Analysis of Wake Turbulence for a Savonius Turbine for Malaysia’s Slow-Moving Current Flow

IF 2.4 Q3 ENERGY & FUELS
Anas A. Rahman, Kumaran Rajendran, Ayu Abdul-Rahman, G. E. Suhri, L. Dass
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引用次数: 1

Abstract

With Malaysia being surrounded by water bodies, tidal energy could be used for energy extraction. While several turbine designs and technologies have been used for tidal energy extraction, information on the use of vertical-axis tidal turbines (VATTs) for shallow-water applications is scarce. However, implementing horizontal-axis tidal turbines (HATTs) is not feasible due to Malaysian ocean depths. Hence, examining the wake-flow characteristics of VATTs in a shallow water-working environment in Malaysia is essential. The wake turbulence of the Savonius turbine model was compared with that of a hypothetical ‘actuator' cylinder, a VATT representation. Subsequently, the wake turbulences of a Savonius turbine model in static and dynamic simulations were compared to understand the flow distinction. Compared with that exhibited by the hypothetical actuator cylinder of 2.5 m, the hypothetical actuator cylinder of 5 m exhibits greater velocity deceleration. Additionally, the modelled Savonius turbine exhibits significantly more deceleration than that exhibited by the hypothetical actuator cylinder. Finally, the analysis of the static model of the Savonius turbine shows deceleration that is greater than that of the dynamic model.
马来西亚慢流Savonius涡轮机尾流湍流分析
由于马来西亚被水体包围,潮汐能可以用于能源开采。虽然潮汐能提取已经使用了几种涡轮机设计和技术,但关于将垂直轴潮汐涡轮机(VATT)用于浅水应用的信息很少。然而,由于马来西亚的海洋深度,实施水平轴潮汐涡轮机(HATT)是不可行的。因此,研究VATT在马来西亚浅水工作环境中的尾流特性至关重要。将Savonius涡轮机模型的尾流湍流与假设的“致动器”气缸(VATT表示)的尾流紊流进行了比较。随后,对Savonius涡轮机模型在静态和动态模拟中的尾流湍流进行了比较,以了解流量差异。与假设的2.5 m执行器气缸相比,假设的5 m执行器汽缸表现出更大的速度减速度。此外,建模的Savonius涡轮机比假设的执行器气缸表现出的减速明显更多。最后,对Savonius涡轮机静态模型的分析表明,减速度大于动态模型的减速度。
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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来源期刊
CiteScore
4.50
自引率
16.00%
发文量
83
审稿时长
8 weeks
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