Multiple Vortex-Ring Model For Microburst Simulatio
學年 80
學期 1
發表日期 1991-12-01
作品名稱 Multiple Vortex-Ring Model For Microburst Simulatio
作品名稱(其他語言) 微風暴之多重環狀渦旋流模擬研究
著者 Wan, Tung; Lung, John
作品所屬單位 淡江大學航空太空工程學系
出版者 臺北市:中國航空太空學會
會議名稱 中國航空太空學會民國八十年學術研討會=The 1991 Aeronautics and Astronautics Conference of the Aeronautical and Astronautical Society of the R.O.C.
會議地點 臺北市, 臺灣
摘要 Microbursts formed near airports during thunderstorm activities have been responsible for several major airliner crashes. This weather phenomenon features a sudden and very intense downflow that can cause even the most sophisticated aircraft to quickly lose altitude. Proper airline transport pilot training in flight simulators is an effective way of achieving greater safety to aircraft against microbursts. Both steady and unsteady multiple-vortex-ring models are developed to simulate microbursts. The models use an impulsive free jet as an input to provide the central axial velocity of the vortex rings and their mirror images. Wind velocity fields are plotted to display the calculation results. For unsteady flow, trajectory plots are also made to demonstrate how the locations of the two vortex rings vary in mid air as time advance. The flow pattern and the interaction between two vortex rings are discussed. The predicted penetration of the smaller vortex ring through the larger one, when they share a common central axis, is shown in one of the unsteady cases. 微風暴曾經造成許多次飛機失事事件 ,本文之目的在於利用穩定及非穩定狀況下之 環狀渦旋流來模擬微風暴的流場。起始條件為 一突發之噴射氣流,在不同時刻之兩個環狀渦 旋流,其相互作用及流場示意圖將予以充份討 論。此計算所得之流場除可做為飛行訓練之用 外,且可增加吾人對於微風暴之了解。
關鍵字 微風暴;渦環;機場;飛行模擬;風速;自由噴流;Microburst;Vortex Ring;Airport;Flight Simulation;Wind Velocity;Free Jet
語言 en
會議性質 國內
研討會時間 19911201~19911201
國別 TWN
公開徵稿 Y
出版型式 紙本
出處 中國航空太空學會民國八十年學術研討會論文集=Proceedings of the 1991 Aeronautics and Astronautics Conference of the A; eronautical and Astronautical Society of the R.O.C., pp.261-273

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