lifting-surface meaning in Chinese
升力面理论
Examples
- Numerical lifting - surface theory has been developed as a practical tool in predicting marine propeller ' s hydrodynamic performance because it is easily being computed and accurate for application
升力面理论由于方法简单易行，它可以对螺旋桨的水动力性能作出非常准确的预报，是当前求解螺旋桨的水动力性能有力的分析工具。 - In the second part , firstly , the mathematical model for predicting hydrodynamic characteristics of varivec propeller under steady or unsteady condition are present , based on the general propeller lifting - surface theory , potential flow theory and green theorem . then , theoretical calculation methods for predicting hydrodynamic characteristics of varivec propeller designed above paragraphs are present , based on the finite basic solution method , the unsteady vortex lattice method and hess - smith method
在理论计算部分，本文首先基于常规螺旋桨升力面理论、势流理论和格林定理建立了定常和非定常状态下全方向推进器水动力性能计算的数学模型，然后利用有限基本解法、非定常涡格法和赫斯?史密斯方法对全方向推进器定常和非定常状态下的数学模型进行了数值离散，接下来针对前面所设计的全方位推进器进行了数值预报。 - 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。 - In lifting - surface theory , the non - liner phenomena of the trailing vortex in the transition wake area and of the tip vortex separation are considered . in surface panel method hyperboloidal quadrilateral panels are employed and the morino ' s analytical formulation is used to determine the influence coefficients . the more reasonable pressure kutta condition is satisfied at the trailing edge of propeller blade
在计算中，对于升力面理论，本论文考虑了过渡区尾涡收缩和叶梢分离的非线型现象的影响；对于面元法，本论文采用的是计算较为简便的基于扰动速度势的基本公式及双曲面形状的面元，在桨叶随边满足更趋合理的压力kutta条件，并用morino导出的解析公式计算面元的影响系数的快速有效的数值预报方法。 - Based on the theory of potential flow , steady lifting - surface theory and the potential based low - order surface panel methodi the mathematical models for predicting the performance of the hd propeller and mau propeller are respectively established in this paper , and the numerical calculations are also carried out
本文首先基于势流理论和定常螺旋桨的升力面理论，以及基于速度势的低阶面元法理论建立了沪东型( hd )螺旋桨和常规mau图谱桨水动力性能预报的数学模型，并对其进行了数值分析。