Nonlinear Optoacoustic Underwater Sound.
Abstract
The objective of this study is to investigate nonlinear optoacoustic generation processes. The initiative for this project arose out of the findings from a previous ONR funded project on the thermoacoustic sound source. A new theoretical model was developed, called the equilibrium blast model, which is based on the hydrodynamic equations of equilibrium. The conditions at the shock fronts are determined by the maximum entropy condition. The distribution of energy within the blast is assumed to be through thermal conduction. Experiments were carried out to test the model, and the model was also compared with experimental data. The experimental data showed that more than one process was involved. So far, three distinct blast processes have been identified, the weak blast, the thermal conduction limited equilibrium blast, and the emission limited equilibrium blast. The last is deserving of further study from a basic physics point of view and from an application standpoint.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 11, 1988
- Accession Number
- ADA194354
Entities
People
- Nicholas P. Chotiros
Organizations
- University of Texas at Austin