This paper provides a simple yet accurate lower order model for predicting the performance of shrouded wind turbines for a range of shroud airfoil shapes varying in length, camber, and thickness. The model employs classic thin airfoil aerodynamic principals and is an enhancement of a previous related model developed for shrouded propellers. The new method's accuracy is assessed using inviscid and viscous computational studies employing an actuator‐disc representation for the turbine rotor. Detailed comparisons are made for three shrouds over a full range of rotor loadings. For the range of configurations assessed, it was found that the algebraic solutions from the new method provided very good engineering approximations at all operating conditions considered, thereby enabling rapid preliminary design of shrouded power systems. Additionally, the new model is used to establish a Betz‐like power performance limit for airfoil‐based shrouded turbines.

中文翻译：

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基于翼型的带罩风轮机的增强分析模型

本文提供了一个简单而准确的低阶模型，用于预测各种长度，外倾角和厚度变化的带罩翼型形状的带罩风力涡轮机的性能。该模型采用经典的薄型翼型空气动力学原理，是对以前为带罩螺旋桨开发的相关模型的增强。新方法的准确性通过使用粘性和粘性的计算研究来评估，该研究使用了涡轮转子的执行器-盘片表示法。针对整个转子负载范围内的三个护罩进行了详细的比较。对于评估的配置范围，发现新方法的代数解在所考虑的所有工作条件下都提供了很好的工程近似，从而可以快速进行带罩电源系统的初步设计。另外，