Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/2035
標題: 簡諧振動之雙三角翼上方渦漩結構特性探討
The Invvestigation of Vortical Structure on Double Delta Wing by the Effect of S.H.M.
作者: 黃興杰
關鍵字: Double-Delta Wing;雙三角翼;Simple Harmonic Motion and Vortex Breakdown;俯仰簡諧運動及渦漩潰散
出版社: 機械工程研究所
摘要: 
本文主要探討方向為在靜態流場時雙三角翼翼面上方渦漩結構及
其交互作用隨攻角變化之影響;以及受到俯仰簡諧擺盪對其渦漩潰散
位置及渦漩動態發展模式之影響。所使用模型為:75/60度之雙三角翼,
其翼緣轉接處在翼弦長之中央點。在定量分析以FLDV量測特定截面上
之流場結構,而定性分析則以染液釋放法及雷射切光法進行流場觀察。
試驗結果顯示:在靜態流場實驗中,輔助翼渦漩與主翼渦漩潰散位置
會隨著攻角的增加往機翼頂點方向移動,而且其交互作用現象亦隨之
改變。在非靜態流場實驗中,由於雙三角翼受到俯仰簡諧擺動作用的
影響,其輔助翼渦漩潰散位置具有磁滯特性,亦即達到延遲渦漩潰散
之效果。

The purpose of this research is to understand that the vortical structure and interaction of strake and wing vortices vary with the angle of attack in steady flow and the effect of S.H.M. on a double-delta wing. A water-turnnel investigation was performed to study on a sharp-edge double-delta wing (75/60 deg., kink at midchord), by employing velocity measurement (FLDV), a dye-injection and laserlight-sheet visualization technigue. The results of the test show that a increasing angle of attack leads to the breakdown of strake and wing vortices moving upward the apex of a wing and the interaction of vortices altered in steady flow. On the effect of S.H.M., the breakdown of the strake vortex presented hysteresis, in other words, delays the vortex breakdown of it.
URI: http://hdl.handle.net/11455/2035
Appears in Collections:機械工程學系所

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