technology Torsion Shape Stability Airfoils Design Lifetime Thickness Shear Performance Flexibility |
description |
This paper describes the structural design of a tidal composite blade. The structural design is preceded by two steps: hydrodynamic design and determination of extreme loads. The hydrodynamic design provides the chord and twist distributions along the blade length that result in optimal performance of the tidal turbine over its lifetime. The extreme loads, i.e. the extreme flap and edgewise loads that the blade would likely encounter over its lifetime, are associated with extreme tidal flow conditions and are obtained using a computational fluid dynamics (CFD) software. Given the blade external shape and the extreme loads, we use a laminate-theory-based structural design to determine the optimal layout of composite laminas such that the ultimate-strength and buckling-resistance criteria are satisfied at all points in the blade. The structural design approach allows for arbitrary specification of the chord, twist, and airfoil geometry along the blade and an arbitrary number of shear webs. In addition, certain fabrication criteria are imposed, for example, each composite laminate must be an integral multiple of its constituent ply thickness. In the present effort, the structural design uses only static extreme loads; dynamic-loads-based fatigue design will be addressed in the future. Following the blade design, we compute the distributed structural properties, i.e. flap stiffness, edgewise stiffness, torsion stiffness, mass, moments of inertia, elastic-axis offset, and center-of-mass offset along the blade. Such properties are required by hydro-elastic codes to model the tidal current turbine and to perform modal, stability, loads, and response analyses. |
author2 |
Wind and Hydropower Technologies Program (U.S.) |
format |
Article in Journal/Newspaper |
author |
Bir, G. S. Lawson, M. J. Li, Y. |
author_facet |
Bir, G. S. Lawson, M. J. Li, Y. |
author_sort |
Bir, G. S. |
title |
Structural Design of a Horizontal-Axis Tidal Current Turbine Composite Blade |
title_short |
Structural Design of a Horizontal-Axis Tidal Current Turbine Composite Blade |
title_full |
Structural Design of a Horizontal-Axis Tidal Current Turbine Composite Blade |
title_fullStr |
Structural Design of a Horizontal-Axis Tidal Current Turbine Composite Blade |
title_full_unstemmed |
Structural Design of a Horizontal-Axis Tidal Current Turbine Composite Blade |
title_sort |
structural design of a horizontal-axis tidal current turbine composite blade |
publisher |
National Renewable Energy Laboratory (U.S.) |
publishDate |
2011 |
url |
https://digital.library.unt.edu/ark:/67531/metadc840356/ |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Presented at the ASME 30th International Conference on Ocean, Offshore, and Arctic Engineering, 19-24 June 2011, Rotterdam, The Netherlands |
op_relation |
rep-no: NREL/CP-5000-50658 grantno: AC36-08GO28308 osti: 1028041 https://digital.library.unt.edu/ark:/67531/metadc840356/ ark: ark:/67531/metadc840356 |
_version_ |
1766297111897309184 |