Chen Yong, Huang Yiyong, Chen Xiaoqian, Bai Yuzhu
College of Aerospace Science and Engineering, National University of Defence Technology, 410073, Changsha, People's Republic of China.
J Acoust Soc Am. 2014 Oct;136(4):1692-701. doi: 10.1121/1.4894801.
The axisymmetric wave propagation in a viscous fluid with the presence of a uniform flow confined by a circular pipeline is investigated. Particular considerations are imposed on the features of the acoustic wave propagating in the liquid where the thermal conduction is neglected. The boundary constraints at the wall are reasonably discussed for both lined-walled and rigid-walled pipelines. Numerical comparisons of the phase velocity and wave attenuation among three different boundary configurations (rigid wall, steel-composed wall, and aluminum-composed wall) are presented. Meanwhile, the effects of the fluid viscosity and acoustic impedance are coherently analyzed. In the end, parametric analysis of the influence of the acoustic impedance is given in the case of a steel-composed pipeline.
研究了在圆形管道限制的均匀流存在下粘性流体中的轴对称波传播。特别考虑了在忽略热传导的液体中传播的声波的特性。对衬砌壁管道和刚性壁管道的壁面边界约束进行了合理讨论。给出了三种不同边界配置（刚性壁、钢质壁和铝质壁）下相速度和波衰减的数值比较。同时，连贯地分析了流体粘度和声阻抗的影响。最后，给出了钢质管道情况下声阻抗影响的参数分析。
