Nonlinear Interaction of Impulsive Acoustic/Hydrodynamic Sources and Natural Ocean Inhomogeneities

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-11-C-0019
Agency Tracking Number: N09A-002-0008
Amount: $743,090.00
Phase: Phase II
Program: STTR
Awards Year: 2011
Solicitation Year: 2009
Solicitation Topic Code: N09-T002
Solicitation Number: 2009.A
Small Business Information
520 N. Washington Street, #200, Falls Church, VA, -
DUNS: 082347253
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 John Pierce
 Senior Scientist
 (703) 534-8000
 jpierce@cortana.com
Business Contact
 Marjorie Moore
Title: Director of Administratio
Phone: (703) 534-8000
Email: mmoore@cortana.com
Research Institution
 ARL/Penn State University
 Robert L Baker
 PO Box 30
State College, PA, 16804-
 (814) 867-1552
 Nonprofit college or university
Abstract
Phase II research will follow the most promising leads developed in Phase I, with the end goal of developing a viable physics-based model that can explain observations available to the Government. A dispersive focusing mechanism, supplemented by the theory of cylindrically-symmetric solitons, is the most promising mechanism identified in Phase I. Three related tasks will be performed: Detailed theoretical and numerical analysis of the process of linear dispersive focusing in cylindrical geometry. Formulation of correct non-linear solitary wave propagation equations in cylindrical coordinates, and theoretical and numerical analysis of the transition from linear to non-linear propagation. Modeling of the radar signature produced by the cylindrical wave packets propagating outward from the source. A weak shock mechanism was studied in Phase I, and some additional research related to this mechanism is proposed for Phase II. Two tasks are planned. Adaptation of the existing shock propagation model to a non-uniform environment. Laboratory measurements of the long-time effects of the Richtmyer-Meshkov instability at the air/water interface.

* Information listed above is at the time of submission. *

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