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Acoustic Tomography for Wind Energy

Principle Investigator developing sensing technology that reconstructs three-dimensional atmospheric wind and temperature fields from sound propagation

AWAKEN: American WAKE experimeNt

Co-Investigator and Lead Coordinator for large-scale wind energy field campaign producing 200+ TB of benchmark data across 12+ institutions

FLOWMAS: Exascale Computing for Floating Offshore Wind

$19M DOE Office of Science project developing algorithms for coupled fluid-structure-mooring dynamics at exascale

Two of the five Energy Earthshots projects NREL is involved in consider wind technology. Photo by Brent Rice, NREL

publications

Experimental study of turbine hub height variation on wind farms

Published in In: 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2013

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Recommended citation: Raul Cal, Matthew Melius, Nicholas Hamilton, Daniel Houck, "Experimental study of turbine hub height variation on wind farms." In: 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 2013.

Characteristic shapes of the normalized Reynolds stress anisotropy tensor in the wakes of wind turbines with counter-rotating rotors

Published in In: 17th international symposium on applications of laser techniques to fluid mechanics, 2014

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Recommended citation: NM Hamilton, RB Cal, "Characteristic shapes of the normalized Reynolds stress anisotropy tensor in the wakes of wind turbines with counter-rotating rotors." In: 17th international symposium on applications of laser techniques to fluid mechanics, 2014.

Characterization of Reynolds and deterministic stresses through phase-dependent measurements in the near wake of a wind turbine in an infinite turbine array

Published in In: APS Division of Fluid Dynamics Meeting Abstracts, 2014

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Recommended citation: Nicholas Hamilton, Murat Tutkun, Ra{\'u}l Cal, "Characterization of Reynolds and deterministic stresses through phase-dependent measurements in the near wake of a wind turbine in an infinite turbine array." In: APS Division of Fluid Dynamics Meeting Abstracts, 2014.

Development of a wind turbine wake in the infinite turbine array characterized via wall-normal-spanwise planes and cylindrical coordinates

Published in In: APS Division of Fluid Dynamics Meeting Abstracts, 2014

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Recommended citation: Ra{\'u}l Cal, Nicholas Hamilton, "Development of a wind turbine wake in the infinite turbine array characterized via wall-normal-spanwise planes and cylindrical coordinates." In: APS Division of Fluid Dynamics Meeting Abstracts, 2014.

Spacing dependence on wind turbine array boundary layers

Published in In: APS Division of Fluid Dynamics Meeting Abstracts, 2014

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Recommended citation: Raul Cal, Angelisse Ramos, Nicholas Hamilton, Dan Houck, "Spacing dependence on wind turbine array boundary layers." In: APS Division of Fluid Dynamics Meeting Abstracts, 2014.

Statistical development of wind turbine wakes for the fully developed wind turbine array boundary layer characterized via wall-normal-spanwise planes

Published in In: 19th Australasian Fluid Mechanics Conference, 2014

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Recommended citation: NM Hamilton, RB Cal, "Statistical development of wind turbine wakes for the fully developed wind turbine array boundary layer characterized via wall-normal-spanwise planes." In: 19th Australasian Fluid Mechanics Conference, 2014.

Towards a Wind Turbine Wake Reduced-Order Model

Published in In: APS Division of Fluid Dynamics Meeting Abstracts, 2017

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Recommended citation: Nicholas Hamilton, Bianca Viggiano, Marc Calaf, Murat Tutkun, Ra{\'u}l Cal, "Towards a Wind Turbine Wake Reduced-Order Model." In: APS Division of Fluid Dynamics Meeting Abstracts, 2017.

Acoustic tomography of turbulent flows near wind turbines

Published in Bulletin of the American Physical Society, 2018

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Recommended citation: Nicholas Hamilton, James Hansen, Julie Lundquist, Patrick Moriarty, Vladimir Ostashev, "Acoustic tomography of turbulent flows near wind turbines." Bulletin of the American Physical Society, 2018.

Validation of fast. farm against large-eddy simulations

Published in In: Journal of Physics: Conference Series, 2018

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Recommended citation: Jason Jonkman, Paula Doubrawa, Nicholas Hamilton, Jennifer Annoni, Paul Fleming, "Validation of fast. farm against large-eddy simulations." In: Journal of Physics: Conference Series, 2018.

