从非定常流动，计算远场声音。From unsteady flow to far-field sound.
将气动声学方法转化为可使用的软件：基于 FW-H 方程预测非定常流动产生的声辐射。Turning aeroacoustic methods into usable software, with FW-H prediction of sound radiated by unsteady flows.
了解软件与使用入口Explore the software ↗01研究RESEARCH
于流动深处，探声音之源。 Within the flow, we seek the source of sound.
围绕低空飞行器与推进噪声，我们结合高保真计算、复杂流动机理与气动声学实验，研究声音的产生、传播和控制。We study low-altitude aircraft and propulsion noise through computational methods, complex-flow mechanisms and aeroacoustic experiments, examining how sound is generated, propagates and can be controlled.
研究方向RESEARCH DIRECTION
复杂流动噪声机理与调控Complex-flow Noise Mechanisms & Control
研究阵风、湍流与涡结构如何改变翼型、螺旋桨和绕流结构的非定常载荷、振动与声学响应。通过可控扰动和数值分析识别关键机理，为流动与噪声调控提供依据；不同算例中的振动或流动改善不直接等同于已验证的降噪效果。We investigate how gusts, turbulence and vortices affect unsteady loading, vibration and acoustic response around airfoils, propellers and bluff bodies. Controlled disturbances and simulations reveal mechanisms relevant to future flow and noise control; changes in vibration or flow alone do not establish noise reduction.
研究图像RESEARCH IMAGES
从图像观察流动与声场Flow and sound fields in images
动态可视化IN MOTION
发动机风扇流动结构演化动画Engine-fan flow-structure evolution animation
精选论文SELECTED PUBLICATIONS
从论文了解这一方向Explore the work through selected papers
选取与本方向相关的近期成果；完整论文可在成果页面检索。Recent papers relevant to this direction. Find the full list under Publications.
- 2026Feng Y, McFarland DM, Shao M, Yu J, Jiang H. Vortex-induced vibration and wake modulation of a circular cylinder subjected to harmonic cross-flow perturbations. Ocean Engineering, 2026, 362: 126516. ↗
横向谐波扰动下圆柱涡激振动与尾迹调制Vortex-induced vibration and wake modulation of a circular cylinder subjected to harmonic cross-flow perturbations
Feng Y, McFarland DM, Shao M, Yu J, Jiang H. Vortex-induced vibration and wake modulation of a circular cylinder subjected to harmonic cross-flow perturbations. Ocean Engineering, 2026, 362: 126516.
查看原文View publication ↗本文采用动量源计算框架，参数化研究圆柱在横向谐波扰动下的涡激振动与尾迹演化。扰动强度为自由来流速度的 1%–10%，约化速度从 1.0 扫描至 15.0。研究从振幅、水动力、相位动态及尾迹演化等方面分析不同约化速度区间内的响应。扰动强度的作用随区间显著变化：锁定前区间内，扰动增大振幅并触发尾迹由 2S 向 2P 模式转变；在所给文本缺失的特定条件下发生完全同步，所有测试扰动强度下均保持稳定振幅和 2P 脱涡模式。锁定区间内，结构振动略受抑制，但响应频率仍保持锁定。向失同步过渡时，内禀脱涡与外部扰动竞争使主锁定状态提前终止，形成低振幅分支，且扰动强度越高，外部主导作用越明显。失同步区间内，扰动增强尾迹动力学，并放大脱涡频率处的结构响应。研究阐明了横向扰动对圆柱涡激振动的多重作用，为海洋工程结构疲劳评估及振动控制提供参考。（所给文本中约化速度符号及完全同步条件缺失，待补原文公式。）
Employing a momentum-source computational framework, this study parametrically investigates the vortex-induced vibration (VIV) and wake evolution of a circular cylinder subjected to harmonic cross-flow perturbations with intensities ranging from 1% to 10% of the freestream velocity. The reduced velocity () is swept from 1.0 to 15.0. The perturbation-modulated response across different reduced velocity regimes is analyzed regarding vibration amplitude, hydrodynamic forces, phase dynamics, and wake evolution. The results indicate that the impact of perturbation intensity varies significantly across different reduced velocity regimes. Within the pre-lock-in regime, the perturbation amplifies the vibration amplitude and triggers a wake transition from 2S to 2P patterns. At [value missing in supplied text], full synchronization occurs. Under all tested perturbation intensities, the response maintains robust vibration amplitudes