The nonsmooth morphology of primaries is propitious to reducing the air vortexresistance which is caused by flapping volitation.
鸽初级飞羽的非光滑形态，有利于减少振翅飞翔中产生的空气漩涡的阻力。
2
Inner vortex speeding cyclone dust collector can increase the dust collecting rate, decrease system resistance and prevent dust from adhering on the wall.
内旋流加速旋风集尘器提高了粉尘率，减少了系统阻力，防止了粉尘粘壁。
3
Vortex-induced vibration is limited amplitude response, but it occurs at low wind speed with relative large amplitude, which will affect the strength and fatigue resistance of the structure.