Classification of the Reynolds stress anisotropy tensor in very large thermally stratified wind farms using colormap image segmentation

Published in Journal of Renewable and Sustainable Energy, 2019

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Recommended citation: Naseem Ali, Nicholas Hamilton, Marc Calaf, Ra{\'u}l Cal, "Classification of the Reynolds stress anisotropy tensor in very large thermally stratified wind farms using colormap image segmentation." Journal of Renewable and Sustainable Energy, 2019.

A new analytical wavelet-Gaussian wake model

Published in In: APS Division of Fluid Dynamics Meeting Abstracts, 2020

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Recommended citation: Zein Sadek, Raul Cal, Nicholas Hamilton, "A new analytical wavelet-Gaussian wake model." In: APS Division of Fluid Dynamics Meeting Abstracts, 2020.

Design and analysis of a spatially heterogeneous wake

Published in Wind Energy Science Discussions, 2020

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Recommended citation: Alayna Farrell, Jennifer King, Caroline Draxl, Rafael Mudafort, Nicholas Hamilton, Christopher Bay, Paul Fleming, Eric Simley, "Design and analysis of a spatially heterogeneous wake." Wind Energy Science Discussions, 2020.

Longitudinal coherence and short-term wind speed prediction based on a nacelle-mounted Doppler lidar

Published in In: Journal of Physics: Conference Series, 2020

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Recommended citation: Mithu Debnath, P Brugger, Eric Simley, Paula Doubrawa, Nicholas Hamilton, Andrew Scholbrock, David Jager, Mark Murphy, Jason Roadman, Julie Lundquist, others, "Longitudinal coherence and short-term wind speed prediction based on a nacelle-mounted Doppler lidar." In: Journal of Physics: Conference Series, 2020.

Overview of FLORIS updates

Published in In: Journal of Physics: Conference Series, 2020

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Recommended citation: Paul Fleming, Jennifer King, Christopher Bay, Eric Simley, Rafael Mudafort, Nicholas Hamilton, Alayna Farrell, Luis Martinez-Tossas, "Overview of FLORIS updates." In: Journal of Physics: Conference Series, 2020.

A Modal Description of Dynamic Wake Meandering

Published in In the proceedings of APS Division of Fluid Dynamics Meeting Abstracts, 2021

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Recommended citation: Nicholas Hamilton, Paula Doubrawa, Mithu Debnath, Peter Brugger, Fernando Port{\'e}-Agel, "A Modal Description of Dynamic Wake Meandering." In the proceedings of APS Division of Fluid Dynamics Meeting Abstracts, 2021.

Downstream Evolution of Eddy Viscosity in the Wake of a Wind Turbine

Published in In the proceedings of APS Division of Fluid Dynamics Meeting Abstracts, 2021

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Recommended citation: Ryan Scott, Luis Martinez-Tossas, Nicholas Hamilton, Ra{\'u}l Cal, "Downstream Evolution of Eddy Viscosity in the Wake of a Wind Turbine." In the proceedings of APS Division of Fluid Dynamics Meeting Abstracts, 2021.

Mass Consistent, Analytical Near Wake Models for Wind Turbines

Published in In the proceedings of APS Division of Fluid Dynamics Meeting Abstracts, 2021

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Recommended citation: Zein Sadek, Ra{\'u}l Cal, Nicholas Hamilton, "Mass Consistent, Analytical Near Wake Models for Wind Turbines." In the proceedings of APS Division of Fluid Dynamics Meeting Abstracts, 2021.

Design of the American Wake Experiment (AWAKEN) field campaign

Published in In the proceedings of Journal of Physics: Conference Series, 2022

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Recommended citation: Mithu Debnath, Andy Scholbrock, Daniel Zalkind, Patrick Moriarty, Eric Simley, Nicholas Hamilton, Chris Ivanov, Robert Arthur, Rebecca Barthelmie, Nicola Bodini, others, "Design of the American Wake Experiment (AWAKEN) field campaign." In the proceedings of Journal of Physics: Conference Series, 2022.

