High-lift device noise has been identified as a major noise source during aircraft approach and landing.Reviews on the noise generation mechanism and noise control methods of the high-lift device noise are conducted.Challenges in understanding the physical mechanism of the noise generation and implementing effective noise control has been pointed out.We performed high-fidelity large-eddy simulations for flow past the slat,flap trailing-edge and flap side-edge separately.Based on phase-averaging analysis,proper orthogonal decomposition (POD),dynamic mode decomposition (DMD),and two-point correlations,we increase insights on the underlying physics of the high-lift device noise.The results are expected to guide the design of high efficient noise control approaches.%增升装置噪声是大型客机起降阶段总体噪声水平的重要组成部分.本文综述分析了增升装置噪声机理与噪声控制方法,指出了当前增升装置噪声研究中存在的几个关键难题.开展了高可靠性大涡模拟数值计算,利用相平均、本征正交分解、动态模态分解和相关性分析等方法,对缝翼噪声、襟翼尾缘噪声和襟翼侧缘噪声机理进行了深入研究,增强了对增升装置噪声机理的认识,研究结果有助于指导高效噪声控制方法设计.
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