中国物理B ›› 2014, Vol. 23 ›› Issue (7): 74301-074301.doi: 10.1088/1674-1056/23/7/074301

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Nonlinear impedances of thermoacoustic stacks with ordered and disordered structures

葛欢, 范理, 夏洁, 张淑仪, 陶莎, 杨跃涛, 张辉   

  1. Lab of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, China
  • 收稿日期:2013-12-17 修回日期:2014-02-19 出版日期:2014-07-15 发布日期:2014-07-15
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2012CB921504), the National Natural Science Foundation of China (Grant Nos. 11374154, 10904067, and 11174142), the Ph.D. Programs Foundation of Ministry of Education of China (Grant No. 20090091120050), the Priority Academic Program Development of Jiangsu Higher Education Institutions, China, and the Fundamental Research Funds for the Central Universities of Ministry of Education of China (Grant No. 1101020402).

Nonlinear impedances of thermoacoustic stacks with ordered and disordered structures

Ge Huan (葛欢), Fan Li (范理), Xia Jie (夏洁), Zhang Shu-Yi (张淑仪), Tao Sha (陶莎), Yang Yue-Tao (杨跃涛), Zhang Hui (张辉)   

  1. Lab of Modern Acoustics, Institute of Acoustics, Nanjing University, Nanjing 210093, China
  • Received:2013-12-17 Revised:2014-02-19 Online:2014-07-15 Published:2014-07-15
  • Contact: Fan Li E-mail:Fanli@nju.edu.cn
  • About author:43.35.Ud; 43.25.Gf; 43.40.Ga
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2012CB921504), the National Natural Science Foundation of China (Grant Nos. 11374154, 10904067, and 11174142), the Ph.D. Programs Foundation of Ministry of Education of China (Grant No. 20090091120050), the Priority Academic Program Development of Jiangsu Higher Education Institutions, China, and the Fundamental Research Funds for the Central Universities of Ministry of Education of China (Grant No. 1101020402).

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摘要： Nonlinear impedances of two thermoacoustic stacks with ordered structures (plate-type and pipe-type) and one with a disordered structure (copper mesh) are studied. The linear resistances, nonlinear coefficients and effective acoustic masses of the stacks are extracted from the experimental results based on an analogical model of nonlinear impedances of porous materials. The resistance and nonlinear coefficient of the disordered stack are found to be much larger than those of the ordered stacks, which have similar volume porosities. In the ordered stacks, the resistance is only marginally influenced by the length of the stack, while in the disordered stack, the resistance increases significantly with the length. These characteristics of the impedances of ordered and disordered stacks are explained with the minor loss theory and the tortuosity of a stack.

关键词: thermoacoustic stack, impedance, nonlinearity

Abstract: Nonlinear impedances of two thermoacoustic stacks with ordered structures (plate-type and pipe-type) and one with a disordered structure (copper mesh) are studied. The linear resistances, nonlinear coefficients and effective acoustic masses of the stacks are extracted from the experimental results based on an analogical model of nonlinear impedances of porous materials. The resistance and nonlinear coefficient of the disordered stack are found to be much larger than those of the ordered stacks, which have similar volume porosities. In the ordered stacks, the resistance is only marginally influenced by the length of the stack, while in the disordered stack, the resistance increases significantly with the length. These characteristics of the impedances of ordered and disordered stacks are explained with the minor loss theory and the tortuosity of a stack.

Key words: thermoacoustic stack, impedance, nonlinearity

中图分类号:  (Thermoacoustics, high temperature acoustics, photoacoustic effect)

  • 43.35.Ud
43.25.Gf (Standing waves; resonance) 43.40.Ga (Nonlinear vibration)