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題 名 | A Various Rectangular Block Effects on an Impinging Twin-Jet Flow Field=方型塊狀阻物之雙噴射撞擊流場分析 |
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作 者 | 莊書豪; 宋鴻明; 鄭博仁; | 書刊名 | 樹德學報 |
卷 期 | 25 2000.03[民89.03] |
頁 次 | 頁33-54 |
分類號 | 447.553 |
關鍵詞 | 塊狀阻物; 雙噴射撞擊流場; 上沖噴泉氣流; 壓擠效應; Block; Impinging twin-jet; Fountain up-wash; Squeezed effect; |
語 文 | 英文(English) |
中文摘要 | 為了模擬實際垂直起降飛機在凹凸不平地表上從事起飛之流場,本文在下平板處置一不同高度、寬度之塊狀阻物,利用SIMPLE-C法則,Power-law Scheme,K-ε雙方程式紊流模式,並配合ADI計算之數值方法,分析此塊狀阻物在各種幾何形狀下對雙噴射撞擊流場結構,如壓力、速度、紊流動能與升力之影響。數值分析結果顯示,在噴嘴外側之迴流區受到塊狀阻物之影響產生壓擠效應及縮短效應,而此兩種效應對升力會造成極大的改變。 |
英文摘要 | The vertical take-off and landing (VTOL) military airplane working on the rough ground is analyzed the SIMPLE-C algorithm, power-law scheme, two equation K-ε turbulent model, and alternating direction implicit (ADI) method are used to simulate the strong turbulence of the impinging twin-jet flow with block effects in numerical simulation. The properties in the flowfield structure of the impinging twin-jet are solved and shown such as pressure, velocity, turbulent kinetic energy and lift force under the block effects of different width and height. The lift force is strongly affected by the squeezed and shortened effects of reciculation zones induced beside the twin-jet inlet. |
本系統中英文摘要資訊取自各篇刊載內容。