使用三角帆和顶帆，可以减小升力，有助于船只稳定航行。
Top sail spinnaker and use, can reduce the lift and help to stabilize sailing vessels.
这将有效地“拉”前沿周围的空气，从而防止失速到一个更高的入射角和升力系数。
This effectively "pulls" the air around the leading edge, thus preventing the stall up to a much higher Angle of incidence and lift coefficient.
考虑了不同飞行攻角、不同燃料流率下气动参数，包括升力系数、阻力系数和俯仰力矩系数的变化规律。
The change rules of aerodynamic parameters including lift coefficient, drag coefficient and pitch moment coefficient have been analyzed when Angle of attack and fuel flow rate is changed.
给出了水动力系数相对于间距、攻角的回归公式，并划分了三个典型的干扰区域：升力区、混合区、阻塞区。
The regressive formulae of hydrodynamic coefficients relative to clearances, attack angles were given. Three typical interaction regions were divided, defined as Lifting, Mixed and Blocking region.
研究表明，流体剧烈变化的热物性、浮升力以及三角管的几何特征对管内流动换热的影响非常明显。
The results suggest that the effects of buoyancy force, variable physical properties of the fluid, and duct geometric characteristic on flow and heat transfer can be very significant.
基于扇翼机的飞行原理，提出通过改变攻角以及增加尾部升力面弦长的方式提高气动效率，进而实现垂直升降的方法。
Based on the principle of flight of fan wing aircraft, realizing methods of VTOL are preposed by changing the Angle of attack and increasing chord length of the tail.
当叶片安装角度改变后，叶片对水的升力也就改变了，从而改变了水泵的工作性能，这就是轴流泵的变角调节。
When the blade installation Angle changes, the leaves of water lift is changed, thus changing the water pump job performance, this is the axial flow pump of the variable Angle adjustment.
建立了旋翼升力线模型和广义尾迹模型，在计算角迹涡线诱导速度时，采用了快速收效方法。
Both lift line model and generalized wake model are founded in this paper. A method is given for calculating induced velocities by a wake vortex line which results in a rapid convergence.
建立了旋翼升力线模型和广义尾迹模型，在计算角迹涡线诱导速度时，采用了快速收效方法。
Both lift line model and generalized wake model are founded in this paper. A method is given for calculating induced velocities by a wake vortex line which results in a rapid convergence.
应用推荐