Axisymmetric wave propagation in gas shear flow confined by a rigid-walled pipeline*
Chen Yonga)†, Huang Yi-Yonga), Chen Xiao-Qiana), Bai Yu-Zhua), Tan Xiao-Dongb)
       
Relative phase velocity (a) and attenuation coefficient (b) of the fundamental mode each as a function of the acoustic frequency for different models. ‘nonisen’ refers to the non-isentropic acoustic wave, ‘isen’ the isentropic acoustic wave, ‘Peat’ the model proposed by Peat, ‘Doku’ the model proposed by Dokumaci, and ‘Prop’ the model proposed by the authors.