查詢結果分析
相關文獻
- 應用以B木條曲線為基礎之高階小板法計算二維水翼勢流場
- 應用偶流高階小板法於勢流場之計算
- Bλ木條曲線--兼具內插與局部幾何特性控制之B木條曲線
- 潛體附加慣性之計算與試驗
- B2木條曲線特性之研究
- 高階小板法於線性興波阻力之應用
- Average Error Probability for Offset Quadrature Phase Modulated Ds-Ssma Communications Through Nakagami Fading Channel
- 起伏浮體流體動力之二維高階小板分析法
- Numerical Integration of the Standard Normal Distribution
- 無元素法高斯積分與置點積分耦合之研究
頁籤選單縮合
題 名 | 應用以B木條曲線為基礎之高階小板法計算二維水翼勢流場=A Higher Order Panel Method Based on B-splines for Potential Flow Calculation of 2D Hydrofoils |
---|---|
作 者 | 郭真祥; 劉人聞; | 書刊名 | 中國造船暨輪機工程學刊 |
卷 期 | 17:1 1998.02[民87.02] |
頁 次 | 頁49-60 |
分類號 | 444.1 |
關鍵詞 | 高階小板法; 偶流; B木條曲線; 高斯積分; 次小板; Higher order panel method; Doublet; B-splines; Gaussian quadrature; Sub-panel; |
語 文 | 中文(Chinese) |
中文摘要 | 以小板法計算二維物體周圍之勢流場,在此類方法,幾何方面的處理,一般將 物體外形以多邊形近似,每一邊則表示一直線小板,小板上之奇點分佈,則採用定值或一 次或二次函數,本文則利用開放週期B木條曲線(open pehodic B-splines)之方法來表示 物體的外形及奇點分佈,其中奇點是以偶流滿足Dirichlet內表面邊界條件之方式處理, 是一套幾何外形與解偶流分佈皆為高階之小板法,影響係數以數值方法中之高斯積分法則 計算,由於數值積分於奇點處會有準確度的問題,因此將一小板於奇點處分割成兩個"次 小板"後,再予以積分,可提昇數值積分準確度。針對不同翼型及攻角加以計算,所得結 果顯示:本文之方法在小板數目不是很高的情況下(約20-30),可得不錯之準確度。 |
英文摘要 | The panel method is one of the often used methods for computation of potential flow fields. In the method, the geometry of a two-dimensional body is generally represented by a number of linear panels. On each panel, a constant or linear or quadratic singularity distribution is assumed. In the present method, the geometry of the body and the singularity distribution are both represented by open periodic cubic B-splines. It is a potential based panel method by using only doublet to fulfill the internal Dirichlet boundary condition. The calculation of influence coefficients is conducted by applying the Gaussian quadrature algorithm. Since the numerical integration produces an large error at the singularity points, a panel is thus divided into two sub-panels at that point and the integration is then calculated for each sub-panel. In this way, the computational accuracy can be improved more efficiently. Some examples with different foil shapes and inflow angles of attack are chosen for testing purpose. It has been shown the present method has the advantage that good accuracy can be achieved with a relatively small number of panels. |
本系統中英文摘要資訊取自各篇刊載內容。