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首页> 外文会议>AIAA SciTech forum;ASME wind energy symposium >Turbulent wind field characterization and re-generation based on pitot tube measurements mounted on a wind turbine
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Turbulent wind field characterization and re-generation based on pitot tube measurements mounted on a wind turbine

机译：基于安装在风力涡轮机上的皮托管的湍流风场表征和再生

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This paper describes a new method to estimate the undisturbed inflow field of a wind turbine based on measurements obtained from one or more five-hole pitot tubes mounted directly on the blades. Based on the measurements, the disturbance caused by the wind turbine is estimated using aerodymanic models that compensate for axial and tangential induction, approximated by blade element momentum theory, radial expansion of the inflow, rotor tilt, dynamic and skew inflow, tip loss, as well as braking and circulation of the flow local to the airfoil. The wind speeds measured on the rotating blades give a better estimate of the turbulence intensity over the rotor plane than can be measured at a single point, e.g. using a cup anemometer, and in addition the wind shear profile can be derived. In addition the measurements can be used to constrain a synthetic turbulence model to exactly produce the measured wind speeds at the recording position. In the theoretical part of this study a quite good agreement is seen between load sensors on a turbine model exposed to the reference and the re-generated turbulence field. Finally the method is applied to full scale measurements and reasonable wind shear profiles are derived. It is expected that this method will lead to a new and effective experimental method to characterize the incoming flow field to a wind turbine and thus contribute to the understanding of wind turbine loads.
机译：本文介绍了一种基于从直接安装在叶片上的一个或多个五孔皮托管获得的测量值来估算风力涡轮机不受干扰的入流场的新方法。根据测量结果，使用风速模型估算由风力涡轮机引起的扰动，该模型可补偿轴向和切向感应，该近似值由叶片单元动量理论近似，入流的径向膨胀，转子倾斜，动态和偏斜入流，叶尖损失，以及机翼局部气流的制动和循环。在旋转叶片上测得的风速比在单个点（例如，风速）上可以更好地估计出转子平面上的湍流强度。使用杯型风速计，此外，还可以导出风切变曲线。另外，测量结果可用于约束合成湍流模型，以在记录位置精确产生测得的风速。在本研究的理论部分，可以看到暴露在参考下的涡轮机模型上的负载传感器与再生湍流场之间的良好一致性。最后，将该方法应用于满量程测量，并得出合理的风切变曲线。期望该方法将导致一种新的有效的实验方法，以表征进入风力涡轮机的流场，从而有助于理解风力涡轮机的负荷。

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