Results 51 to 60 of about 1,254,050 (194)

Contactless Measurement of Hypervelocity Projectile Wake Velocity Distribution

open access: yesIEEE Access, 2019
This paper presents a microwave approach to investigate the wake velocity distribution of hypervelocity projectile. The ballistic range measurement is carried out to model the transport of hypervelocity object on the ground.
Bixiao Jiang   +6 more
doaj   +1 more source

Wakes and differential charging of large bodies in low Earth orbit [PDF]

open access: yes, 1985
Highlights of earlier results using the Inside-Out WAKE code on wake structures of LEO spacecraft are reviewed. For conducting bodies of radius large compared with the Debye length, a high Mach number wake develops a negative potential well ...
Parker, L. W.
core   +1 more source

Experimental study of yawed inflow around wind turbine rotor [PDF]

open access: yes, 2012
In this article, we present an experimental study in a wind tunnel of a three-bladed, Rutland 503 model, horizontal axis yawed wind turbine. Power measurement and an exploration downstream wake of the turbine using particle image velocimetry measurements
DIZENE, Rabah   +4 more
core   +6 more sources

The UTRC wind energy conversion system performance analysis for horizontal axis wind turbines (WECSPER) [PDF]

open access: yes, 1981
The theory for the UTRC Energy Conversion System Performance Analysis (WECSPER) for the prediction of horizontal axis wind turbine performance is presented.
Egolf, T. A., Landgrebe, A. J.
core   +1 more source

A Fast-Slow Analysis of the Dynamics of REM Sleep

open access: yes, 2012
Waking and sleep states are regulated by the coordinated activity of a number of neuronal population in the brainstem and hypothalamus whose synaptic interactions compose a sleep-wake regulatory network.
Booth, Victoria, Diniz Behn, Cecilia G.
core   +1 more source

Upstream-radiated rotor–stator interaction noise in mean swirling flow [PDF]

open access: yes, 2005
A major component of the noise in modern aeroengines is rotor–stator interaction noise generated when the wake from the rotating fan impinges on a stator row downstream.
Cooper, A. J., Peake, N.
core   +1 more source

Computational Optimization of Adaptive Hybrid Darrieus Turbine: Part 1

open access: yesFluids, 2019
Darrieus-type Vertical Axis Wind Turbines (VAWT) are promising for small scale decentralized power generation because of their unique advantages such as simple design, insensitive to wind direction, reliability, and ease of maintenance.
Palanisamy Mohan Kumar   +5 more
doaj   +1 more source

Wake Analysis of Wind Turbine Based on Scanning Images from Doppler Lidar

open access: yes南方能源建设
[Objective] To fully explore the data value of lidar in wind turbine wake observation, conduct an in-depth study on the three-dimensional (3D) wake structure and wind speed attenuation characteristics in wake zone, and further provide references for ...
Yanfeng CAI, Fareng YAO, Jiyan WANG
doaj   +1 more source

Wake of a Ducted Vertical Axis Tidal Turbine in Turbulent Flows, LBM Actuator-Line Approach

open access: yesEnergies, 2019
Vertical axis tidal turbines are devices that extract the kinetic energy from tidal currents. Tidal currents can be highly turbulent. Since ambient turbulence affects the turbine hydrodynamic, it is critical to understand its influence in order to ...
Mikaël Grondeau   +3 more
doaj   +1 more source

Effects of Bubble Wake on Coalescence Between Planar Bubbles

open access: yesJournal of Fluid Science and Technology, 2006
Coalescence of two planar air bubbles in stagnant water filled in two parallel plates was experimentally investigated. To examine the effects of bubble wake on coalescence, the bubble diameter, initial vertical and horizontal distances between two ...
Shigeo Hosokawa, Akio Tomiyama
doaj   +1 more source

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