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Waterjet Wake Characterization Suite

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N00014-06-M-0218
Agency Tracking Number: N064-022-0187
Amount: $99,881.00
Phase: Phase I
Program: STTR
Solicitation Topic Code: N06-T022
Solicitation Number: N/A
Solicitation Year: 2006
Award Year: 2006
Award Start Date (Proposal Award Date): 2006-08-01
Award End Date (Contract End Date): 2007-05-31
Small Business Information
10621-J Iron Bridge Rd.
Jessup, MD 20794
United States
DUNS: 605227875
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Georges Chahine
 (301) 604-3688
Business Contact
 Georges Chahine
Title: President
Phone: (301) 604-3688
Research Institution
 Pamela Righter
ARL Pen State U PO Box 30
State College, PA 16804
United States

 (814) 863-3991
 Nonprofit College or University

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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