利用人工神经网络对萨沃尼斯水动力涡轮机的新型设计进行优化和参数分析

IF 10.1 1区 工程技术 Q1 ENERGY & FUELS
Shehab Osama , Hamdy Hassan , Mohamed Emam
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引用次数: 0

摘要

这项研究的重点是提高为海洋应用设计的垂直轴萨沃纽斯动能水轮机的效率,其功率系数历来低于 0.1。之前旨在提高转子性能的努力主要涉及对叶片设计的修改。本文介绍了一种新方法,它采用了受阿基米德螺旋涡轮机启发的扭曲叶片。这项研究利用基于纳维-斯托克斯方程的三维不可压缩流动分析,探索并比较了不同螺距(0.5、0.75、1)下涡轮机的效率。方程组使用 ANSYS 2020 R2 流体流畅器进行数值求解。性能评估包括将每个拟议转子与无螺距半圆转子进行对比。这项工作的创新之处在于利用两种不同的比例(2:1 和 3:1)来研究不对称的影响。具体来说,最佳螺距螺杆的下半部分保持不变,而上半部分则根据这些比率而变化。为了解性能趋势,研究采用了压力、速度等值线和流线的可视化方法来掌握流场及其基本原理。湍流动能和涡流粘度也被可视化。结果表明,采用螺距为 0.5 的拟议转子后,性能提高了 18.25%。值得注意的是,螺距比为 2:1 的不对称转子性能最高。根据方差网络,最佳螺距值为 0.6,功率系数达到 0.1938。这项研究采用了新颖的设计修改和非对称配置,为显著提高萨沃纽斯涡轮机在海洋应用中的性能提供了宝贵的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Optimization and parametric analysis of a novel design of Savonius hydrokinetic turbine using artificial neural network
This study focuses on enhancing the efficiency of vertical axis Savonius Hydrokinetic turbines designed for marine applications, historically characterized by a power coefficient below 0.1. Prior efforts aimed at improving rotor performance have primarily involved modifications to blade designs. In this article, a new approach is introduced, incorporating twisted blades inspired by the Archimedes screw turbine. Utilizing a 3D incompressible flow analysis based on the Navier-Stokes equation, this research explores and compares the turbine's effectiveness with varying screw pitches (0.5, 0.75, 1). The system of equations is solved numerically using ANSYS 2020 R2 fluid fluent. The performance assessment involves contrasting each proposed rotor against a pitchless semi-circle rotor. An innovative aspect of this work involves investigating the impact of asymmetry using two different ratios (2:1 and 3:1). Specifically, the lower half of the optimal pitch screw remains constant, while the upper half varies based on these ratios. To understand performance trends, the study employs visualizations of pressure, velocity contours, and streamlines to grasp the flow field and its underlying principles. Turbulent kinetic energy and eddy viscosity are also visualized. The results reveal an 18.25 % improvement in performance with the proposed rotor featuring a pitch screw of 0.5. Notably, the asymmetric rotor with a 2:1 ratio demonstrates the highest performance. According to the ANN, the optimum pitch screw value is determined to be 0.6, achieving a power coefficient of 0.1938. This investigation employs novel design modifications and asymmetrical configurations, offering valuable insights into significantly enhancing the performance of Savonius turbines for marine applications.
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来源期刊
Applied Energy
Applied Energy 工程技术-工程:化工
CiteScore
21.20
自引率
10.70%
发文量
1830
审稿时长
41 days
期刊介绍: Applied Energy serves as a platform for sharing innovations, research, development, and demonstrations in energy conversion, conservation, and sustainable energy systems. The journal covers topics such as optimal energy resource use, environmental pollutant mitigation, and energy process analysis. It welcomes original papers, review articles, technical notes, and letters to the editor. Authors are encouraged to submit manuscripts that bridge the gap between research, development, and implementation. The journal addresses a wide spectrum of topics, including fossil and renewable energy technologies, energy economics, and environmental impacts. Applied Energy also explores modeling and forecasting, conservation strategies, and the social and economic implications of energy policies, including climate change mitigation. It is complemented by the open-access journal Advances in Applied Energy.
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