An acoustic bubble density measurement technique for surface ship waters
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Authors
Hampton, Stephen Wallace
Subjects
Acoustic Bubble Density Measurements
Surface Ship Wakes
Bubble Resonance
Duel Frequency Bubble Detection
Ultrasonic Bubble Detection
Surface Ship Wakes
Bubble Resonance
Duel Frequency Bubble Detection
Ultrasonic Bubble Detection
Advisors
Atchley, Anthony
Date of Issue
1987-09
Date
Publisher
Language
en_US
Abstract
The Dual Frequency Pump Method of acoustically determining point by point bubble cloud densities was studied to determine the practicality of using this acoustic technique to determine bubble densities in surface ship wakes. The dual frequency technique of acoustically detecting bubbles utilizes a high and low frequency sound field to insonify the target bubbles. The bubbles themselves then radiate sound at the sidebands of higher frequency. The frequency of the return sound is proportional to the bubble sizes present. The Dual Frequency Pump Method of bubble detection can differentiate and count many different sized bubbles and is, therefore, well suited for determining ship wake bubble density distributions. The theory, considerations, experimental results, and recommendations of this thesis support the application of the dual frequency acoustic techniques to the ship wake problem. Keywords: Theses; Acoustic bubble density measurement; Surface ship wakes; Bubble resonance; Dual frequency bubble detection; Ultrasonic bubble detection
Type
Thesis
Description
Series/Report No
Department
Antisubmarine Warfare Academic Group
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
186 p.: ill.: 28 cm.
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.