Results 11 to 20 of about 31,548 (253)
Self-Preservation of Turbulence Statistics in the Wall-Wake Flow of a Bed-Mounted Horizontal Pipe
Fluids, 2021 This research article analyzed the self-preserving behaviour of wall-wake region of a circular pipe mounted horizontally over a flat rigid sand bed in a shallow flow in terms of mean velocity, RSS, and turbulence intensities.
Kalpana Devi +3 more
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Experimental Investigation of 3D Dynamical Effects in a Wake behind Circular Cylinder [PDF]
MATEC Web of Conferences, 2022 A circular cylinder in crossflow is subjected to the study of 3D dynamical structure of its wake. The typical dynamics is characterized by quasi-periodic behaviour called Kármán – Bénard vortex street with the typical frequency in dimensionless form ...
Uruba Václav, Procházka Pavel
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International Journal of Renewable Energy Development, 2022 The objective of this paper is to investigate the ability of analytical wake models to estimate the wake effects between wind turbines (WTs). The interaction of multiple wakes reduces the total power output produced by a large offshore wind farm (LOFWF).
Mohammed Amine Hassoine +3 more
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Wake steering of multirotor wind turbines
Wind Energy, 2021 In this paper, wake steering is applied to multirotor turbines to determine whether it has the potential to reduce wind plant wake losses. Through application of rotor yaw to multirotor turbines, a new degree of freedom is introduced to wind farm control
Gustav A. Speakman +3 more
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A New Streamwise Scaling for Wind Turbine Wake Modeling in the Atmospheric Boundary Layer
Energies, 2022 In this study, we aim to investigate if there is a scaling of the streamwise distance from a wind turbine that leads to a collapse of the mean wake velocity deficit under different ambient turbulence levels.
Dara Vahidi, Fernando Porté-Agel
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Effects of Rotating Frame on a Vector Boson Oscillator
Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2021 We analyze the effects of the spacetime topology and angular velocity of rotating frame on the dynamics of a relativistic vector boson oscillator (VBO). To determine these effects on the energy of the VBO we solve the corresponding vector boson equation ...
Abdullah Guvendi
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Percentage-Based Change of Direction Deficit: A New Approach to Standardize Time- and Velocity-Derived Calculations [PDF]
Journal of Strength & Conditioning Research, 2021 Abstract Freitas, TT, Pereira, LA, Alcaraz, PE, Azevedo, PHSM, Bishop, C, and Loturco, I. Percentage-based change of direction deficit: a new approach to standardize time- and velocity-derived calculations. J Strength Cond Res 36(12): 3521–3526, 2022—Change of direction (COD) efforts are crucial in team sports, and an extensive body of ...
Tomás T. Freitas +5 more
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A New Analytical Wake Model for Yawed Wind Turbines
Energies, 2018 A new analytical wake model for wind turbines, considering ambient turbulence intensity, thrust coefficient and yaw angle effects, is proposed from numerical and analytical studies.
Guo-Wei Qian, Takeshi Ishihara
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Sap Flow Velocity in Fraxinus pennsylvanica in Response to Water Stress and Microclimatic Variables
Frontiers in Plant Science, 2022 In arid and semiarid regions with water shortage, forestry development is limited by water availability. Understanding how tree sap flow responds to water stress and microclimatic variables is essential for the management of trees and the understanding ...
Yu Su, Xinyu Wang, Yiqiu Sun, Hailong Wu
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Force deficits by stretches of activated muscles with constant or increasing velocity
Medicine & Science in Sports & Exercise, 2002 Force deficits produced by constant (CV) versus increasing velocity (IV) stretches of rat plantar flexor muscles at low and high levels of nerve activation were studied.Twenty repeated stretches were imposed on isometric contractions by ankle rotation from 90 degrees to 40 degrees at 300 degrees.s(-1) and at 3000 degrees.s(-2) during 80-Hz (CV80 and ...
Mark E T, Willems, William T, Stauber
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