On the basis of hydrodynamics , the vortex shedding condition was investigated.

根据流体力学原理，分析静止管道的旋涡脱落；

The fluctuate drag and lift forces of tree branches in wind due to vortex shedding were estimated using the vortex induced vibration theory of circular cylinder.

采用圆柱绕流的涡致振动理论估算了树枝在风中因旋涡脱落而引起的脉动升力和阻力；

The frequency of vortex shedding and the position of separation are affected by the incidence and Mach number.

分离点的位置随着攻角和马赫数的变化而变化。

Such parameters of flow characteristics are investigated as lift and drag coefficient and vortex shedding frequencies.

计算了圆柱的升阻力系数、尾涡脱落频率等描述绕流问题的主要参量.