An experimental study of the pressure in a fast bottom beneath the apex of an overlying fluid wedge.
Loading...
Authors
Hedrick, Michael K.
Subjects
pressure field in a fast bottom
fluid wedge overlying a fast bottom
fluid wedge overlying a fast bottom
Advisors
Sanders, James V.
Date of Issue
1984-12
Date
December 1984
Publisher
Language
en_US
Abstract
The pressure profile in a fast bottom directly beneath
the apex of a fluid wedge was investigated experimentally
and compared with a computer model, which used saddle-point
approximations based on image theory to predict the pressure
under varying acoustical and geometrical parameters.
Transducer fluid served as the fluid wedge overlying a water
substrate. The fluid in the wedge was contained in an
enclosed structure and was separated from the substrate by a thin
Mylar membrane. The density ratio was 0.98 and the
speed of sound ratio was 0.91. The experiment was conducted
at a frequency of 88.2 kHz. Data were taken with the enclosure
pressurized and nonpressurized for wedge angles of two
through ten degrees, and with projector elevation angles at
one-half and one-quarter the wedge angle. The experimental
results agreed with theoretical predictions. Additionally,
acceptable agreement was achieved between pressurized and
nonpressurized conditions.
Type
Thesis
Description
Series/Report No
Department
Engineering Acoustics Academic Committee
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.