A Study of Modelling Early Warning after Microburst Three-Dimensional Wind Field
WANG Dayun
SONG Dawei
MA Yuzhao
Abstract：Three-dimensional wind field structures with single,asymmetric,and twin microbursts,and their impacts on flight safety are studied systematically.First,a computational fluid dynamics(CFD)model is constructed by using FLUENT to simulate the microburst-induced wind fields.And then,on the basis of the simulated data,airborne weather radar Doppler echoes are calculated to analyze the spatial dis-tribution and signal characteristics of each microburst type.Finally,an average F-factor is employed to quantitatively assess the threat level to aircraft.The results show that the single microburst produces a strong symmetric downdraft comparatively,the wind speed peaks of the asymmetric microburst and spa-tial shifts are closely related to the ambient wind direction,and the twin microburst generates intense up-drafts between converging downdrafts.Among the three,the twin microburst is the most risk to flight safety,whereas the asymmetric type is relatively the lowest.
Keywords：microburstwind shearwind field simulationradar echo simulationF-factor
Publication Date：2025-12-25
Online Publishing Date：2025-12-26(First online date of this platform, not the publication date of the document)
Pages：10( 35-44 )