vortex-free

A model is developed for the calculation of the initial rotor tip vortex core radius aiming at eliminating the empirical parameters of the tip vortex in rotor free-vortex wake analysis.

建立了一个旋翼桨尖涡初始涡核半径计算模型，用于消除旋翼自由尾迹分析中桨尖涡涡核半径依靠经验设定的现状。

Regarding structure under wind load function crosswind upward power response, because comes the wind to receive running free to the wall surface impediment, has the vortex tattered and wind direction change, with the running free wind cutting hit, the wind power become further complex.

对于结构在风荷载作用下横风向上的动力响应，由于来风受到顺风向壁面的阻挡，发生漩涡破碎和风向改变，与顺风发生剪切撞击使得风力结构进一步复杂。

The gas flow in cyclone is mostly tangential flow, which has a regular velocity field, and the radial flow is minimum. The flow field is mainly composed of forced vortex flow and little free vortex flow.

通过研究看出，卧式旋风筒内气流流动主要是切向流动，径向流动最小，并且切向速度有较好的分布规律，主要是以强制涡区为主，自由涡区很小；