Results 121 to 130 of about 201 (159)
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Takeoff and landing in a downburst
Journal of Aircraft, 1987Investigations 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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Mesoscale Numerical Simulation of a Downburst
Advanced Materials Research, 2011Downburst winds with their great destructive power have caused destruction of numerous engineering structures around the world. Study on wind loadings of downburst is essential and hot in the wind engineering field. But various meteorological factors of downburst formulation are not considered in existing research methods in the wind engineering field.
Yi Fei Wang +4 more
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Turbulence characterization of downbursts using LES
Journal of Wind Engineering and Industrial Aerodynamics, 2015Abstract 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 +2 more
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Progress in Canadian Mechanical Engineering. Volume 4, 2021
Kyle Graat +2 more
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Kyle Graat +2 more
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A simplified ring-vortex downburst model
28th Aerospace Sciences Meeting, 1990Three dimensional incompressible vortex rings are used to model downburst flow field, and modifications are made to express the induced velocities analytically. As a result, this three dimensional downburst model can be used in trajectory optimization, as well as in flight simulations.
YIYUAN ZHAO, A. BRYSON
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Convection Initiation and Downburst Experiment (CINDE)
Bulletin of the American Meteorological Society, 1988Abstract The Convection Initiation and Downburst Experiment (CINDE) was conducted in the Denver, Colorado area from 22 June to 7 August 1987 to study processes leading to the formation of deep convection and the physics of downbursts. A total of 6 Doppler radars, 87 mesonet stations.
James W. Wilson +6 more
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Feedback control for penetrating a downburst
Guidance, Navigation and Control Conference, 1987Feedback logic is given that produces satisfactory penetration of an aircraft through a severe downburst. The logic has two parts: (1) A switch that calls for full throttle and tight climb-rate-hold feedback logic when the magnitude of headwind-rate exceeds a threshold level; this switch stays on until re-set by the pilot after penetration of the ...
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A Numerical Study of a Rotating Downburst
Journal of the Atmospheric Sciences, 1993Abstract Previous studies have revealed that convective storms often contain intense small-scale downdrafts, termed “downbursts,” that are a significant hazard to aviation. These downbursts sometimes possess strong rotation about their vertical axis in the lower and middle levels of the storm, but studies of how this rotation is produced and how it ...
David B. Parsons, Morris L. Weisman
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Thunderstorm downbursts: Windstorms and blowdowns
2021Matthew J. Bunkers, Mark R. Hjelmfelt
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Downbursts from Innocuous Clouds: An Example
Weather and Forecasting, 1991Abstract A microburst occurred at Goodland, Kansas, on 4 March 1990. This event was unique in the sense that it occurred at 0348 AM MST (1048 UTC) and produced 14°F (7.8°C) of warming. The environment along the High Plains exhibited characteristics similar to those associated with dry microbursts documented in the literature.
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