title: Isentropic acoustic propagation in a viscous fluid with uniform circular pipeline flow.
abstract: Isentropic wave propagation in a viscous fluid with a uniform mean flow confined by a rigid-walled circular pipeline is considered. A method based on the Fourier-Bessel theory, which is complete and orthogonal in Lebesgue space, is introduced to solve the convected acoustic equations. After validating the method's convergence, the cut-off frequency of wave modes is addressed. Furthermore, the effect of flow profile on wave attenuation is analyzed. Meanwhile, measurement performance of an ultrasonic flow meter based on wave propagation is numerically accounted.
authors.affiliation: Institute of Space Technology, College of Aerospace Science and Engineering, National University of Defense Technology, 410073, Changsha, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Chen
authors.forename: Yiyong
authors.initials: Y
authors.lastname: Huang
authors.forename: Xiaoqian
authors.initials: X
authors.lastname: Chen
mesh_terms: D003198:Computer Simulation; D008962:Models, Theoretical; D009038:Motion; D009716:Numerical Analysis, Computer-Assisted; D012212:Rheology; D013016:Sound; D013997:Time Factors; D014465:Ultrasonics; D014783:Viscosity