Results 21 to 30 of about 801 (186)

Semiempirical Models of Speedup Effect for Downburst Wind Field over 3-D Hills

open access: yesAtmosphere, 2023
Downbursts occur frequently in mountainous regions, such as the southwest of China, and causing extensive damage to engineering structures. While some researchers have developed semiempirical models for the speedup effect, most are based on the wind ...
Bowen Yan, Yini He, Chenyan Ma, Xu Cheng
doaj   +1 more source

Preliminary study on the causes of a downburst event in Tianjin in the summer of 2017

open access: yes暴雨灾害, 2022
A severe thunderstorm gale event with several short-term rainfall,hail and downburst occurred in the southwest of Tianjin on 9 July 2017, during which two downbursts attacked successively Duliu Town,Jinghai District,Tianjin.
Yanchun WANG   +4 more
doaj   +1 more source

Evaluation of Peak Transmission Line Conductor Reactions Under Downburst Winds Using Optimization and Simplified Approaches

open access: yesFrontiers in Built Environment, 2019
Transmission line structures, though designed per code provisions, have suffered several failures worldwide in the past. As reported in the body of the available literature, more than 80% of those failures are due to severe localized wind events such as ...
Atieh Al-Issa   +5 more
doaj   +1 more source

Frequency Domain Analysis of Alongwind Response and Study of Wind Loads for Transmission Tower Subjected to Downbursts

open access: yesBuildings, 2022
Downburst is one of the high-intensity winds that cause transmission tower failures. The regulations of transmission tower-line systems under downburst wind loads cannot meet the design requirements at present.
Yongli Zhong   +5 more
doaj   +1 more source

Numerical Study of the Flow Characteristics of Downburst-like Wind over the 3D Hill Using Different Turbulence Models

open access: yesApplied Sciences, 2023
With the rapid development of computational fluid dynamics (CFD) technology, it has been widely used to study the wind field characteristics of downbursts in mountainous areas.
Bowen Yan   +7 more
doaj   +1 more source

Oklahoma Downbursts and Their Asymmetry

open access: yesJournal of Climate and Applied Meteorology, 1987
Abstract Doppler radar data collected each spring in 1979–1984 with the two Doppler radars operated by the National Severe Storms Laboratory (NSSL) are used to investigate the asymmetry of low-altitude divergent outflows of convective storm downbursts in central Oklahoma.
Michael D. Eilts, Richard J. Doviak
openaire   +2 more sources

Numerical simulation on load characteristics of transmission tower under downburst and wind-rain conditions

open access: yesZhejiang dianli, 2023
To analyze the response characteristics and failure modes of transmission towers subjected to the combined effects of downbursts and rainstorms, a numerical simulation based on CFD (computational fluid dynamics) is used to investigate the distribution ...
WANG Shaohua   +5 more
doaj   +1 more source

Recent studies on downbursts

open access: yesWind Engineers, JAWE, 1985
Downbursts can be a significant hazard to aviation safety as well as to agricultural activities, structures and buildings on the ground. Major damages on the surface, airline incidents in the past, worns on the mechanism of the downburst occurrence and recent efforts to detect eho downburst are reviewed.
MONJI, Nobutaka, OMOTO, Yukio
openaire   +2 more sources

Pulsed wall jet simulation of a stationary thunderstorm downburst, Part A: Physical structure and flow field characterization

open access: yes, 2005
A pulsed wall jet has been used to simulate the gust front of a thunderstorm downburst. Flow visualization, wind speed and surface pressure measurements were obtained.
Letchford, C. W.   +5 more
core   +2 more sources

Downburst-like experimental measurements of two vertical-axis impinging jets at the WindEEE Dome

open access: yes, 2021
This dataset presents the comprehensive experimental campaign of measurements on downburst-like outflows produced by large-scale impinging jets in the WindEEE Dome simulator at Western University, Canada.
Canepa, Federico   +9 more
core   +1 more source

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