张伟1,2, 聂旭涛2, 欧李苇2, 夏智勋1, 陈磊1(
)
收稿日期:2023-11-07
修回日期:2023-12-11
接受日期:2024-02-01
出版日期:2024-09-25
发布日期:2024-02-23
通讯作者:
陈磊
E-mail:chenl@nudt.edu.cn
基金资助:
Wei ZHANG1,2, Xutao NIE2, Liwei OU2, Zhixun XIA1, Lei CHEN1(
)
Received:2023-11-07
Revised:2023-12-11
Accepted:2024-02-01
Online:2024-09-25
Published:2024-02-23
Contact:
Lei CHEN
E-mail:chenl@nudt.edu.cn
Supported by:摘要:
变体机翼是提高飞行器机动性能、高升低阻,满足复杂多变工况的重要解决途径之一,探索机翼变形对流场的影响机制是变形控制的基础。针对后缘拍动的柔性变体机翼,为准确分析拍动影响机制,提出了频率加权排序的动力学模态分解方法。针对不同工况下数值模拟结果或试验数据,开展了频率加权法同常规初始值、模态范数排序方法的对比。结果显示频率加权法得到的2阶模态频率与拍动频率吻合,表明该方法能准确体现机翼后缘周期性拍动对流场结构影响,反映机翼变形对尾迹的破碎作用。在相同重构模态数量下,拍动频率为300.0 Hz时,基于数值模拟数据,频率加权法、初始值法、模态范数法重构的速度场误差分别为0.39%、0.58%、3.25%,基于粒子图像测速设备(PIV)试验数据的误差分别为7.56%、8.77%、10.56%,表明频率加权法误差最小,能较好用于主动拍动变体机翼的物理场分析及后续反馈控制。
中图分类号:
张伟, 聂旭涛, 欧李苇, 夏智勋, 陈磊. 基于频率加权的后缘拍动变体机翼流场模态分解[J]. 航空学报, 2024, 45(18): 129846.
Wei ZHANG, Xutao NIE, Liwei OU, Zhixun XIA, Lei CHEN. Frequency⁃weighted dynamic mode decomposition for trailing edge flapping airfoil flow[J]. Acta Aeronautica et Astronautica Sinica, 2024, 45(18): 129846.
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