An analysis of periodic flow streamlines shows that it is probably due to the effect of leading edge vortex.
通过对沉浮运动一个周期流线图的分析，认为这是翼型前缘涡的影响造成的。
2
The results show that the wavy interface and vortex street are caused by the velocity distribution of shear flow and periodic disturbance at the interface.
研究表明波状界面和涡街是由界面处的剪力流速度分布和周期性扰动所造成的。
3
The quantum tunneling of a vortex in an annular Josephson junction is investigated by using the periodic instanton method.