飛機的機體噪聲模型及控制方法科技報告

黃立錫　李曉東　張宇敏　王春啟　許影博

摘 要：該研究以大型民機機體噪聲問題為背景，圍繞噪聲源預測和控制進行以下6個子課題的研究。（1）高精度計算氣動聲學數值模擬預測方法研究。（2）新型傳聲器陣列氣動噪聲源定位與重構技術研究。（3）氣動噪聲產生機理及輻射特性研究。（4）翼型渦、聲干擾及控制研究。（5）聲閥門特性與控制研究。（6）流固聲耦合。該課題在多個方面取得突出進展。概述如下：（1）較大幅度提高聲源預測的計算速度和精度。（2）以理論解和模型實驗對噪聲和流體誘導振動實現新的控制。

關鍵詞：計算氣動聲學 聲源定位與重構 氣動噪聲產生機理 翼型渦聲干擾 聲閥門 流固聲耦合

Abstract：This technical report introduces the progress we have made thus far on aircraft fuselage noise modeling and its control. Based on the ultimate goal of reducing fuselage noise of large passenger aircraft，the study is divided into six topics： （1）High-accuracy computational areoaocustic prediction method. （2）Sound source localization and reconstruction by new microphone array design. （3）Aerodynamic noise generation mechanisms and its radiation pattern. （4）Prediction of sound generated by a wing and its control by a flap. 5. Study of acoustic valve. （6）Fluid-structure-sound interaction. Major developments are summarized as follows. （1）Substantial improvement was made in computational accuracy and efficiency of sound source localization prediction method. （2）New control methods were developed， both theoretically and experimentally， to control noise and flow induced vibration

Key Words：CAA；Sound source localization and reconstruction；Aerodynamic noise mechanism；Wing-Vortex interacting；Sound valv

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