Zhou Di, Wang Xiaoyu, Jing Xiaodong, Sun Xiaofeng
School of Energy and Power Engineering, Beihang University, No. 37 Xueyuan Road, Haidian District, Beijing 100191, People's Republic of China.
J Acoust Soc Am. 2016 Aug;140(2):1251. doi: 10.1121/1.4959001.
This paper describes analytical and experimental studies conducted to investigate the acoustic properties of axially non-uniform multiple cavity resonance liner for absorbing higher-order duct modes. A three-dimensional analytical model is proposed based upon transfer element method. The model is assessed by making a comparison with results of a liner performance experiment concerning higher-order modes propagation, and the agreement is good. According to the present results, it is found that the performance of multiple cavity resonance liner is related to the incident sound waves. Moreover, an analysis of the corresponding response of liner perforated panel-cavity system is performed, in which the features of resonance frequency and dissipation of the system under grazing or oblique incidence condition are revealed. The conclusions can be extended to typical non-locally reacting liners with single large back-cavity, and it would be beneficial for future non-locally reacting liner design to some extent.
本文描述了为研究轴向非均匀多腔共振衬垫吸收高阶管道模式的声学特性而进行的分析和实验研究。基于传递单元法提出了一种三维分析模型。通过与关于高阶模式传播的衬垫性能实验结果进行比较来评估该模型，结果吻合良好。根据目前的结果，发现多腔共振衬垫的性能与入射声波有关。此外，对衬垫穿孔板 - 腔体系统的相应响应进行了分析，揭示了掠射或斜入射条件下系统的共振频率和耗散特性。这些结论可推广到具有单个大背腔的典型非局部反应衬垫，在一定程度上对未来非局部反应衬垫的设计有益。
