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Downburst outflow reconstruction by wind profile measurements

, 2019
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Turbulence characterization of downbursts using LES

Journal of Wind Engineering and Industrial Aerodynamics, 2015
Abstract Loads associated with downbursts represent a significant vulnerability on various structures. Designing the structures to withstand such loads requires the knowledge about the turbulent characteristics of downbursts, which are the focus of the current study.
Haitham Aboshosha, Ashraf El Damatty
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Optimal paths through downbursts

Guidance, Navigation and Control Conference, 1989
The control of an aircraft's takeoff path through a downburst is presently formulated as a dynamic optimization problem with minimum-altitude constraint and two different performance measures; a landing path through a downburst is also discussed. Paths are determined which, in addition to maximizing an airspeed/altitude combination immediately after ...
Yiyuan Zhao, A. E. Bryson
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Grid Validations for Downburst Simulations

Applied Mechanics and Materials, 2012
Downbursts, which resulted from the flow downdraft in thunderstorms, have become one of the most destructive disasters to buildings including transmission towers, etc. This disaster has drawn researchers’ interests and progresses have been continuously made by employing test and numerical tools.
Hui Xue Dang, Feng Li Yang, Jing Bo Yang
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Numerical simulation of downburst winds

Journal of Wind Engineering and Industrial Aerodynamics, 2009
The wind field of an intense idealised downburst wind storm has been studied using an axisymmetric, dry, non-hydrostatic numerical sub-cloud model. The downburst driving processes of evaporation and melting have been paramaterized by an imposed cooling source that triggers and sustains a downdraft.
Mason, Matthew, Wood, G, Fletcher, David
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Approach guidance in a downburst

Journal of Guidance, Control, and Dynamics, 1992
We present a nonlinear feedback law for safe aircraft penetration through downbursts on landing approach. It is based on following a nominal approach path relative to the ground, subject to a minimum airspeed constraint. The guidance design uses a point-mass aircraft model and considers the flight path to be in the vertical plane.
Yiyuan Zhao, A. E. Bryson
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Thunderstorm downburst risks to wind farms

Journal of Renewable and Sustainable Energy, 2013
As has been noted in recent experiences, thunderstorms can cause damage to turbine units that are part of a wind farm because of the correlated wind inflow fields that these units can be subjected to simultaneously. We extend a model for simulating thunderstorm downburst events and their effects on a single turbine unit to situations where multiple ...
Hieu Huy Nguyen, Lance Manuel
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Forecasting of Tornadoes and Downbursts

2020
Abstract Tornadoes and downbursts cause extreme wind speeds that often present a threat to human safety, structures, and the environment. While the accuracy of weather forecasts has increased manifold over the past several decades, the current numerical weather prediction models are still not capable of explicitly resolving tornadoes and
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Numerical Simulation of Downburst Wind Loads

2009 International Conference on Management and Service Science, 2009
Wind hazard is the one which has the widespread influence in the nature disaster. Transmission towers have experienced a number of failures due to downburst wind events in recent years, with devastating economical and social consequences. Based on the mechanism of downburst wind load, the present paper proposes an AR model method of adding turbulence ...
Jinwen Wang, Wei-lian Qu
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An empirical model of a downburst

Engineering Structures, 2000
Abstract A “downburst” was defined as a strong downdraft which induces an outburst of damaging winds on or near the ground. Such events normally occur during thunderstorms. It has been well documented that downbursts cause frequent failures of high voltage electricity transmission towers in Australia, and several other countries.
J.D Holmes, S.E Oliver
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