ENHANCED PERFORMANCE OF HAWTS USING ADAPTIVE BLADES
ENHANCED PERFORMANCE OF HAWTS USING ADAPTIVE BLADES
复制标题
使用自适应刀片增强轴的性能
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
P. Migliore
中科院分区：
文献类型：
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作者：
D. Lobitz;P. Veers;P. Migliore
随着HAWT开发技术的成熟，正在研究更复杂的技术，以增加每年的能量捕获。一种这样的技术设想使用自适应或智能叶片结构，其可以以某种方式感测风速并相应地修改其空气动力学配置以提高性能。这可以以主动或被动方式实现，尽管被动方法由于其简单和经济而更具吸引力。作为示例，叶片设计可以采用挥舞弯曲、延伸和扭转之间的弹性耦合，使得当其由于空气动力学和惯性载荷的作用而弯曲和延伸时，其也以促进失速的方式扭转。由于过早失速条件，叶片的长度可以增加，而不会使齿轮箱或发电机过载，从而导致能量捕获的增加。这项工作包括一项可行性研究，重点是空气动力学性能计算，其中叶片几何形状是人为重新配置为风速的函数。这些计算确定了年能量捕获增加5- 10%所需的重新配置的范围。结果表明，这种幅度的增加可以通过适度的叶片扭转（2度）来实现。后续工作将调查这些重新配置的设计可行性和制造选定概念的方法。«少
As the technology for HAWT development matures, more sophisticated techniques are being examined to increase annual energy capture. One such technique envisages the use of an adaptive or smart blade structure that could sense the wind velocity in some fashion and accordingly modify its aerodynamic configuration to improve performance. This could be achieved in either an active or passive manner, although the passive approach is much more attractive due to its simplicity and economy. As an example, a blade design might employ elastic coupling between flapwise bending, extension and twisting so that, as it bends and extends due to the action of the aerodynamic and inertial loads, it also twists in a manner to promote stall. Because of the premature stall condition, the length of the blade could be increased without overpowering the gearbox or generator, leading to an increase in energy capture. This work encompasses a feasibility study that focuses on aerodynamic performance computations wherein the blade geometry is artificially reconfigured as a function of wind speed. These computations identify the scope of the reconfigurations required for a 5--10 percent increase in annual energy capture. Results show that increases of this magnitude can be achieved with a modest amountmore » of blade twist (2 degrees). Follow-on work will investigate the design achievability of these reconfigurations and methods for fabricating selected concepts.« less