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数字建模和CFD模拟扩散器增强双垂直轴水动力学班基-米歇尔轮机的数值建模和CFD模拟
Nebiyu Bogale Mereke1,2, Venkata Ramayya Ancha1, Patrick Hendrick2
1Faculty of Mechanical Engineering, Jimma University Institute of Technology, Jimma, 378, Ethiopia.
Heliyon
|March 12, 2024
概括
这项研究介绍了一种创新的垂直Banki轮机设计,用于超低头液动力学能量. 扩散器的增强显著提高了跑步者的速度和效率,使其成为一个可行的可再生能源解决方案.
科学领域:
- 可再生能源工程可再生能源工程
- 流体力学 流体力学 流体力学
- 轮机设计设计 轮机设计
背景情况:
- 水力动力学班基轮机提供了一个负担得起的,环保的能源解决方案.
- 传统的班基轮机需要昂贵的基础设施,这限制了它们的应用.
- 在现有运河中探索垂直班基轮机设计的超低头 (ULH) 应用.
研究的目的:
- 调查ULH应用新型垂直班基轮系统的性能提升.
- 分析喷嘴和扩散器增强对跑步者的速度,压力和功率输出的影响.
- 优化轮设计,包括叶片数量和喉宽度,使用计算流体动力学.
主要方法:
- 利用3D ANSYS-FLUENT模拟来建模和优化垂直的班基轮机.
- 研究了两个配置:喷嘴增强系统和喷嘴扩散器增强系统.
- 分析了这些增强对关键性能参数,如旋转速度和功率的影响.
主要成果:
- 标准的垂直班基轮机在ULH应用中实现了344rpm的低于最佳转速.
- 喷嘴增速提高到每分钟850转,而喷嘴扩散器增速达到每分钟1025转.
- 与非扩散器设计相比,扩散器组件的性能提高了7.6%.
- 经过优化设计,每个跑步者有19个刀片和202毫米的喉宽度.
- 模拟结果与双水平轴班基轮机的现有数据有很好的一致性.
结论:
- 增强的垂直班基轮机设计,特别是扩散器增强,显著提高ULH水力动能的运行速度和效率.
- 这种创新的配置提供了一个具有成本效益和技术可行的可再生能源技术.
- 优化的设计参数为进一步开发和部署这种轮机类型提供了坚实的基础.
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