升力线 meaning in English
lift line
lift wire
lifting line
lifting-line
Examples
- Prandtl lifting line theory
普朗特升力线理论 - Lifting line theory
升力线理论 - The aerodynamic interference between the shroud and the propeller is calculated by lifting line theory . its precise , proved by wind tunnel test here , satisfies the engineering demand
在计算螺旋桨的参数时，仍以有限叶数升力线模型进行处理，并用诱导因子法来计算桨叶尾涡系在升力线上产生的诱导速度。 - In the present work , there are two methods to design the shrouded - propeller . one is based on the blade element and momentum theory , the other is based on the ufbng - line ( surface ) theory derived from circumfluence theory
在实际工作中，函道螺旋桨的设计有两种方法，一种是基于叶素理论与动量定理的工程方法；另一种是基于升力线(面)方法的环流理论方法。 - The paper has improved the existing lifting - line and lifting - surface design method by including the rake and skew and solving the optimum circulation distribution with the optimum theory . the blade geometry is expressed with b - spline for the lift - surface method . the boundary condition on the blade is transformed to minimize the summation of the square of normal velocities , the fair blade geometry can be obtained by present technique and the design quality is better
改进了现有的升力线和升力面设计方法，在升力线设计中计及桨叶的纵倾和侧斜的影响，用优化理论求解最佳环量分布，升力面设计中用b样条来拟合桨叶，将物面边界条件转化为求法向速度分量的平方最小，由此可得到光顺的桨叶几何形状，提高和改进了设计质量。