模型分析和实验研究热粘性和流体流动对通风声学元材料迷宫的影响
Shengnan Du1, Dacheng Zhang1,2, Xianming Sun1
1College of Mechanical and Automotive Engineering, Ningbo University of Technology, Ningbo, 315211, China.
Scientific reports
|November 8, 2024
概括
这项研究引入了一个通风的声学元材料迷宫 (VAML),用于通过通风降低噪音. 热粘性效应是其声音吸收和性能的关键,经过实验验证.
科学领域:
- 声学 声学 在声学上
- 材料科学 材料科学 材料科学
- 流体动力学 流体动力学
背景情况:
- 噪音污染需要有效的减噪解决方案,特别是在通风环境中.
- 在保持空气流动的同时实现降低噪音是一个重大的工程挑战.
研究的目的:
- 提出和分析一个新的通风声学元材料迷宫 (VAML).
- 研究热粘性效应 (TVE) 对VAML性能的影响.
- 探索结构参数的影响和流速对噪声减弱的影响.
主要方法:
- 开发用于VAML的分析和数值计算模型.
- 声传输损失的定量分析.
- 实验验证和与理论结果进行比较.
- 对传输系数和阻抗进行分析.
- 结构尺寸和流速的参数研究.
主要成果:
- VAML显示有效的噪声减弱,实验结果显示与理论模型相比,0.6%的误差.
- 热粘性效应 (TVE) 被确定为声音吸收的关键因素.
- 结构参数 (通道长度,宽度,通风半径) 显著影响共振频率和传输系数.
- 减少特定的结构参数可以提高降噪效果.
- 流速会影响宏观的声学特性.
结论:
- 在通风空间中,VAML是减噪的可行解决方案.
- 在VAML的吸声能力中,TVE起着至关重要的作用.
- 结构设计为共振频率提供可调节的控制和降低噪声.
- 流体动力学会影响VAML的整体声学性能.
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