论文部分内容阅读
纳米碳纤维是一种新型吸波材料。为探讨烟幕粒子的红外消光特性,利用矩量法建立了纳米碳纤维感应电流和散射场的计算模型,在此基础上得出了纳米碳纤维吸收、散射和消光截面的计算表达式。通过Matlab编程计算分析了纳米碳纤维红外消光截面与电导率的关系。结果表明,纳米碳纤维红外消光特性与电导率密切相关,随着电导率的增加,消光截面迅速增加,当波长大于纤维本身长度时,消光截面随电导率的变化出现峰值,峰值电导率与波长有关。
Nano-carbon fiber is a new wave absorbing material. In order to investigate the infrared extinction characteristics of the smoke particles, a calculation model of the induced current and the scattering field of the nano-carbon fibers was established by using the moment method. The expressions of the absorption, scattering and extinction cross sections for the nano-carbon fibers were obtained. The relationship between the infrared extinction cross section of nano-carbon fiber and the conductivity was calculated by Matlab programming. The results show that the infrared extinction characteristics of nanocarbon fibers are closely related to the electrical conductivity. With the increase of electrical conductivity, the extinction cross section increases rapidly. When the wavelength is longer than the fiber length, the extinction cross section changes with the change of electrical conductivity, and the peak conductivity is related to the wavelength .