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題 名 | 二維噴流襟翼之噴流撓角做週期性擺動之性能研究=Study on the Performance of a Two-Dimensional Jet-Flapped Foil in the Periodical Swing of the Jet Deflection Angle |
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作 者 | 吳聰能; 陳義男; 張仁俊; | 書刊名 | 中國造船暨輪機工程學刊 |
卷 期 | 18:2 1999.05[民88.05] |
頁 次 | 頁27-37 |
分類號 | 444.1 |
關鍵詞 | 噴流襟翼; 非穩態運動; 小板法; Jet-flapped foil; Unsteady motion; Panel method; |
語 文 | 中文(Chinese) |
中文摘要 | 本文主要針對噴流撓角做週期性擺動對二維噴流襟翼之流體動力性能的影響進行 探討。本研究是利用小板法計算翼表面上的壓力分佈,進而積分得升力係數、縱傾力矩係數 及阻力係數等性能參數,以探討噴流撓角之擺動頻率與振幅及噴流係數等主要參數對噴流襟 翼之流體動力性能的影響。計算結果顯示,當噴流撓角做週期性擺動時,流場將產生延遲效 應,此一效應將造成有效噴流撓角的變小;且隨著噴流撓角擺動頻率增加,升力係數曲線的 相位落後就越大。 |
英文摘要 | The purpose of this paper is to study the hydrodynamic performance of a two-dimensional jet-flapped foil in an unsteady motion. The unsteady motion is that the jet deflection angle swings periodically. The numerical solution is obtained by using the panel method. The lift coefficient, pitching moment coefficient, and drag coefficient are calculated from the pressure distributions on the hydrofoil surface. The effects of the swing frequency, swing amplitude, and jet coefficient are investigated. The results show that the periodical swing of the jet deflection angle will generate the delay effect in the flow field. This effect will decrease the effective jet deflection angle. For higher swing frequency, the phase lag of lift coefficient curve is more. |
本系統中英文摘要資訊取自各篇刊載內容。