Characteristics of Hydrodynamic Forces and Torque on Darrieus Type Water Turbines for Current Power Generation Systems with CFD Computations

T. Ikoma, K. Masuda, S. Fujio, H. Nakada, H. Maeda, C. Rheem
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引用次数: 6

Abstract

This paper describes the drag coefficient and the lift coefficient of Darrieus type turbines, and also discusses accuracy of numerical calculations of Darrieus type water turbines with computational fluid dynamics (CFD) comparing with some results of model experiments by us. Corresponding Darrieus turbines are a vertical blade type. Objectives of this study are to investigate follows: 1) characteristics of hydrodynamic forces on a fixed blade with several attack angles, 2) characteristics of hydrodynamic forces and torques of fixed three blades, 3) rotation characteristics of the turbine without restoring loads and 4) the above things are confirmed and discussed with model experiments and CFD computations. Finally a method to improve the torque performance is investigated with optimization of attaching angles of blades. From the results, it is confirmed that CFD computations are useful and it is possible to improve torque performance with the blade element and the momentum combined theory.
当前发电系统中Darrieus型水轮机水动力和扭矩特性的CFD计算
本文介绍了Darrieus型水轮机的阻力系数和升力系数,并讨论了计算流体力学(CFD)对Darrieus型水轮机数值计算的准确性,并与我们的一些模型实验结果进行了比较。相应的Darrieus涡轮机是垂直叶片型。本研究的目的是:1)不同攻角的固定叶片上的水动力特性,2)固定三片叶片的水动力和扭矩特性,3)不恢复载荷时涡轮的旋转特性,4)通过模型实验和CFD计算对以上内容进行确认和讨论。最后研究了通过优化叶片附着角来提高叶片转矩性能的方法。结果表明,CFD计算是有效的,利用叶片单元和动量组合理论可以提高叶片的转矩性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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