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首页> 外文期刊>Chinese journal of aeronautics >Study on Forms of Vortex Breakdown over Delta Wing
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Study on Forms of Vortex Breakdown over Delta Wing

机译：三角翼涡旋破坏形式的研究

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Visualization test is performed at the water channel of BUAA. The vortex core is visualized by dye injection from a small tube located upstream the apex of a delta wing. The test results are recorded by a video camera connected to a computer and processed by Photoshop~(~R) software. The test shows new findings in the following respects: (1) Besides the well known spiral and bubble forms of vortex breakdown, there are 3 other forms of vortex breakdown over delta wing found in the test. They are the frog-jump form, the double spiral form and the filiform spiral form. (2) It has also been found that there is a transition from the spiral form to the bubble form and then back to the spiral form in the test. Therefore it shows that the spiral form vortex breakdown over delta wing is often observed. (3) In a certain sense it can be said that the bubble form of vortex breakdown is a special case of the spiral form type. There is no essential difference between them. For the bubble form of vortex breakdown , there are branches of the vortex core and many elements carrying vorticity separated from the vortex core. However, there is at least one vortex filament that forms a spiral or a complex warping shape.
机译：可视化测试在BUAA的水道上进行。通过从位于三角翼尖顶上游的小管中注入染料可以看到涡旋核。测试结果由连接到计算机的摄像机记录，并由Photoshop〜（R）软件处理。该测试在以下方面显示了新发现：（1）除众所周知的涡旋破坏的螺旋和气泡形式外，在测试中还发现了三角翼上的3种其他形式的涡旋破坏。它们是青蛙跳跃形式，双螺旋形式和丝状螺旋形式。 （2）还发现在测试中存在从螺旋形式到气泡形式然后再回到螺旋形式的转变。因此，它表明经常观察到三角翼上的螺旋形涡旋破裂。 （3）从某种意义上说，涡旋破裂的气泡形式是螺旋形式类型的特例。它们之间没有本质区别。对于涡旋破裂的气泡形式，存在涡旋核的分支，并且许多携带涡旋的元素与涡旋核分离。但是，至少有一个涡旋丝形成螺旋形或复杂的翘曲形状。

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