Results 21 to 30 of about 426,887 (303)

Wind Features and Wind Velocities [PDF]

open access: yesSymposium - International Astronomical Union, 1989
Fast winds have been detected in the spectra of many nuclei of planetary nebulae (PNNi). The wind velocities range from about 600 km/s to roughly 4000 km/s. While these winds add little to the mass of the nebular shells they may significantly effect their internal kinematics.By studying the emission from the faint outer envelopes of PNe one can infer ...
openaire   +1 more source

The effect of inlet curvature and flange on wind turbine diffuser performance

open access: yesE3S Web of Conferences, 2018
The modification is required to the conventional wind turbine in order to increase the power produced by the wind turbine located in the low wind velocity area. Attaching a diffuser to the conventional wind turbine is one of the ways to increase the wind
Nasir Muhammad   +3 more
doaj   +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

Influencing Factors of Flow Field of Ionic Wind Induced by Corona Discharge in a Multi-Needle-to-Net Electrode Structure Under Direct-Current Voltage

open access: yesIEEE Access, 2019
The morphologies and velocity of ionic wind induced by direct-current (DC) corona discharge were experimentally measured. DC voltage was applied to short air gaps of high-voltage electrode-needle electrode and grounding electrode-net electrode to ...
Fangcheng Lv   +4 more
doaj   +1 more source

Effect of wind speed over the chimney on the updraft velocity of a solar chimney power plant: An experimental study

open access: yesCase Studies in Thermal Engineering, 2022
The effect of wind speed on the updraft velocity and the overall performance of solar chimney power plants (SCPP) is still unclear, either positive or negative.
Mohamed F.C. Esmail   +3 more
doaj   +1 more source

Characteristics of Wind Velocity and Temperature Change Near an Escarpment-Shaped Road Embankment

open access: yesThe Scientific World Journal, 2014
Artificial structures such as embankments built during the construction of highways influence the surrounding airflow. Various types of damage can occur due to changes in the wind velocity and temperature around highway embankments.
Young-Moon Kim   +2 more
doaj   +1 more source

Particle Image Velocimetry Investigation of the Flow for the Curved Type Wind Turbine Shroud [PDF]

open access: yesJournal of Applied Fluid Mechanics, 2022
Determining the flow structure in the flanged diffuser shrouding designed to be used for a wind turbine, plays a vital role in improving efficiency in small-scale wind turbine technology.
A. İlhan   +4 more
doaj   +1 more source

Prediction of Wind Velocity to Raise Vortex-Induced Vibration through a Road-Rail Bridge with Truss-Shaped Girder

open access: yesShock and Vibration, 2018
Vortex-induced vibration (VIV) of bridges, related to fluid-structure interaction and maintenance of bridge monitoring system, causes fatigue and serviceability problems due to aerodynamic instability at low wind velocity.
Seungtaek Oh   +3 more
doaj   +1 more source

Method for Determining Neutral Wind Velocity Vectors Using Measurements of Internal Gravity Wave Group and Phase Velocities

open access: yesAtmosphere, 2019
This study presents a new method for determining a neutral wind velocity vector. The basis of the method is measurement of the group velocities of internal gravity waves.
Andrey V. Medvedev   +4 more
doaj   +1 more source

Performance Comparison of Different Building Shapes Using a Wind Tunnel and a Computational Model

open access: yesBuildings, 2022
A building-integrated wind turbine (BIWT) is an alternative way to assess renewable energy. BIWTs produces their own energy without relying on fossil fuels. However, only a few researchers have studied BIWTs.
Dany Perwita Sari, Kang-Pyo Cho
doaj   +1 more source

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