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Modelling of downbursts based on physical experiments

, 2023
Horia Hangan, Federico Canepa, Massimiliano Burlando, D Romanic   +3 more
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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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Control of an aircraft in downbursts

Journal of Guidance, Control, and Dynamics, 1990
Guidance schemes are designed to approximate the optimal survival and optimal performance paths through downbursts, which were determined in the previous paper. Specifically, climb-rate command following is used to achieve performance, and altitude command following is used to enhance survivability.
Yiyuan Zhao, A. E. Bryson
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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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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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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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Takeoff and landing in a downburst

Journal of Aircraft, 1987
Investigations into landing and takeoff in a downburst are made with a simple wind model based on the flow toward a flat plate. Approaches along a given nominal glide path are analyzed. The influence of the changing wind on the aircraft's demand for energy is calculated. The results are given in energy height errors. Computer simulations of an aircraft
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Pressure distributions on a cube in a simulated thunderstorm downburst—Part A: stationary downburst observations

Journal of Wind Engineering and Industrial Aerodynamics, 2002
Abstract Thunderstorms are responsible for a large amount of wind-induced damage around the world. It is known that the wind characteristics in thunderstorms, particularly downbursts, differ significantly from those of synoptic scale boundary layer winds. This paper describes a study aimed at simulating the flow structure in a downburst and obtaining
M.T Chay, C.W Letchford
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Model of the wind field in a downburst

Journal of Aircraft, 1985
The downburst weather phenomenon produces a flow like that of a jet directed vertically downward at the ground. The resulting velocity field near the ground has been modeled as a classical ideal fluid flow generated by a suitable singularity distribution. The resulting model of horizontal, lateral, and vertical winds near the ground is quite realistic,
Shangxiang Zhu, Bernard Etkin
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