Wind plant controls

Published in Journal of Renewable and Sustainable Energy, 2022

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Recommended citation: Nicholas Hamilton, Dennice Gayme, Ra{\'u}l Cal, "Wind plant controls." Journal of Renewable and Sustainable Energy, 2022.

A baseline for ensemble-based, time-resolved inflow reconstruction for a single turbine using large-eddy simulations and latent diffusion models

Published in In the proceedings of Journal of Physics: Conference Series, 2023

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Recommended citation: A Rybchuk, LA Mart{\'\i}nez-Tossas, N Hamilton, P Doubrawa, G Vijayakumar, M Hassanaly, MB Kuhn, DS Zalkind, "A baseline for ensemble-based, time-resolved inflow reconstruction for a single turbine using large-eddy simulations and latent diffusion models." In the proceedings of Journal of Physics: Conference Series, 2023.

Characterization of wind turbine flow through nacelle-mounted lidars: a review

Published in Frontiers in Mechanical Engineering, 2023

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Recommended citation: Stefano Letizia, Peter Brugger, Nicola Bodini, Raghavendra Krishnamurthy, Andrew Scholbrock, Eric Simley, Fernando Port{\'e}-Agel, Nicholas Hamilton, Paula Doubrawa, Patrick Moriarty, "Characterization of wind turbine flow through nacelle-mounted lidars: a review." Frontiers in Mechanical Engineering, 2023.

Holistic Scan Optimization of Nacelle-Mounted Lidars for the Rotor Aerodynamics Aeroelastics and Wake (RAAW) Experiment

Published in In the proceedings of 103rd AMS Annual Meeting, 2023

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Recommended citation: Stefano Letizia, Nicola Bodini, Andrew Scholbrock, Nicholas Hamilton, Paula Doubrawa, "Holistic Scan Optimization of Nacelle-Mounted Lidars for the Rotor Aerodynamics Aeroelastics and Wake (RAAW) Experiment." In the proceedings of 103rd AMS Annual Meeting, 2023.

Investigations of Farm-to-Farm Interactions and Blockage Effects from AWAKEN Using Large-Scale Numerical Simulations

Published in In the proceedings of Journal of Physics: Conference Series, 2023

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Recommended citation: Lawrence Cheung, Alan Hsieh, Myra Blaylock, Thomas Herges, Nathaniel deVelder, Kenneth Brown, Philip Sakievich, Daniel Houck, David Maniaci, Collen Kaul, others, "Investigations of Farm-to-Farm Interactions and Blockage Effects from AWAKEN Using Large-Scale Numerical Simulations." In the proceedings of Journal of Physics: Conference Series, 2023.

Overview of the American Wake Experiment (AWAKEN)

Published in In the proceedings of 103rd AMS Annual Meeting, 2023

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Recommended citation: Patrick Moriarty, Nicola Bodini, Nicholas Hamilton, Tommy Herges, Giacomo Iungo, Hristo Ivanov, Colleen Kaul, Raghavendra Krishnamurthy, Stefano Letizia, Julie Lundquist, others, "Overview of the American Wake Experiment (AWAKEN)." In the proceedings of 103rd AMS Annual Meeting, 2023.

RAAW

Published in Technical Report, A2EDAP (Atmosphere to Electrons (A2e) Data Archive and Portal, Pacific~…, 2023

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Recommended citation: Paula Doubrawa, Christopher Kelley, Jonathan Naughton, Nicholas Hamilton, Hristo Ivanov, Stefano Letizia, Emina Maric, Andrew Scholbrock, Ken Brown, Thomas Herges, others, "RAAW." Technical Report, A2EDAP (Atmosphere to Electrons (A2e) Data Archive and Portal, Pacific~…, 2023.

Reconstructing Atmospheric Initial Conditions from Synthetic Field Measurements for Turbine Model Validation through Denoising Diffusion Probabilistic Models

Published in In the proceedings of 103rd AMS Annual Meeting, 2023

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Recommended citation: Alex Rybchuk, Malik Hassanaly, Luis Mart{\'\i}nez-Tossas, Nicholas Hamilton, Mitchell Fulton, Paula Doubrawa, "Reconstructing Atmospheric Initial Conditions from Synthetic Field Measurements for Turbine Model Validation through Denoising Diffusion Probabilistic Models." In the proceedings of 103rd AMS Annual Meeting, 2023.

