Results 11 to 20 of about 45,309 (164)

Coriolis recovery of wind farm wakes [PDF]

Wind Energy Science
Two mechanisms cause wind speed recovery in the wake of a wind farm: momentum mixing and the Coriolis force. To study these mechanisms, we use a steady linearised two-layer fast Fourier transform (FFT) model so that both analytical expressions and full ...
R. B. Smith, B. J. Gribben
doaj   +3 more sources

Validation of Tidal Stream Turbine Wake Predictions and Analysis of Wake Recovery Mechanism [PDF]

Journal of Marine Science and Engineering, 2019
This paper documents the predictive capability of rotating blade-resolved unsteady Reynolds averaged Navier-Stokes (URANS) and Improved Delayed Detached Eddy Simulation (IDDES) computations for tidal stream turbine performance and intermediate wake ...
Sanchit Salunkhe, Oumnia El Fajri, Shanti Bhushan, David Thompson, Daphne O’Doherty, Tim O’Doherty, Allan Mason-Jones   +6 more
doaj   +2 more sources

Observations of wind farm wake recovery at an operating wind farm [PDF]

Wind Energy Science
The interplay of momentum surrounding wind farms significantly influences wake recovery, affecting the speed at which wakes return to their freestream velocities. Under stable atmospheric conditions, wind farm wakes can extend over considerable distances,
R. Krishnamurthy, R. K. Newsom, C. M. Kaul, S. Letizia, M. Pekour, N. Hamilton, D. Chand, D. Flynn, N. Bodini, P. Moriarty   +9 more
doaj   +4 more sources

Employment recovery in the wake of the COVID-19 pandemic [PDF]

Monthly Labor Review, 2020
The coronavirus disease 2019 (COVID-19) pandemic’s impact on the U.S. labor market is unprecedented. This article reviews economic research on recent pandemic-related job losses in the United States in order to understand the prospects for employment recovery.
Elizabeth Handwerker, Peter Meyer, Joseph Piacentini, Michael Schultz, Leo Sveikauskas   +4 more
openaire   +1 more source

New Key Recovery in WAKE Protocol [PDF]

, 2001
Wireless authentication and key establishment (WAKE) protocols are essential in mobile communications. The key recovery mechanism may also be required in mobile communication systems for the investigation of serious crimes and for national security. Recently some protocols that give key recovery in the WAKE protocol have been published.
Kim, CH, Lee, PJ
openaire   +2 more sources

Brief communication: A novel wake mixing phenomenon and key parameters for wake recovery of floating wind turbines subjected to surge motions [PDF]

Wind Energy Science
This letter clarifies the key parameters governing the wake recovery of a floating wind turbine undergoing surge motions. A dedicated wind tunnel campaign covering reduced frequencies (Stp) well beyond the current literature is presented.
C. W. Schulz, M. Hölling, M. Hölling, J. Peinke, J. Peinke, T. Messmer, T. Messmer, T. Messmer   +7 more
doaj   +1 more source

Impact of Turbulent Time Scales on Wake Recovery and Operation [PDF]

Journal of Physics: Conference Series, 2022
Abstract Enhancing wake recovery behind wind turbines has the potential to significantly improve the power production and efficiency of large wind farms. Rather than investigating turbine control strategies, floater motion or global turbulent quantities such as turbulence intensity, this work aims to study wake stability and recovery ...
Hodgson, E. L.; id_orcid 0000-0001-6443-2628, Aa Madsen, M. H., Troldborg, N., Andersen, S. J.; id_orcid 0000-0002-5935-751X   +3 more
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Supply chain recovery challenges in the wake of COVID-19 pandemic

Journal of Business Research, 2021
The COVID-19 pandemic has revealed the fragility of global supply chains arising from raw material scarcity, production and transportation disruption, and social distancing. Firms need to carefully anticipate the difficulties during recovery and formulate appropriate strategies to ensure the survival of their businesses and supply chains.
Paul, Sanjoy Kumar, Chowdhury, Priyabrata, Moktadir, Md. Abdul, Lau, Kwok Hung   +3 more
openaire   +2 more sources

Slow wake recovery and low turbulence behind wind farms parameterized in mesoscale simulations [PDF]

Wind Energy Science
Numerical weather prediction (NWP) and climate models equipped with wind-farm parameterizations (WFPs) can simulate cluster wake effects affecting downstream wind farms in both onshore and offshore environments.
W. C. Radünz, J. H. Kasper, R. J. A. M. Stevens, J. K. Lundquist, J. K. Lundquist   +4 more
doaj   +1 more source

Experimental Analysis and Evaluation of the Numerical Prediction of Wake Characteristics of Tidal Stream Turbine

Energies, 2017
It is important to understand tidal stream turbine performance and flow field, if tidal energy is to advance. The operating condition of a tidal stream turbine with a supporting structure has a significant impact on its performance and wake recovery. The
Yuquan Zhang, Jisheng Zhang, Yuan Zheng, Chunxia Yang, Wei Zang, E. Fernandez-Rodriguez   +5 more
doaj   +1 more source