使用CFD分析对空扩散器风力轮机的几何参数和形状进行参数研究
Debela Alema Teklemariyem1, Eshetu Tadesse Yimer1, Venkata Rammaya Ancha2
1Jimma Insitute of Technology, Thermal Energy Systems, P.O.Box 378, Jimma, Ethiopia.
Heliyon
|March 8, 2024
概括
优化风力轮机扩散器可以显著提高空气流量. 特定的角度和侧翼设计增加了82.9%的流速和102.66%的速度,从而提高了风能捕获.
科学领域:
- 可再生能源工程可再生能源工程
- 空气动力学 在空气动力学.
- 流体力学 流体力学 流体力学
背景情况:
- 扩散器用于增加风力轮机的功率输出.
- 之前的研究并没有彻底评估各种扩散器形状和角度.
- 缺少对空扩散器3D几何参数的全面分析.
研究的目的:
- 为了确定空扩散器的最佳3D几何参数和形状.
- 为了提高水平轴风力轮机 (HAWT) 旋翼平面的质量流速和速度.
- 分析扩散器角度,侧边尺寸和形状对空气动力学性能的影响.
主要方法:
- 扩散器几何形状的详细参数研究,包括开口角度 (2°-22°),进口罩角度 (8°-24°),侧翼高度比率和侧翼角度 (0°,15°).
- 计算流体动力学 (CFD) 模拟是在4.5米/秒的风速下进行的.
- 对CFD结果与现有文献中的实验数据进行验证.
主要成果:
- 通过24°的入口 - 覆盖面角,8°的开口角,以及0.3.3的边缘高度 - 喉直径比,实现了82.9%的流量增加.
- 一个渐进的边缘设计导致最大和平均速度分别增加了102.66%和82.2%.
- 该研究报告说,速度增加了92.61%,明显超过了之前的发现.
结论:
- 最佳的扩散器几何形状,特别是入口罩和开口角度,大大提高了HAWT的性能.
- 理想的轮安置位置被确定在离扩散器入口0.175米处.
- 为实践应用,建议进行进一步的集成系统模拟和现场测试.
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