水翼后缘水弹耦合实验分析

IF 3.4 2区 工程技术 Q1 ENGINEERING, MECHANICAL Journal of Fluids and Structures Pub Date : 2024-01-23 DOI:10.1016/j.jfluidstructs.2024.104078
P. François , J.A. Astolfi , X. Amandolèse
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引用次数: 0

摘要

本文探讨了夹在流体力学隧道中的 NACA0015 铝质水翼产生音调噪声的流体弹性后缘振动的条件。测试的雷诺数 Re 从 2×105 到 12×105,攻角 α 从 0 到 10°。激光测振仪被用来描述水翼的振动响应。时间分辨粒子图像测速仪(TR-PIV)用于仔细研究水动力激励机制的起源。在雷诺数为 4≤α≤8.5° 的中等攻角条件下,观察到具有显著振幅的水弹性后缘振动,压力侧边界层过渡位于后缘附近,其频率特征允许锁定水翼后缘结构模式。测试了两种被动解决方案来减轻这种由水弹流引起的振动:截断式水翼和触发式水翼。截断配置会对振动产生轻微影响,而在后缘前方触发压力侧边界层转换可消除后缘振动,对水翼流体动力学性能的影响可忽略不计。
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Experimental analysis of trailing edge hydroelastic coupling on a hydrofoil

This paper explores the conditions for hydroelastic trailing edge vibrations generating tonal noise on a NACA0015 aluminium hydrofoil clamped in a hydrodynamic tunnel. Tests were performed for Reynolds numbers Re, ranging from 2×105 up to 12×105 and various angles of attack α, from 0 up to 10°. A laser vibrometer was used to characterize the hydrofoil vibratory response. Time Resolved Particle Image Velocimetry (TR-PIV) was used to scrutinize the origin of the hydrodynamic excitation mechanism. Hydroelastic trailing edge vibrations of significant amplitude were observed at moderate angles of attack 4α8.5°, for Reynolds number such that the pressure side boundary layer transition was located close to the trailing edge, with a frequency signature allowing a lock-in with the hydrofoil trailing edge structural mode. Two passive solutions were tested to mitigate this hydroelastic flow-induced vibration: a truncated hydrofoil and a triggered one. The truncated configuration slightly impacts the vibration while triggering the pressure side boundary layer transition ahead of the trailing edge eliminates the trailing edge vibrations with negligible impact on the hydrofoil hydrodynamics performances.

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来源期刊
Journal of Fluids and Structures
Journal of Fluids and Structures 工程技术-工程:机械
CiteScore
6.90
自引率
8.30%
发文量
173
审稿时长
65 days
期刊介绍: The Journal of Fluids and Structures serves as a focal point and a forum for the exchange of ideas, for the many kinds of specialists and practitioners concerned with fluid–structure interactions and the dynamics of systems related thereto, in any field. One of its aims is to foster the cross–fertilization of ideas, methods and techniques in the various disciplines involved. The journal publishes papers that present original and significant contributions on all aspects of the mechanical interactions between fluids and solids, regardless of scale.
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