材料科学
曲折
复合材料
电阻率和电导率
玻璃棉
三聚氰胺
热导率
羊毛
流量(数学)
多孔性
数学
几何学
电气工程
工程类
图层(电子)
作者
Naoki Kino,Takayasu Ueno
标识
DOI:10.1016/j.apacoust.2006.11.008
摘要
Flow resistivity, tortuosity, viscous characteristic length and thermal characteristic length of three melamine foam and two glass wool samples have been measured. It has been found that a melamine foam sample with a bulk density 10.3 kg m−3 and a glass wool sample with a bulk density 28.0 kg m−3 have almost the same flow resistivity, however, the bulk density is as much as three times different. The cross-sectional pore shape factors, which are deduced with the non-acoustical parameters in the Johnson–Allard model, of the melamine foam are smaller than those of the glass wool. This paper also discusses a new relationship between the flow resistivity, the fibre equivalent diameter and the bulk density in melamine foam.
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