80 citations · 294 across the 10 of their papers we have counts for
10 papers
Time-varying wind-turbine wakes at high Reynolds numbers
Nathaniel J. Wei, Adina Y. Fleisher, John W. Kurelek +1
Wind turbines operating in the atmospheric boundary layer are constantly exposed to time-varying flow conditions. These disturbances often occur on similar time scales to wind-turb…
Wake dynamics of wind turbines in unsteady streamwise flow conditions
Nathaniel J. Wei, Adnan El Makdah, JiaCheng Hu +3
The unsteady flow physics of wind-turbine wakes under dynamic forcing conditions are critical to the modeling and control of wind farms for optimal power density. Unsteady forcing…
Modeling unsteady loads on wind-turbine blade sections from periodic structural oscillations and impinging gusts
Nathaniel J. Wei, Omkar B. Shende
Many traditional methods for wind turbine design and analysis assume quasi-steady aerodynamics, but atmospheric flows are inherently unsteady and modern turbine blades are suscepti…
Power-generation enhancements and upstream flow properties of turbines in unsteady inflow conditions
Nathaniel J. Wei, John O. Dabiri
Energy-harvesting systems in complex flow environments, such as floating offshore wind turbines, tidal turbines, and ground-fixed turbines in axial gusts, encounter unsteady stream…
Phase-Averaged Dynamics of a Periodically Surging Wind Turbine
Nathaniel J. Wei, John O. Dabiri
The unsteady power generation of a wind turbine translating in the streamwise direction is relevant to floating offshore wind turbines, kite-mounted airborne wind turbines, and oth…
Near-wake structure of full-scale vertical-axis wind turbines
Nathaniel J. Wei, Ian D. Brownstein, Jennifer L. Cardona +2
To design and optimize arrays of vertical-axis wind turbines (VAWTs) for maximal power density and minimal wake losses, a careful consideration of the inherently three-dimensional…
Sinusoidal-gust generation with a pitching and plunging airfoil
Nathaniel J. Wei, Johannes Kissing, Cameron Tropea
The generation of uniform, periodic gust disturbances in an experimental context is demonstrated using a single oscillating airfoil. A pitching and heaving symmetric airfoil is sug…
Insights into the Periodic Gust Response of Airfoils
Nathaniel J. Wei, Johannes Kissing, Tom T. B. Wester +6
The unsteady lift response of an airfoil in a sinusoidal gust can be modeled by two transfer functions: the first-order Sears function and the second-order Atassi function, albeit…
Control of long-range correlations in turbulence
Kevin P. Griffin, Nathaniel J. Wei, Eberhard Bodenschatz +1
The character of turbulence depends on where it develops. Turbulence near boundaries, for instance, is different than in a free stream. To elucidate the differences between flows,…
Flow speed has little impact on propulsive characteristics of oscillating foils
Tyler Van Buren, Daniel Floryan, Nathaniel Wei +1
Experiments are reported on the performance of a pitching and heaving two-dimensional foil in a water channel in either continuous or intermittent motion. We find that the thrust a…