Tech

February 6, 2013

New water jets could propel LCS to greater speeds

onr-water-jetsThe Navy’s fifth Littoral Combat Ship, Milwaukee, will be the first to benefit from new high-power density water jets aimed at staving off rudder and propeller damage experienced on high-speed ships.

The product of an Office of Naval Research Future Naval Capabilities program, the waterjets arrived last month at the Marinette Marine shipyard in Wisconsin, where Milwaukee (LCS 5) is under construction.

“We believe these waterjets are the future,” said Dr. Ki-Han Kim, program manager in ONR’s Ship Systems and Engineering Research Division. “Anything that we can do to keep ships ready to go will ultimately benefit our war fighters.”

Chief of Naval Operations Adm. Jonathan Greenert’s 2013-2017 Navigation Plan calls for fielding improved ships to support counterterrorism and irregular warfare missions at sea and ashore. The LCS will play a big role in the Navy’s plan as a modular, adaptable vessel for use against diesel submarines, littoral mines and attacks by small surface craft.

Developed by Rolls-Royce Naval Marine in Walpole, Mass., in collaboration with ONR and Naval Surface Warfare Center, Carderock Division, the new Axial-Flow Waterjet Mk-1 can move nearly half a million gallons of seawater per minute, providing more thrust per unit than current commercial water jets. Four of the new water jets will propel the LCS to speeds greater than 40 knots.

Researchers believe the smaller, more efficient wate jets will help the LCS avoid excessive maintenance costs associated with cavitation — a phenomenon that occurs when changes in pressure create air bubbles on rotating machinery, such as marine propellers. Repeated occurrences can cause whole chunks of metal to wear away, leading to frequent repairs and replacements.

The water jets’ new design could increase their lifespan between repairs.

The FNC program that oversaw development of this technology proved to be as adaptable as LCS. The water jets originally were slated to benefit another ship program that was discontinued. Instead of cancelling the water jets program, officials regrouped and shifted their focus to designing a product that would improve the performance of LCS.

ONR’s FNC program saves taxpayer money by streamlining processes to deliver cutting-edge products within five years. The water jets project began in 2007, and the delivery last month to the shipyard marked its successful completion.

Next up for the water jets will be full-scale sea trials on Milwaukee (LCS 5), expected to occur in the next 24 months.

Eventually, the water jets could end up on 10 LCS under contract to be built by Lockheed Martin.

The Department of the Navy’s Office of Naval Research provides the science and technology necessary to maintain the Navy and Marine Corps’ technological advantage. Through its affiliates, ONR is a leader in science and technology with engagement in 50 states, 70 countries, 1,035 institutions of higher learning and 914 industry partners. ONR employs approximately 1,400 people, comprising uniformed, civilian and contract personnel, with additional employees at the Naval Research Lab in Washington, D.C.

 




All of this week's top headlines to your email every Friday.


 
 

 
NASA/Boeing image

NASA wraps up first green aviation tests on Boeing ecoDemonstrator

NASA/Boeing image NASA’s recent green aviation tests included the Active Flow Control Enhanced Vertical Tail Flight Experiment, for which 31 tiny devices called sweeping jet actuators were installed on the tail of a Boein...
 
 
onr-locust

LOCUST: Autonomous, swarming UAVs fly into the future

A new era in autonomy and unmanned systems for naval operations is on the horizon, as officials at the Office of Naval Research announced April 14 recent technology demonstrations of swarming unmanned aerial vehicles (UAVs) ...
 
 
NASA photograph by Ken Ulbrich

Second X-56A MUTT makes first flight

NASA photograph by Ken Ulbrich NASA researchers are using the X-56A, a low-cost, modular, remotely piloted aerial vehicle, to explore the behavior of lightweight, flexible aircraft structures. Researchers at NASA’s Armstrong ...
 

 
Air Force photograph by Rebecca Amber

Schaefer takes command of 412th Test Wing

Air Force photograph by Rebecca Amber Maj. Gen. Arnold Bunch Jr., Air Force Test Center commander (left), presents the 412th Test Wing guidon to Brig. Gen. Carl Schaefer signifying the beginning of his new command at the 412th ...
 
 

NASA creates partnership to advance composite materials for aircraft of future

NASA has established a public-private partnership with five organizations to advance knowledge about composite materials that could improve the performance of future aircraft. Composites are innovative new materials for building aircraft that can enhance strength while remaining lightweight. The agency selected the National Institute of Aerospace in Hampton, Va., to manage administration of the...
 
 

NASA awards IT contracts to 118 small, disadvantaged businesses

NASA has awarded 118 contracts to small, disadvantaged businesses under Solutions for Enterprise-Wide Procurement (SEWP V), a multi-award Government-Wide Acquisition Contract vehicle focused on information technology products and product-based services. Of these SEWP V contracts, 14 were awarded to businesses operating in historically underutilized business zones, 25 contracts were awarded to b...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>