An international benchmark for wind plant wakes from the American WAKE ExperimeNt (AWAKEN)

Published in In the proceedings of Journal of Physics: Conference Series, 2024

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Recommended citation: Nicola Bodini, Aliza Abraham, Paula Doubrawa, Stefano Letizia, Regis Thedin, Nathan Agarwal, B Carmo, L Cheung, W Rad{\"u}nz, Anurag Gupta, others, "An international benchmark for wind plant wakes from the American WAKE ExperimeNt (AWAKEN)." In the proceedings of Journal of Physics: Conference Series, 2024.

Bridging Real-World Lidar Measurements and Large-Eddy Simulation for Wind Turbine Validation Through Diffusion Models

Published in In the proceedings of 104th Annual AMS Meeting 2024, 2024

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Recommended citation: Alex Rybchuk, Paula Doubrawa, Stefano Letizia, Nicholas Hamilton, Andrew Scholbrock, Emina Maric, Luis Mart{\'\i}nez-Tossas, "Bridging Real-World Lidar Measurements and Large-Eddy Simulation for Wind Turbine Validation Through Diffusion Models." In the proceedings of 104th Annual AMS Meeting 2024, 2024.

Land-based wind plant wake characterization using dual-Doppler radar measurements at AWAKEN

Published in In the proceedings of Journal of Physics: Conference Series, 2024

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Recommended citation: Aliza Abraham, Nicholas Hamilton, Nicola Bodini, Brian Hirth, John Schroeder, Stefano Letizia, Raghavendra Krishnamurthy, Rob Newsom, Patrick Moriarty, "Land-based wind plant wake characterization using dual-Doppler radar measurements at AWAKEN." In the proceedings of Journal of Physics: Conference Series, 2024.

Observations of wind farm wake recovery at an operating wind farm

Published in Wind Energy Science Discussions, 2024

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Recommended citation: Raghavendra Krishnamurthy, Rob Newsom, Colleen Kaul, Stefano Letizia, Mikhail Pekour, Nicholas Hamilton, Duli Chand, Donna Flynn, Nicola Bodini, Patrick Moriarty, "Observations of wind farm wake recovery at an operating wind farm." Wind Energy Science Discussions, 2024.

One-to-one aeroservoelastic validation of operational loads and performance of a 2.8 MW wind turbine model in OpenFAST

Published in Wind Energy Science, 2024

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Recommended citation: Kenneth Brown, Pietro Bortolotti, Emmanuel Branlard, Mayank Chetan, Scott Dana, Nathaniel deVelder, Paula Doubrawa, Nicholas Hamilton, Hristo Ivanov, Jason Jonkman, others, "One-to-one aeroservoelastic validation of operational loads and performance of a 2.8 MW wind turbine model in OpenFAST." Wind Energy Science, 2024.

Overview of preparation for the American WAKE ExperimeNt (AWAKEN)

Published in Journal of Renewable and Sustainable Energy, 2024

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Recommended citation: Patrick Moriarty, Nicola Bodini, Stefano Letizia, Aliza Abraham, Tyler Ashley, Konrad B{\"a}rfuss, Rebecca Barthelmie, Alan Brewer, Peter Brugger, Thomas Feuerle, others, "Overview of preparation for the American WAKE ExperimeNt (AWAKEN)." Journal of Renewable and Sustainable Energy, 2024.

The American Wake Experiment (AWAKEN): leveraging observations to create international benchmarks

Published in In the proceedings of 104th Annual AMS Meeting 2024, 2024

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Recommended citation: Nicola Bodini, Patrick Moriarty, Stefano Letizia, Aliza Abraham, Nicholas Hamilton, Ryan Scott, Abhineet Gupta, Paula Doubrawa, Julie Lundquist, Brian Hirth, others, "The American Wake Experiment (AWAKEN): leveraging observations to create international benchmarks." In the proceedings of 104th Annual AMS Meeting 2024, 2024.

