Applying the phononic crystal concept to the intake muffler of a refrigeration compressor
Applying the phononic crystal concept to the intake muffler of a refrigeration compressor
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DOI：
10.1016/j.apacoust.2022.108800
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发表时间：
2022-05-06
影响因子：
3.4
通讯作者：
Arruda, J. R. F.
中科院分区：
文献类型：
--
作者：
Almeida, V. F.;Lima, V. D.;Arruda, J. R. F.
许多以前的作品探索使用周期性结构的波阻带（带隙）的创建。为了改善制冷压缩机消声器的传递损失，提出了利用布拉格散射引起的波衰减带的概念来重新设计现有的进气消声器。所面临的挑战在于设计一个声子晶体（PnC）的音频频率范围内的带隙与实际消声器应用的尺寸限制。第一部分的研究重点是发展和验证的数值和实验技术，定期消声器设计提供指导方针。第二部分包括将开发的概念和工具应用于真实的压缩机消声器，遵循产品规格的约束。一种形状优化技术被用来扩大的带隙，同时保持在几十毫米的数量级的单位电池的长度。两种设计都是3D打印的，并在真实的压缩机上进行了测试，在目标频带内的声功率级（SPL）降低了7 dB，压缩机整体噪声级降低了4 dB。(c)2022爱思唯尔有限公司保留所有权利。
Many previous works explore the creation of wave stop bands (bandgaps) using periodic structures. Aiming at improving the transmission loss of a muffler used in a refrigerant compressor, this work proposes the redesign of an existing intake muffler using the concept of wave attenuation bands caused by Bragg scattering. The challenge consists in designing a phononic crystal (PnC) with bandgaps in the audio frequency range with the size constraints of a practical muffler application. The first part of the research focuses on the development and validation of numerical and experimental techniques to provide guidelines for periodic muffler design. The second part consists in applying the developed concepts and tools to a real compressor muffler following the constraints of the product specifications. A shape optimization technique is used to enlarge the bandgap while keeping the unit cell length in the order of tens of millimeters. Two designs were 3D-printed and tested on the real compressor, reaching 7 dB reduction on the sound power level (SPL) in the aimed frequency band and 4 dB reduction on the overall compressor noise level. (c) 2022 Elsevier Ltd. All rights reserved.