桨叶

This paper studies the structural dynamics of the rotor blade of the horizontal axis wind turbine using the modal analysis method.

本文用模态分析的方法研究了水平轴风力机桨叶的结构动力学特性。

So the hydrodynamics of the flow is very important for process design and optimization.

因此，本文从PIV测量和CFD数值模拟两方面对多种桨叶及流型下搅拌槽的流动特性进行深入研究，为其应用基础研究及优化设计提供指导和参考。

The calculation results of three -dimensional velocity distribution of impeller discharge flow roughly meet the experimental results.

计算所得的桨叶排出流的三维速度分布与实验结果大体一致。

The results obtained by these analyses show that the problem of the influence of control system on modal characteristics of the rotor blades torsional vibration is noticeable.

分析结果表明：操纵系统对旋翼桨叶扭转振动固有特性的影响是一个值得注意的问题。

With differential geometry knowledge, the local characters of the blade surface are analyzed. Based on researching the cylindrical cutters osculating location, the methods to calculate the osculating location of the conic cutter and the torus cutter are discussed. A method of tool path planning based on the second order osculating method is preferred.

利用微分几何学知识，分析了螺旋桨桨叶曲面的局部特征，在研究圆柱刀二阶密切法规划刀位的基础上，探讨了圆锥刀和圆环刀的二阶密切刀位计算方法，采用二阶密切法规划刀位可以显著地提高加工精度。

The grid system consists of two overset grids: blade grid and background grid.

由于悬停流场存在旋转对称性，计算只需对一个桨叶进行。

This was tested using a riverboat equipped with a caterpillar paddle wheel.

这个可以通过一艘装备了蠕虫状推进桨叶的船进行测试。

Interestingly, the paddle wheel or propeller style movement creates lift and thrust. In this case lift adds to thrust.

这个很有意思，明轮推水或者桨叶方式的推水产生了上举力和向前的推力，在这种情况下上升力和推力会叠加在一起。

I have my paddle.

我有我的桨叶。

The process of the lift shift for the DCAR and the mode transformation of the high-speed rotorcraft are designed and its feasibility is described.

在对数据进行综合分析的基础上，建立了盘翼/桨叶组合体的气动特性计算方法，从而进行了高速直升机方案升力转移和模式转换的过程设计，计算证明此高速型方案是可行的。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失