Validation of the stochastic inversion algorithm for acoustic travel-time tomography: a large eddy simulation study

Published in In the proceedings of Journal of Physics: Conference Series, 2024

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Recommended citation: Emina Maric, Nicholas Hamilton, Eliot Quon, Bumseok Lee, Regis Thedin, "Validation of the stochastic inversion algorithm for acoustic travel-time tomography: a large eddy simulation study." In the proceedings of Journal of Physics: Conference Series, 2024.

Wind Plant Impacts on Planetary Boundary Layer Height

Published in In the proceedings of 104th Annual AMS Meeting 2024, 2024

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Recommended citation: Aliza Abraham, Emina Maric, Matteo Puccioni, Arianna Jordan, Stefano Letizia, Nicola Bodini, Nicholas Hamilton, Sonia Wharton, Petra Klein, Elizabeth Smith, others, "Wind Plant Impacts on Planetary Boundary Layer Height." In the proceedings of 104th Annual AMS Meeting 2024, 2024.

A perspective on lessons learned and future needs for wind energy field campaigns

Published in Journal of Renewable and Sustainable Energy, 2025

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Recommended citation: Nicola Bodini, Patrick Moriarty, Stefano Letizia, Jakub Mann, Sonia Wharton, Georgios Deskos, Paula Doubrawa, J Fast, Nicholas Hamilton, Tommy Herges, others, "A perspective on lessons learned and future needs for wind energy field campaigns." Journal of Renewable and Sustainable Energy, 2025.

Ensemble-Based, Large-Eddy Reconstruction of Wind Turbine Inflow in a Near-Stationary Atmospheric Boundary Layer Through Generative Artificial Intelligence

Published in Wind Energy, 2025

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Recommended citation: Alex Rybchuk, Luis Mart{\'\i}nez-Tossas, Stefano Letizia, Nicholas Hamilton, Andy Scholbrock, Emina Maric, Daniel Houck, Thomas Herges, Nathaniel Velder, Paula Doubrawa, "Ensemble-Based, Large-Eddy Reconstruction of Wind Turbine Inflow in a Near-Stationary Atmospheric Boundary Layer Through Generative Artificial Intelligence." Wind Energy, 2025.

Hybrid renewable energy systems

Published in Journal of Renewable and Sustainable Energy, 2025

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Recommended citation: Nicholas Hamilton, Christopher Bay, Jie Zhang, "Hybrid renewable energy systems." Journal of Renewable and Sustainable Energy, 2025.

Influence of simple terrain on the spatial variability of a low-level jet and wind farm performance in the awaken field campaign

Published in Wind Energy Science Discussions, 2025

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Recommended citation: William Rad{\"u}nz, Bruno Carmo, Julie Lundquist, Stefano Letizia, Aliza Abraham, Adam Wise, Miguel Sanchez, Nicholas Hamilton, Raj Rai, Pedro Peixoto, "Influence of simple terrain on the spatial variability of a low-level jet and wind farm performance in the awaken field campaign." Wind Energy Science Discussions, 2025.

Upwind vs downwind: Loads and acoustics of a 1.5 MW wind turbine

Published in Wind Energy Science Discussions, 2025

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Recommended citation: Pietro Bortolotti, Lee Fingersh, Nicholas Hamilton, Arlinda Huskey, Chris Ivanov, Mark Iverson, Jonathan Keller, Scott Lambert, Jason Roadman, Derek Slaughter, others, "Upwind vs downwind: Loads and acoustics of a 1.5 MW wind turbine." Wind Energy Science Discussions, 2025.

Wind Turbine Wake Recovery for a Downwind Configuration

Published in In the proceedings of Division of Fluid Dynamics Annual Meeting 2025, 2025

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Recommended citation: Taiga Drucker-Boisvert, Zein Sadek, Ondrej Fercak, Nicholas Hamilton, Ra{\'u}l Cal, "Wind Turbine Wake Recovery for a Downwind Configuration." In the proceedings of Division of Fluid Dynamics Annual Meeting 2025, 2025.

talks

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teaching

Teaching experience 1

Undergraduate course, University 1, Department, 2014

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Teaching experience 2

Workshop, University 1, Department, 2015

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