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
气动声学实验与噪声控制Aeroacoustic Experiments & Noise Control
通过消声环境测试、声学参数测量和数值分析，验证噪声产生与传播的机理，并评估尾缘处理、声衬和结构隔振等措施。研究同时关注降噪效果及其气动或结构代价，结论以相应实验对象和工况为界。Anechoic measurements, acoustic-parameter tests and numerical analysis are used to examine sound generation and propagation and to assess trailing-edge treatments, liners and vibration isolation. We consider both acoustic benefits and aerodynamic or structural trade-offs within each study's tested conditions.
动态可视化IN MOTION
飞行轨迹与噪声时频分析动画Flight trajectory and noise spectrogram 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.
- 2026Han T, Lu H, McFarland DM, Jiang H. Fusion of FEA and SEA for mid-frequency acoustics in a variable-section duct: Impedance-based coupling and experimental validation. Journal of Computational and Applied Mathematics, 2026, 484: 117481. ↗
变截面管道中频声学的 FEA–SEA 阻抗耦合Fusion of FEA and SEA for mid-frequency acoustics in a variable-section duct: Impedance-based coupling and experimental validation
Han T, Lu H, McFarland DM, Jiang H. Fusion of FEA and SEA for mid-frequency acoustics in a variable-section duct: Impedance-based coupling and experimental validation. Journal of Computational and Applied Mathematics, 2026, 484: 117481.
查看原文View publication ↗本文结合有限元分析（FEA）与统计能量分析（SEA），计算两腔阶梯声学管道的中频响应。腔室 1 尺寸为 0.644×0.045×0.045 m，腔室 2 为 0.17×0.02×0.02 m，两者同轴连接，由腔室 1 外端扬声器驱动。在全消声室内开展 178–11220 Hz 测试。按模态数量分类，腔室 1 在 1415–8913 Hz 内表现为一维与三维混合子系统，采用统计建模；腔室 2 保持一维特征，采用确定性建模。两者通过阻抗动态凝聚为单自由度的界面耦合。由阻抗管测得吸声系数推导内部损耗因子；声源表征在第一截止频率 3811 Hz 以下采用多传声器方法，更高频率采用平面波近似。腔室 1 的 SEA 解给出界面声压和体积速度，预计算传递函数用于预测腔室 2 测点声压。实验显示，两腔最大误差分别为 2.88 dB 和 3.02 dB。所提方法耗时 1009 s，相比耗时 20061 s 的全系统有限元计算快约 20 倍。
This work presents a fusion of finite element analysis (FEA) and statistical energy analysis (SEA) for calculating the mid-frequency response in a stepped acoustic duct comprising two chambers, Chamber 1 (0.644 × 0.045 × 0.045 m3) coupled to Chamber 2 (0.17 × 0.02 × 0.02 m3), arranged coaxially and driven by a loudspeaker at the outer end of Chamber 1. The system was tested in a fully anechoic room over 178 to 11220 Hz. Based on modal-number classification, Chamber 1 acted as a mixed 1D/3D subsystem over 1415 to 8913 Hz, and so was modeled statistically, whereas Chamber 2 remained 1D and was treated deterministically. The subsystems were coupled by an interface with impedance dynamically condensed to a single-degree-of-freedom. Absorption coefficients measured in an impedance tube were used to derive internal loss factors. Source characterization combined a multi-microphone approach for frequencies below the first cutoff at 3811 Hz and a plane-wave approximation for higher frequencies. The SEA solution for Chamber 1 yielded interface pressure and volume velocity, while pre-computed transfer functions predicted pressures at probe positions in Chamber 2. Experiments showed maximum errors of 2.88 dB in Chamber 1 and 3.02 dB in Chamber 2. The proposed method required 1009 s of computation, and is thus about 20 × faster than full-system FEA, which required 20061 s.
- 2022Zhou P, Zhong S, Li X, Li Y, Chen W, Jiang H, Zhang X*. Broadband trailing edge noise reduction through porous velvet-coated serrations. Physics of Fluids, 2022, 34(5): 057112. ↗
通过多孔绒面涂层锯齿降低宽频尾缘噪声Zhou P, Zhong S, Li X, Li Y, Chen W, Jiang H, Zhang X*. Broadband trailing edge noise reduction through porous velvet-coated serrations. Physics of Fluids, 2022, 34(5): 057112.
Zhou P, Zhong S, Li X, Li Y, Chen W, Jiang H, Zhang X*. Broadband trailing edge noise reduction through porous velvet-coated serrations. Physics of Fluids, 2022, 34(5): 057112.
查看原文View publication ↗本文实验研究尾缘锯齿与薄多孔膜或绒面结构组合降低湍流边界层尾缘噪声的潜力。消声风洞实验以平板为基准，弦长雷诺数为 2×10⁵ 至 5×10⁵，并在前缘附近充分触发边界层转捩。研究测试了锯齿与未扰动尾流对齐及不对齐两种安装方式。传统锯齿在流动不对齐时降噪能力显著下降，组合结构则仅受轻微影响。所开发的新组合方案在尾缘锯齿周围布置锯齿状多孔绒面结构，优于未改进锯齿，在对齐和不对齐条件下、以边界层厚度定义的斯特劳哈尔数 0.3 至 1 的宽频范围内均可实现约 10 dB 降噪。同时，绒面结构使气动阻力增加约 30%–40%。进一步的热线尾流测量揭示了附加降噪能力的可能机制。
This study experimentally investigates the potential of using combinations of trailing edge serrations and thin porous membrane/velvet structures for turbulent boundary layer trailing edge noise reduction. The experiments were conducted in an anechoic wind tunnel, with a flat plate model as the baseline model. The chord-based Reynolds number ranged between 2×105 and 5×105, and the boundary layers were fully tripped near the leading edge. Two different installation methods were tested, where the serration structure was aligned/misaligned with the undisturbed wake flow. It was observed that the noise reduction capability of the conventional serrations deteriorates significantly when the serrations are misaligned with the flow, while the performances of the combined structures are only slightly affected by flow misalignment. A novel combined treatment is developed, in which the trailing edge serrations are surrounded by serrated porous velvet structures. This treatment is found to outperform the unmodified serrations and can achieve approximately 10 dB noise reduction in both flow-aligned and flow-misaligned conditions, within a wide frequency range corresponding to a boundary layer thickness-based Strouhal number Stδ between 0.3 to 1. A 30%–40% increase in the aerodynamic drag due to the velvet structures was observed. Further hotwire wake survey revealed the possible mechanisms for the additional noise reduction capability of the combined treatments.
OPEN-SOURCE SOFTWARE
让研究方法，成为可用的工具。Research methods, ready to use.
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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