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首页> 外文期刊>Energy >Effect of turbulent inflows on airfoil performance for a Horizontal Axis Wind Turbine at low Reynolds numbers (part I: Static pressure measurement)
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Effect of turbulent inflows on airfoil performance for a Horizontal Axis Wind Turbine at low Reynolds numbers (part I: Static pressure measurement)

机译：低雷诺数时湍流流入对水平轴风力涡轮机翼型性能的影响（第一部分：静压力测量）

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This paper presented the results of a study to investigate the effect of turbulent inflows on the blade performance of a Horizontal Axis Wind Turbine (HAWT) by employing the experimental measurement at low Reynolds numbers. In order to observe the stall phenomenon, pressures on the rotor surface were measured by a multiport pressure device. Furthermore, for understanding the effects of different turbulence intensities on the aerodynamic performance characteristics of HAWT airfoil, static turbulence grids were used to adjust the turbulence intensity in wind tunnel. In this experiment, aerodynamic forces were discussed with different turbulence intensities and low Reynolds numbers. From comparing the results, it was found that the flow was separated at the leading edge in the case of without grids. On the other hand, in the case of turbulent flow field (with grids), the flow separated region was expanded gradually with the increase of the angle of attack. In the case of Re >= 1.5 x 10(5), compared with the low turbulence intensity, the lift coefficient was increased significantly at the high turbulent flow field. In addition, the drag coefficient in the turbulent flow field was reduced as compared to the low turbulence. (C) 2016 Elsevier Ltd. All rights reserved.
机译：本文介绍了一项研究结果，通过采用低雷诺数下的实验测量来研究湍流流入对水平轴风力涡轮机（HAWT）叶片性能的影响。为了观察失速现象，通过多端口压力装置测量转子表面上的压力。此外，为了解不同湍流强度对HAWT翼型气动性能特性的影响，使用静态湍流栅格来调整风洞中的湍流强度。在该实验中，讨论了不同湍流强度和低雷诺数的空气动力。通过比较结果，发现在没有网格的情况下，流在前缘处被分离。另一方面，在湍流场（带有网格）的情况下，流动分离区域随着迎角的增加而逐渐扩大。在Re> = 1.5 x 10（5）的情况下，与低湍流强度相比，在高湍流流场下升力系数显着增加。另外，与低湍流相比，湍流场中的阻力系数减小了。 （C）2016 Elsevier Ltd.保留所有权利。

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