and a stable 2P shedding mode. Within the lock-in regime, although the structural vibration undergoes slight suppression, the response frequency remains firmly locked. In the transition towards desynchronization, the competition between intrinsic shedding and extrinsic perturbation forces an early termination of the primary lock-in state, leading to a low-amplitude branch. This extrinsic dominance becomes increasingly pronounced at higher perturbation intensities. In the desynchronized regime, the perturbation energizes the wake dynamics and amplifies the structural response at the vortex shedding frequency. These findings clarify the multifaceted role of cross-flow perturbations in the VIV of cylindrical structures, providing valuable insights for the fatigue assessment and VIV control of marine engineering systems. [The reduced-velocity symbol was also missing from the supplied text.]
- 2023Li Y, Wu H, Jiang H, Zhong S, Zhang X. Computational aeroacoustics study of propellers with vibrational motion. AIAA Journal. 2023, 61(7):1-17. ↗
具有振动运动的螺旋桨计算气动声学研究Li Y, Wu H, Jiang H, Zhong S, Zhang X. Computational aeroacoustics study of propellers with vibrational motion. AIAA Journal. 2023, 61(7):1-17.
Li Y, Wu H, Jiang H, Zhong S, Zhang X. Computational aeroacoustics study of propellers with vibrational motion. AIAA Journal. 2023, 61(7):1-17.
查看原文View publication ↗实际无人机叶片常由轻质材料制成，可能发生振动。本文数值研究了具有振动运动的螺旋桨叶片的气动及气动声学特性。采用声波保持人工可压缩性方法解析非定常湍流产生的声音，再利用 Ffowcs Williams–Hawkings 方程的积分解将声音投射至远场观察点。研究表明，小振幅周期叶片振动能够引起推力脉动；由于有效迎角周期变化，振动还会影响叶尖涡及近叶片流动结构。因此，旋转频率谐波处产生显著纯音噪声，并可向转子盘面的上游和下游传播。声源分析表明，新增纯音噪声主要来自叶片轴向运动引起的多普勒效应及推力脉动的影响。此外，高频宽带噪声对叶片振动似乎并不敏感。
In this work, we conduct a numerical investigation of aerodynamics and aeroacoustics of propeller blades with vibrations, which could occur in practical unmanned aerial vehicles as the blades are often made of lightweight materials. The simulations resolve the sound generation from the unsteady turbulent flows using an acoustic-wave preserved artificial compressibility method. Then, the sound projection to the far-field observers is made using an integral solution of the Ffowcs-Williams and Hawkings equation. The study shows that periodic blade vibrations with small amplitudes can lead to aerodynamic thrust fluctuations. The blade vibration also affects the generation of tip vortices and the near-blade flow structures due to the periodic change of the effective angle of attack. Consequently, significant tonal noise at the harmonics of rotational frequency is produced, and the noise can propagate to both upstream and downstream directions of the rotor disc plane. A noise source analysis is performed to identify the contribution of different noise components. Results show that the extra tonal noise is mainly caused by the Doppler effect due to the blade axial motion and the influence of the thrust fluctuations. Moreover, the study also suggests that the high-frequency broadband noise seems to be insensitive to the blade vibration.
OPEN-SOURCE SOFTWARE
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分享实验室开发的开源计算软件，提供源码、使用文档与相关研究入口。Explore the laboratory’s open-source solvers, with source code, documentation and links to related research.
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