Influence of overlap ratio and aspect ratio on the performance of Savonius hydrokinetic turbine
Influence of overlap ratio and aspect ratio on the performance of Savonius hydrokinetic turbine
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DOI：
10.1002/er.3670
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发表时间：
2017-05-01
影响因子：
4.6
通讯作者：
Prabhu, S. V.
中科院分区：
文献类型：
--
作者：
Patel, Vimal;Bhat, Ganapathi;Prabhu, S. V.
水力发电的有力竞争者是萨伏纽斯水轮机，因为它具有良好的启动特性和制造简单。本文的目的是研究重叠比和展弦比对萨伏纽斯水轮机水动力性能的影响。研究结果对确定萨沃纽斯水轮机的设计参数有一定的参考价值。本研究在三个明渠中进行，分别是水深270mm的小型实验室通道、水深480mm的大型实验室通道和水深900mm的现实灌溉渠。研究了端板的存在对转子性能的影响。最大功率系数被观察到的重叠比约为0.11的Savonius涡轮机，展弦比小于0.6。在一定的重叠比下，功率系数随长径比的增大而增大。然而，当宽高比大于1.8时，功率系数几乎停滞不前。版权所有：John Wiley & Sons， Ltd。
A strong contender for the utilization of the hydropower sources is Savonius turbine because of its good starting characteristics and simplicity in fabrication. The aim of the present work is to study the effect of overlap ratio and aspect ratio on the performance of a Savonius turbine for hydrodynamic application. The findings would be useful to decide design parameters of a Savonius hydrokinetic turbine. This study is conducted in three open channels namely small laboratory channel with depth of water 270mm, large laboratory channel with depth of water 480mm and a real life irrigation canal with depth of water 900mm. Influence of endplates is studied to establish the significance of their presence on rotor performance. Maximum coefficient of power is observed for an overlap ratio of around 0.11 for Savonius turbines with aspect ratio less than 0.6. For a given overlap ratio, the increasing trend of the coefficient of power is observed with the increase in the aspect ratio. However, for aspect ratios greater than 1.8, the coefficient of power becomes nearly stagnant. Copyright (C) 2016 John Wiley & Sons, Ltd.