风力轮机应用的NACA0021尾行边的初步评估
Asmail A M Abdalkarem1, Roaa Ansaf2, Wan Khairul Muzammil3
1Solar Energy Research Institute (SERI), University Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia.
Heliyon
|November 9, 2023
概括
鱼尾 (Fish wedge tails,FWT) 通过增加41%以上的升力和超过31%的滑翔比率,显著提高了气翼性能. 这些空气动力学改进是在NACA 0021气翼上以最佳的FWT尺寸实现的.
科学领域:
- 航空航天工程 航空航天工程
- 可再生能源技术可再生能源技术
- 流体动力学 流体动力学
背景情况:
- 风力轮机叶片的效率对于能源转换至关重要.
- 探讨气翼修改以改善空气动力学特性并减少大气边界层相互作用.
- 尾 (WTs) 被研究为气翼尾边的新型修改.
研究的目的:
- 为了评估安装形尾巴 (WTs) 和鱼形尾巴 (FWTs) 在NACA 0021气翼的尾边的空气动力学好处.
- 确定最优的形长度 (L) 与形高度 (H) 的比率 (L/H),以最大限度地提高气翼的滑翔比率 (CL/CD).
- 在相同的配置下,将FWT与Gurney的性能进行比较.
主要方法:
- 计算流体动力学 (CFD) 模拟使用剪切应力传输 (SST) k-ω流模型进行.
- 这项研究分析了具有各种WT和FWT配置的2D稳定状态NACA 0021气形状.
- 不同的L/H比 (L/H > 1,L/H = 1,L/H < 1) 在180,000的雷诺兹数下进行了研究.
主要成果:
- 气翼性能对尾部高度敏感,当L/H < 1时,长度对尾部高度有很小的影响.
- 与清洁的气翼相比,安装的FWT导致升力 (超过41%) 和滑翔比率 (超过31%) 的大幅增加.
- 在FWT高度为2.5%和气翼弦长度为1%的情况下,可以达到最佳性能.
- 在相同的配置下,FWT在Gurney板上表现出优越的性能.
结论:
- 鱼尾是一种有效的修改,可以提高气翼的空气动力学性能,特别是升空和滑翔比率.
- 尾巴的高度是一个比它的长度更关键的参数,用于性能优化.
- 在风力轮机应用中,FWT为现有的气改造提供了有希望的替代方案,例如Gurney门.
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