Results 151 to 160 of about 1,955 (191)

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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Investigation of various airplanes under downburst

21st Atmospheric Flight Mechanics Conference, 1996
A numerical scheme is applied to determine the influence of a downburst on the response and stability of several types of aircraft during powered approach. The downburst is modeled using 2D bell-type curves. All responses are analyzed for each type of aircraft.
M. Ghazi, K. Juhany
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The DOWNBURST MXO: a real-time downburst monitoring service in eastern Spain

In the framework of the DOWNBURST project, here we present the first real-time downburst monitoring service in eastern Spain. Downbursts are strong winds that descend from a thunderstorm and spread out quickly once they hit the ground. These extreme winds are one of the most damaging natural events and can reach the force and produce damages similar to
Cesar Azorin-Molina, Francisco Granell, Jose Gomez-Reyes, Carlos Calvo-Sancho, Andrés Barrio-Martín, Nuria P. Plaza-Martín, Andreas F. Prein, Sergio M. Vicente-Serrano, Luis Gimeno, Raquel Nieto, Deliang Chen, Tim R. McVicar, Zhenzhong Zeng, Amir Pirooz, Marcos Martínez-Roig, Juan Jesús González-Alemán, María Luisa Martín   +16 more
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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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DOWNBURSTS: Meteorological features and wind field characteristics

Journal of Wind Engineering and Industrial Aerodynamics, 1990
Abstract Since the term “downburst” was coined by the author back in 1976, it has been subclassified into “microburst” and “macroburst” according to the horizontal dimension of the wind system. Introduced in this paper is the basic observational evidence of the microburst investigated by three fact-finding projects in 1978, 1982, and 1986, at three ...
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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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Mesoscale Numerical Simulation of a Downburst

Advanced Materials Research, 2011
Downburst 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, Wei Lian Qu, Bin Wang, Yan Li, Bai Feng Ji   +4 more
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Experimental Simulation Of Downburst Lines: A Particle Image Velocimetry Study Of Downburst Collisions

Progress in Canadian Mechanical Engineering. Volume 4, 2021
Kyle Graat, Shivani Jariwala, Eric Savory   +2 more
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A simplified ring-vortex downburst model

28th Aerospace Sciences Meeting, 1990
Three 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, 1988
Abstract 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, James A. Moore, G. Brant Foote, Brooks Martner, Taneil Uttal, James M. Wilczak, Alfred R. Rodi   +6 more
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