在水平轴风力轮机中对沙子侵蚀率的数值研究
A E Abu El-Maaty1, H K Abdallah1, M A Kotb1
1Mechanical Engineering Department, KFUPM, Dhahran, 31261, Saudi Arabia.
Heliyon
|April 1, 2024
概括
这项研究从数值上研究了风力轮机叶片的性能和沙子侵蚀. 结果显示,最佳条件提高了轮机的效率,同时揭示了侵蚀模式,并预测了随着时间的推移,叶片的显著退化.
科学领域:
- 可再生能源可再生能源是可再生能源.
- 空气动力学 航空动力学
- 部落学 (tribology) 是一个学科.
背景情况:
- 可再生能源对于减少碳足迹和应对能源挑战至关重要.
- 由于沙子侵蚀造成的风力轮机叶片退化显著影响性能和寿命.
- 最大限度地提高能源产量和确保基础设施的寿命是关键的研究领域.
研究的目的:
- 以数值分析小规模水平轴风力轮机 (SS-HAWT) 的性能和沙子侵蚀.
- 研究沙粒特征和空气速度对轮叶片侵蚀的影响.
- 提供有关风力轮机叶片瞬间和预测侵蚀率的见解.
主要方法:
- 在使用叶片元素动量理论对三维E216气翼叶片 (半径0.5米) 进行了数值研究.
- 模拟涉及不同质量流速 (0.0010.003公斤/秒) 和直径 (50200微米) 的沙粒.
- 模拟了两个平均空气速度 (8 m/s和10 m/s),以评估侵蚀和性能.
主要成果:
- 随着流量分离的转移,风力轮机的性能得到了改善,其最佳尖端速度比为大约5在8m/s,产生0.432.3的功率系数.
- 沙地侵蚀导致刀片前边附近的V形痕.
- 即时侵蚀率随着尖端速度比率的增加而呈指数级增加.
结论:
- 优化操作条件可以提高风力轮机的性能.
- 沙地侵蚀是影响风力轮机叶片的重要因素,具有可预测的模式和速度.
- 在特定叶片位置的最佳操作条件下,预计每年最大侵蚀深度为5.7毫米/年.
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