vortex-free motion

The Self-induced Motion of a Spiral Vortex

螺旋涡丝的运动问题

The results show that the non-uniform flow wake induced by secondary motion and vortex always appear in the corner region of casing wall and pressure surface;

研究结果表明：二次流和涡运动导致叶道出口流动尾迹发生于外端壁/压力面角域；

An analytical method for predicting rotor vortex wake in low speed and hovering flight is described to investigate the motion of the helical tip vortex.

以重点考察旋翼尖涡的运动为目标来构想一种悬停和前飞旋翼涡尾流的理论计算方法。

The analytical method for predicting the hovering rotor wake is described to investigate the motion of the helical tip vortex.

用文中描述的尾流分析方法研究了螺旋尖涡的运动。

So it follows that all motion must inevitably take the form of circuit a vortex.

这么一来所有的运动就不可避免地会带来漩涡回路。