风力机

The shear stress and tensile stress were increased obviously in the place of 388mm to centre of gyration of wind rotor comparing with other section where the phenomenon of stress concentration had for 1.5MW blade model.

在风速为14.6m/s时，1.5MW叶片模型风力机风轮转速达到400 rpm，但风轮风能利用系数为0.062，表明兆瓦级叶片模型与100W风力发电机不匹配。

In our country, the efficiency of the use of the wind turbine is comparably subjacent. So in order to handle it well we must accelerate the research of them.

在我国对于风力机的利用率较低，为了更好的利用风力资源就必须加速对它的研究。

High efficiency, dependability, little maintenance and big freedom between wind turbine and water pump are system's main characteristics.

风力发电泵水系统的主要特点是提水效率高、可靠性高、系统维护量少且风力机与水泵之间的安装位置自由度大等。

To analyze the aerodynamics performance of a wind turbine blade, the viscous fluid 2-D calculating model is used. The characteristics of a wind turbine, a fluid pump, and a throttle are analyzed.

并在实验与数值计算的基础上，分析了风力机，流体升压泵，节流器的特性，还对联机构成风力致热系统时的性能匹配与变工况特性进行了分析研究。

Airfoil profiles for wind turbines are mostly chosen from aviatic ones,but design requirements between the two types are different in many aspect.

风力机翼型主要选自航空翼型，但风力机翼型与航空翼型的设计要求存在许多的不同之处，所以，基于初始航空翼型以获得适合风力机的翼型的优化设计工作就显得十分重要。

With the wind turbine becoming large, the fatigue problem of the components in wind turbines is increasedly important .

随着风力发电机的大型化，风力机结构疲劳寿命问题日益突出。

To get the biggest power coefficient at various of wind speed, put out the argument of controlling wind turbine according to the wind pressure which act on the wind wheel swept area. Design and make a wind turbine which can adjust pitch angle of oar leaves through various of wind speed, and make experiment of characteristic.

1引盲 传统的风力机优化设计方法是以桨叶各截面在设计风速处具有最大的功率系数为目标，设计是针对事先确定的一个设计风速进行的，风力机只能在设计风速点处获得最大功率系数。

Analyses characteristics of the wind turbine and ventilation fan for underground engineering, and discusses the matching scheme with a wind turbine as power supply. Verifies the scheme with calculation examples.

通过对风力机和地下工程用通风机特性分析，讨论了利用风力机作为动力源驱动通风机对地下工程进行通风的匹配方法。

The semi-rigid wake model and the present calculation method were used to study two wind turbines in the wind tunnel, it was concluded that the results were closer to experiment data than that from the element/momentum theory, and aerodynamic performance of HAWT can be analyzed precisely, in particular, in the range of high tip speed ratio.

对两个风洞中实验的风力机模型进行了计算，结果表明，利用所给出的模型和计算方法比叶素/动量理论更加接近实验数据，并且在较大尖速比范围内可精确地分析水平轴风力机的空气动力特性。

During a low speed, the pitch angle is a constant, wind turbines keep on the optimum speed ratio between the pitch and wind so as to absorb the maximum energy.

该风力机在低风速时桨距角不变，保持最佳叶尖速比以获得最大风能；在高风速时储存或释放部分能量，桨距角仅完成限制最大输出功率，减少机械应力，风能储存在风力机机械惯性中，减少力矩冲击。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。