阵风/叶栅干涉噪声的一种前馈控制策略研究

 基于反问题的研究思路,探讨了阵风/ 叶栅干涉噪声的一种前馈式主动控制策略。具体研究思路是试图通过在静子叶栅表面引入附加的“二次级声源”,精确地消去所感兴趣区域的声音,二次级声源强度基于阵风/ 叶栅干涉气动声学反问题模型获得,并通过数值实验的方法探寻了二次级声源合理布放策略。研究结果不仅证实了在叶栅表面布放偶极子声源的可行性,而且提出了在尽量不影响气动性能前提下的前馈主动噪声控制方法。

Feedforward Control Study on Gust/Cascade Interaction Noise

This paper investigates the feasibility of applying a feedforward active control strategy for reducing gust/cascade interaction noise via an inversion technique. The basic scenario is to cancel the interaction noise through the introduction of secondary sources distributing on cascade surfaces. The intensity of the secondary sources is obtained based on an aeroacoustic inversion model. Numerical study reveals the feasibility of embedding dipole secondary sources on cascade surfaces. In addition, the optimal distribution is also investigated for alleviating the sacrifice of aerodynamic performance.