Results 21 to 30 of about 10,050 (162)
Numerical Simulation of Wind Turbine Aerodynamic Characteristics under Wind Shear Based on Lattice-Boltzmann Method [PDF]
E3S Web of Conferences, 2021 In order to study the influence of wind shear on the aerodynamic characteristics of large wind turbines, taking the 5MW wind turbine blade model published by NREL as the research object, large eddy simulation (LES) of wind turbines was carried out by ...
Yuan Chengdong +4 more
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Wind shear for small thickness layers [PDF]
Conference on Aerospace Meteorology, 1966 Abstract Wind shear in the lowest 10,000 it of the atmosphere was investigated utilizing two or more cinetheodolites (Contraves cameras) tracking a smooth spherical 100-gm balloon. These data indicate that a simple power law relationship exists between 1) layer thickness and the magnitude of the vector shear, 2) layer thickness and the magnitude of the
Manuel Armendariz, Laurence J. Rider
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Flow shear across solar wind discontinuities: WIND observations [PDF]
Geophysical Research Letters, 1998 We examine the tangential magnetic field and velocity shears across directional discontinuities (DDs) with significant change in magnetic field intensity observed by WIND in slow and fast solar wind streams. The magnetic field rotation sense in fast wind DDs is that predicted by theory for outward propagating rotational discontinuities (RDs), but flow ...
J. De Keyser, M. Roth, A. Söding
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Applied Sciences, 2020 Noise generated from wind turbines is a big challenge for the wind energy industry to develop further onshore wind energy. The traditional way of reducing noise is to design low noise wind turbine airfoils and blades.
Mingyue Zhou +3 more
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Hong Kong Airport Wind Shear Now-Casting System Development and Evaluation
Atmosphere, 2022 A wind-shear now-casting system for Hong Kong International Airport is described. The system has been configured and run retrospectively for the period from January to April 2018 at 20-min intervals using two sets of meteorological inputs to quantify ...
Jenny Stocker +6 more
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Study on the influence of topography on wind shear numerical simulations based on WRF–CALMET [PDF]
Geoscientific Instrumentation, Methods and Data SystemsThis study focuses on the critical issue of low-altitude wind shear, which is vital for aircraft safety during takeoff and landing. Using the WRF–CALMET model, we assess the impact of topography on low-level wind shear at Zhongchuan Airport.
X. Wang +5 more
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Wind Turbine Wakes in Directionally Varying Wind Shears [PDF]
, 2019 In the atmospheric boundary layer, the Coriolis force associated with the Earth’s rotation induces a spanwise wind shear in addition to the wall-normal one leading to a continuous change in wind direction with height. The spanwise wind shear in directionally sheared inflow has a significant impact on the formation and development of wind-turbine wakes.
Abkar, Mahdi +2 more
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Windshear Identification Algorithms by Doppler Pulse Lidar [PDF]
ITM Web of Conferences, 2019 Doppler pulse lidars are increasingly common as a tool for monitoring hazardous wind phenomena. Possible applications include measurements of wake vortices behind aircraft, detection of vertical and horizontal wind shear, detection of gust fronts, and ...
Baranov Nikolay, Lemishchenko Ekaterina
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A Study of Wind Shear Influences on the Aerodynamic Performances of a UAV Airfoil
Applied Sciences, 2023 In order to study the flight strategies of birds in shear wind and realize the long-range flight of an unmanned aerial vehicle (UAV), the aerodynamic performances of a UAV’s airfoil under different shear wind are studied using numerical methods.
Yin Yang, Dawei Liu, Lianshan Lu
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Meteorologische Zeitschrift, 1997 Many meteorological services operate ground-based observing systems for wind shear warning. In this study, wind shear data from a 1 GHz profiler at the airport Zurich was compared with data obtained from the ground-based AMETIS 1 system.
Thomas Griesser +2 more
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