title: Acoustic attenuation, phase and group velocities in liquid-filled pipes III: nonaxisymmetric propagation and circumferential modes in lossless conditions.
abstract: Equations for the nonaxisymmetric modes that are axially and circumferentially propagating in a liquid-filled tube with elastic walls surrounded by air/vacuum are presented using exact elasticity theory. Dispersion curves for the axially propagating modes are obtained and verified through comparison with measurements. The resulting theory is applied to the circumferential modes, and the pressures and the stresses in the liquid-filled pipe are calculated under external forced oscillation by an acoustic source. This provides the theoretical foundation for the narrow band acoustic bubble detector that was subsequently deployed at the Target Test Facility (TTF) of the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL), TN.
authors: Institute of Sound and Vibration Research, University of Southampton, Highfield, Southampton, Hampshire, SO17 1BJ, United Kingdom.
authors: Kyungmin
authors: K
authors: Baik
authors: Jian
authors: J
authors: Jiang
authors: Timothy G
authors: TG
authors: Leighton
mesh_terms: D000162:Acoustics / Q000295:instrumentation; D000388:Air; D004548:Elasticity; D004867:Equipment Design; D020342:Finite Element Analysis; D008962:Models, Theoretical; D009038:Motion; D009991:Oscillometry; D011312:Pressure; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013018:Sound Spectrography; D013314:Stress, Mechanical; D013997:Time Factors; D014160:Transducers, Pressure; D014618:Vacuum