Waterjet Wake Characterization Suite

Award Information
Agency:
Department of Defense
Branch:
Navy
Amount:
$99,881.00
Award Year:
2006
Program:
STTR
Phase:
Phase I
Contract:
N00014-06-M-0218
Agency Tracking Number:
N064-022-0187
Solicitation Year:
2006
Solicitation Topic Code:
N06-T022
Solicitation Number:
N/A
Small Business Information
DYNAFLOW, INC.
10621-J Iron Bridge Rd., Jessup, MD, 20794
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
605227875
Principal Investigator
 Georges Chahine
 President
 (301) 604-3688
 glchahine@dynaflow-inc.com
Business Contact
 Georges Chahine
Title: President
Phone: (301) 604-3688
Email: glchahine@dynaflow-inc.com
Research Institution
 ARL PEN STATE
 Pamela Righter
 ARL Pen State U PO Box 30
State College, PA, 16804
 (814) 863-3991
 Nonprofit college or university
Abstract
Bubble generation and entrainment in the transom region of a surface ship, along its hull, and in breaking waves are major ship signature contributors. For advanced ships such as the LCS, another source of air entrainment is added with the propulsion waterjets interacting with the free surface in the transom region. While significant research on breaking waves bubble generation exists, little is known about waterjet propulsion impact on bubbly wakes. Such wakes provide an excellent opportunity to wake homing torpedoes because of bubbles large acoustic cross section. Therefore, it is imperative to develop computational tools capable of predictive analysis for design optimization of bubbly wakes of waterjet driven ships. DYNAFLOW and ARL at the Pennsylvania State University propose to develop a suite of tools for modeling the waterjet driven ships bubbly wakes, conducting acoustic analysis relevant to wake homing threats, assessing threat performance in engagement simulations and conducting experiments to validate and refine the models. A suite of CFD codes known to reproduce conventional ship wakes properly will be used and modified by adding physical models of the waterjet free surface bubble entrainment mechanisms, which will be developed through experimental observation and modeling. BENEFITS: The proposed tool suite can be used for design evaluation of waterjet propelled surface ships. The developed models for bubble generation, propagation, and acoustics can be also combined with other CFD methods and could benefit commercial sectors such as fast ship industry, food manufacturing, oil and gas industry, chemical industry, etc.

* information listed above is at the time of submission.

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