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MUFFLER SYSTEMS FOR AIRCRAFT NOISE REDUCTION

机译：用于飞机降噪的消音器系统

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摘要

Noise reduction is considered to be one of the major challenges in aircraft industry, since beginning of bi-plane era to recent advanced fast jet aircraft era. In general, aircraft noise can be classified into two categories i. e. aircraft interior (cabin noise) and exterior noise. Some of the typical structure borne and air borne noise sources for both interior and exterior noise are engine, cabin conditioning system, fuselage, landing gear, canopy and wings etc. Over the years, the structure borne noise has been effectively reduced by means of active and passive control of aircraft structures. The airborne noise source is aerodynamic in nature and has broad band frequency content. This can be effectively reduced by preventing the formation of turbulence or wake. For the past few decades mufflers have been used in aircraft industry to reduce the noise generated by propulsion system and cabin conditioning system. This paper gives an overview of noise in aircraft, the application of mufflers used in the general aircraft industry and also how effectively the muffler systems can be designed by taking into account the source and termination conditions.
机译：从双翼飞机时代开始到最近的先进快速喷气飞机时代，降低噪声被认为是飞机工业的主要挑战之一。通常，飞机噪声可分为两类。 e。飞机内部（机舱噪声）和外部噪声。内部和外部噪声的一些典型的固体传播和空气传播噪声源是发动机，机舱调节系统，机身，起落架，机盖和机翼等。多年来，通过主动降低了固体传播的噪声。和飞机结构的被动控制。机载噪声源本质上是空气动力学的，具有宽频带频率。通过防止湍流或尾流的形成，可以有效地减少这种情况。在过去的几十年中，消音器已用于飞机行业，以减少由推进系统和机舱调节系统产生的噪音。本文概述了飞机中的噪声，通用飞机行业中使用的消声器的应用以及通过考虑源和终止条件如何有效设计消声器系统。

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  • 来源
    《Journal of Aerospace Sciences and Technologies》 |2011年第1期|p.19-34|共16页
  • 作者

    M.G. Prasad; B. Rajavel;

  • 作者单位

    Noise and Vibration Control Laboratory, Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, New Jersey-07030, USA;

    Noise and Vibration Control Laboratory, Department of Mechanical Engineering, Stevens Institute of Technology, Hoboken, New Jersey-07030, USA;

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