Finite-amplitude standing waves in rigid-walled tubes
Loading...
Authors
Beech, Wayne "L"
Subjects
Attenuation constant
Attenuation coefficient
End-effort losses
Finite amplitude
Non-linear acoustic wave equation
Perturbation
Q-curves
Resonance tubes
Rigid-walled tubes
Standing waves
Attenuation coefficient
End-effort losses
Finite amplitude
Non-linear acoustic wave equation
Perturbation
Q-curves
Resonance tubes
Rigid-walled tubes
Standing waves
Advisors
Sanders, James V.
Date of Issue
1967-12
Date
December 1967
Publisher
Monterey, California. U.S. Naval Postgraduate School
Language
en_US
Abstract
Finite-amplitude standing wave effects in air at ambient conditions contained in rigid-walled cylindrical tubes with large length to diameter ratios were experimentally investigated. These results were compared to a perturbation solution of the one-dimensional non-linear acoustic wave equation which incorporates the dissipative effects due to viscous and thermal energy losses at the walls. The lowest resonance frequencies of the tubes ranged from 62.5 Hz to 1 kHz, and sound pressure levels (based on the fundamental) ranged up to 160 dB. The finite-amplitude distortion was in excellent agreement almost up to the onset of shock. A detailed investigation of small amplitude attenuation in standing wave tubes was conducted and compared with the Kirchhoff equations. Agreement within one percent was obtained when consideration was given to the numerical analysis correction and end-effect losses.
Type
Thesis
Description
Series/Report No
Department
Department of Physics
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.