摘要
修正进气导管的影响对声学共鸣法测量Bohzmann常数kB十分必要。基于一阶声学微扰理论研究了导管对圆柱形共鸣腔理想径向共振模式的扰动，分析了导管末端不同连接方式所带来的声阻抗差异，计算了导管对。（001）径向模式的共振频率和半宽的扰动值分别为△f/f0≈-0．04×10^-6和△g／f0≈14．15×10^-6，同时分析了导管长度、半径以及径向安装位置的变化对理想径向共振模式扰动的影响。
Correcting the effect of the fill duct for gas-in and out is very necessary for Boltzmann constant kB measurement. The duct perturbations for ideal radial resonance modes of the cylindrical acoustic resonator were studied, and the various acoustic impedances of duct due to different ways of connection at the end of the duct were analyzed, The perturbations for the resonance frequency and the half width were calculated to be △f/f0≈-0.04×10^-6 and △g/f0≈14.15×10^-6 respectively. The influences for perturbations of the ideal radial resonance modes due to the changes of length, internal diameter and fixed - position of duct were also analyzed.
出处
《计量学报》
CSCD
北大核心
2011年第5期455-458,共4页
Acta Metrologica Sinica
基金
国家自然科学基金（50906076）
关键词
计量学
声学共鸣法
圆柱形共鸣腔
理想径向共振模式
导管
扰动
Metrology
Acoustic resonance
Cylinder resonator
Ideal radial resonance modes
Duct
Perturbation
