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首页> 外文期刊>Journal of Fluid Science and Technology >Numerical and experimental studies of a small vertical-axis wind turbine with variable-pitch straight blades
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Numerical and experimental studies of a small vertical-axis wind turbine with variable-pitch straight blades

机译：变节距直叶片小型垂直轴风力发电机的数值与实验研究

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This paper presents a numerical simulation and experiment on the effect of the variable pitch angle on the performance of a small vertical-axis wind turbine (VAWT) with straight blades. The power coefficient of the VAWT was measured in an open-circuit wind tunnel. By conducting two-dimensional unsteady computational fluid dynamics simulations using the RNG k -ε , Realizable k -ε , and SST k -ω models, the power and torque of the VAWT and the flow around the straight blades were also analyzed. The numerical simulation of the power performance results were validated using wind tunnel experimental data. The results of both the numerical simulations and experiments showed that a VAWT with variable-pitch blades has better performance than a VAWT with fixed-pitch blades. The numerical simulation of the performance using the RNG k -ε turbulence model had good qualitative agreement with the experimental results. The numerical simulation was able to capture the flow separation on a blade, and it was shown that a variable-pitch blade can suppress the flow separation on its blades at a tip speed ratio lower than that of fixed-pitch blades.
机译：本文对变桨距角对带有直叶片的小型垂直轴风力涡轮机（VAWT）的性能进行了数值模拟和实验。在开路风洞中测量VAWT的功率系数。通过使用RNG k-ε，可实现的 k-ε和SST k-ω模型进行二维非定常计算流体动力学模拟，功率和还分析了VAWT的扭矩和直叶片周围的流动。利用风洞实验数据验证了功率性能结果的数值模拟。数值模拟和实验结果均表明，可变螺距叶片的VAWT比固定螺距叶片的VAWT具有更好的性能。使用RNG k-<ε>ε湍流模型进行的性能数值模拟与实验结果具有良好的定性一致性。数值模拟能够捕获叶片上的流分离，结果表明，可变螺距叶片能够以低于固定螺距叶片的叶尖速度比抑制叶片上的流分离。

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