不稳定的CFD模拟各种风条件下的旋翼叶片
Sa Kasmaiee1, Si Kasmaiee2, A Farshad3
1Department of Aerospace Engineering, Amirkabir University of Technology, Tehran, Iran.
Scientific reports
|August 19, 2024
概括
这项研究使用计算流体动力学 (CFD) 分析了各种风条件下的旋翼叶片性能. 结果揭示了风向和风速如何影响推力和扭矩,为轮设计提供了洞察力.
科学领域:
- 空气动力学 在空气动力学.
- 轮机的机械设备
- 计算流体动力学 (CFD) 是一种计算流体动力学.
背景情况:
- 风和风暴显著影响旋转机和轮机的性能.
- 过渡转子的行为需要仔细检查,以准确的性能分析.
研究的目的:
- 在不同的风条件下 (方向,速度,角度) 调查旋翼叶片不稳定的空气动力学特性.
- 使用3D短暂CFD模拟分析转子动力学.
主要方法:
- 采用动态网格技术的3D瞬态计算流体动力学 (CFD).
- 解决了使用k-ω SST流模型的不稳定的雷诺兹-平均纳维埃-斯托克斯 (URANS) 方程.
- 使用了U15XXL Combo KV29工业刀片,这是数值分析的新课题.
主要成果:
- 逆风比侧面或相反的风能减少推力.
- 侧风低于5米/秒的性能降低;更高的速度提高它,导致独特的扭矩曲线形状 (蝶翼).
- 侧面角导致空间推力转移,推力随着接近相反的旋转方向而减少.
结论:
- 风的方向和速度极大地影响了旋转器的推力和扭矩.
- 侧向风的影响取决于速度,高速度产生复杂的扭矩模式.
- 侧向角度主要导致推力的空间转移,而不是平均减小,并且可以在特定的角度稳定运动.
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