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題 名 | 通量式小板法在船體周圍興波勢流場計算之應用=Application of a Panel Method Based on Flux Concept in Calculating the Wave Making Potential Flow Around Ship Hulls |
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作 者 | 郭真祥; 黃維信; 葉鴻青; | 書刊名 | 力學 |
卷 期 | 13:4 1997.12[民86.12] |
頁 次 | 頁363-374 |
分類號 | 444.1 |
關鍵詞 | 通量觀念; 小板法; 線性興波效應; Flux concept; Panel method; Linear wave making effect; |
語 文 | 中文(Chinese) |
中文摘要 | 在電腦普遍應用與快速的計算能力配合之下,小板法為計算二維或三維任意外形 物體周圍勢流場有效的方法之一。本文之目的為發展一通量觀念的小板法,以計算船體周圍 加上線性自由水面興波效應之勢流場,其中通量式小板法的部份是應用通過船體表面之流體 平均通量為零的觀念來取代紐因曼條件 (Neumann condition),即流體不穿透船體表面的邊 界之滿足, 並將其直接代入物體的實際幾何曲面,目前只針對圓球、橢球、Wigley 船形等 形狀加以計算。至於線性自由水面興波效應之計算,則以 Dawson 之雙重模型及有限差分方 法處理之。 |
英文摘要 | With popular applications of more rapid computational ability of computers, the panel method has been one of the effective methods for calculating potential flow about arbitrary three-dimensional bodies. This paper deals with a high order geometrical panel method based on flux concept for calculating the linear wave making potential flow around ship hulls. It can be divided into two parts:The first part is concerned with the basic concept of the method by using an idea that the average flux due to the total sources through every discretized patch on the ship hull is zero instead of applying the Nuemann boundary condition. The condition is applied directly on the actual geometry surface of bodies. At first, the calculations are done only for spheres, ellipsoids, and Wigley hulls. The other part adds the linearized free surface wave making effect into the calculation. The free surface condition is disposed by the four-point upstream finite difference method proposed by C.W.Dawson in 1977. |
本系統中英文摘要資訊取自各篇刊載內容。