Analysis of the Aeroelastic Dynamics of Lightweight Flexible Variations of the SNL-NRT Turbine

Farrell, Alayna; Ponta, Fernando; Baruah, Apurva

doi:10.3390/applmech5020017

Title: Analysis of the Aeroelastic Dynamics of Lightweight Flexible Variations of the SNL-NRT Turbine

Journal Article · Sun Apr 14 00:00:00 EDT 2024 · Applied Mechanics

DOI:https://doi.org/10.3390/applmech5020017· OSTI ID:2337537

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Current trends show that wind turbines are growing in size to meet a rising demand for renewable energy generation, and their upscaled rotors have inherently become more flexible to maintain a proportionally lighter design. This is because larger rotors must be less massive relative to their diameter to minimize the levelized cost of energy (LCOE), which means that blades that are notably less stiff are produced as a result. These structural changes to blades are often reflected in their compromised aeroelastic stability and amplified deformation during operation, which has the potential to decrease the blade’s expected lifetime and the performance of the machine overall. Variations in blade flexibility are also known to influence vortex-wake structures downstream of the turbine, causing patterns of velocity deficit to evolve in ways that affect the performance of other turbines in the farm. This research explores how the increased flexibility of modern utility-scale wind turbine blades influences rotor aeroelastic behavior and interactions with farm flow. High-fidelity simulations of Sandia National Laboratories’ (SNL) National Rotor Testbed (NRT) wind turbine are presented. Flexible variations of the NRT baseline blade are simulated in a variety of realistic operational conditions typically expected at the SNL’s SWiFT facility in Lubbock, Texas. Solutions are then compared to investigate how specific changes to the structural properties of the NRT baseline blade’s design and construction can influence its aeroelastic response at the rotor and the evolution of the turbine’s wake.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: PO-2074866; PO-2159403

OSTI ID:: 2337537

Journal Information:: Applied Mechanics, Journal Name: Applied Mechanics Vol. 5 Journal Issue: 2; ISSN 2673-3161

Publisher:: MDPI AGCopyright Statement

Country of Publication:: Country unknown/Code not available

Language:: English

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