Results 181 to 190 of about 2,598 (220)

Dynamics of experimentally simulated microbursts

AIAA Journal, 1995
Laboratory-simulated microbursts are used to study the behavior of buoyancy-driven downdrafts and their associated low-altitude wind shears. The microburst flowfield is simulated by releasing an axisymmetric volume of heavy liquid into a less dense ambient surrounding and allowing it to impinge on a horizontal surface. Using particle image velocimetry,
Abbas Alahyari, Ellen K. Longmire
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Microburst escape using altitude guidance

Proceedings of the 37th IEEE Conference on Decision and Control (Cat. No.98CH36171), 2002
This paper compares three escape strategies for microburst encounters during final landing approach: altitude guidance, maximum angle-of-attack guidance, and constant pitch guidance. Altitude guidance with the lowest possible commanded altitude appears to be the safest strategy in that it yields the lowest probability of crash.
A. Dogan, P.T. Kabamba
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Modeling and Simulation of Microburst

Proceedings of the 2020 International Conference on Aviation Safety and Information Technology, 2020
Turbulence and windshear, especially low-altitude windshear, has great impact on successful flight. One of the most dangerous situations of low-altitude windshear associated with microburst phenomena. For the sake of avoiding or recovering microburst, we must know and study velocity trait of the wind profile.
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Turbulence structure in microburst phenomena

Journal of Aircraft, 1987
The efect on turbulence of a variable mean wind along the flight path of an aircraft is modeled and analyzed. It is found that the effect of a variable head or tail wind alters the magnitude of the length-scale of sensed microburst turbulence, rendering turbulence more random than usually encountered in the upper atmosphere.
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The Evolution and Structure of a “Bow-Echo–Microburst” Event. Part I: The Microburst

Monthly Weather Review, 1992
Abstract On 14 July 1982, a comprehensive multi-Doppler radar dataset was collected during the life cycle of an intense microburst-producing thunderstorm during the Joint Airport Weather Studies (JAWS) Project. This is believed to be one of the first attempts to study the temporal and spatial evolution of an entire microburst-producing thunderstorm. In
Wen-Chau Lee, Richard E. Carbone, Roger M. Wakimoto   +2 more
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Escaping a microburst with turbulence

Proceedings of the 2000 American Control Conference. ACC (IEEE Cat. No.00CH36334), 2000
This paper compares three escape strategies for microburst encounters during final landing approach: altitude guidance, dive guidance, and pitch guidance. In the paper, two different approaches are used for comparison. 1) In a sample analysis approach, typical samples of the time histories of various variables are analyzed. 2) In a statistical approach,
A. Dogan, P.T. Kabamba
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The Microburst Hazard to Aircraft

Weatherwise, 1984
In encounters with microbursts, low altitude aircraft first encounter a strong headwind which increases their wing lift and altitude; this phenomenon is followed in short succession by a decreasing headwind component, a downdraft, and finally a strong tailwind that catastrophically reduces wing lift and precipitates a crash dive.
John McCarthy, Robert Serafin
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Microburst Rotation: Simulations and Observations

Journal of Applied Meteorology, 1995
Abstract Microburst rotation can be determined by measuring the difference in azimuths between the maximum approaching and maximum receding velocity centers on a Doppler radar. Nonrotating microbursts would have these centers exactly along the same radial from the radar.
Ronald E. Rinehart, Alan Borho, Charles Curtiss   +2 more
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ELMO: ELectron Microburst Observatory mission to study microbursts

We describe the ELectron Microburst Observatory mission, ELMO  which is proposed as  aCubeSat constellation mission to fully characterize microburst event spatial extent systematically for the first time both in latitude  and longitude. ELMO comprises 4 CubeSats two per orbit plane in two orbit planes. ELMO will fly in a high
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Microburst vorticity

25th AIAA Aerospace Sciences Meeting, 1987
A. BEDARD, S. CAPLAN
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