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A fluid solver for studying torsional galloping in solar-tracking PV panel arrays / Ethan Young, [and three others].
- Format:
- Book
- Government document
- Author/Creator:
- Young, Ethan, (Research scientist), author.
- Series:
- NREL/PR ; 2C00-78203.
- NREL/PR ; 2C00-78203
- Language:
- English
- Subjects (All):
- Solar panels--Stability.
- Solar panels.
- Photovoltaic power generation--United States.
- Photovoltaic power generation.
- Fluid-structure interaction.
- Strains and stresses.
- Physical Description:
- 1 online resource (22 pages) : color illustrations.
- Other Title:
- Fluid solver for studying torsional galloping in solar-tracking photovoltaic panel arrays
- Place of Publication:
- [Golden, CO] : National Renewable Energy Laboratory, 2020.
- Summary:
- Solar-tracking photovoltaic arrays are susceptible to aeroelastic fluttering during high-wind events. This dynamic fluttering behavior can grow in amplitude until the panels enter an unstable mode known as torsional galloping which can lead to panel failure or total array destruction. To better understand the physics of the torsional galloping phenomenon, and to inform the discussion around panel design and recommended panel stow positions during high wind events, a fluid-structure interaction solver composed of a simulated atmospheric boundary layer with simplified panel structural responses was designed. The simulation choices and features of this solver were informed by the geometry and physical properties of an experimental panel array known to exhibit torsional galloping behavior during hind-wind events. These simulations revealed that the torsional galloping instability is driven by a combination of cyclic vortex shedding from the sun-facing side of the panel and the elastic properties of the torque tube linking the panel assemblies. Testing different stow angles across a range of wind speeds indicates that panels are generally more stable when stowed at negative angles where the leading edge is closer to the ground, hypothesized to be due to ground-blocking effects.
- Notes:
- In scope of the U.S. Government Publishing Office Cataloging and Indexing Program (C&I) and Federal Depository Library Program (FDLP).
- "DuraMat webinar, October 12, 2020."
- "NREL/PR-2C00-78203"--Page 21.
- Description based on online resource, PDF version; title from cover (NREL, viewed January 2, 2025).
- OCLC:
- 1407175246
- Publisher Number:
- 1721741 OSTI ID
- Access Restriction:
- Publicly released
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