Voith Announces First Linear Jet Order

press release
Tuesday, February 28, 2012

A new propulsor for 20 to 40 knots with the simplicity and efficiency of a propeller.
 

Voith has announced the first Voith Linear Jet order with Turbine Transfers UK for a 19 meter BMT Nigel Gee designed Wind Support Vessel. The Voith Linear Jet will provide for this application a substantial higher bollard pull without a requirement for increased installed power. This higher bollard pull will allow Turbine Transfers the safe transfer of personnel up to higher seastates. Turbine Transfers - a wholly owned subsidiary of Holyhead Towing Company - currently operates a fleet of over 20 fast catamarans that transport personnel and equipment to and from offshore wind turbines. Its long term customers include Siemens, RWE npower, Van Oord, Dong Energy, EnBW and Royal Boskalis Westminster.


The Voith Linear Jet (VLJ), a new ship propulsor, will give Naval Architects new ways to optimise their vessel designs. The VLJ employs the simplicity and efficiency of a conventional propeller installation, yet delivers the possibility to design for 40 knot top speeds without the shake, rattle and roll of an extreme power-dense propeller. Similar to a propeller, the efficiency is at a constant high level relative to the ship speed. This gives a VLJ equipped ship a considerable range advantage against its waterjet sister vessel. Typical VLJ applications will be any ship with a mixed operating profile between low speed cruising and sprint speeds like Navy and Coastguard vessels and Yachts. Ferries operating at Voith Turbo sustained speeds around 30 knots employing high-speed or medium speed Diesel or LNG engines will also benefit of this new propulsion option.


The Voith Linear Jet takes away some of the disadvantages of traditional waterjets, without compromising the vessel’s top and sprint speed ability. The considerable higher efficiency at low-end cruising speeds will provide a positive design spiral for light weight craft. Smaller fuel tanks for the same range, reduce vessel displacement resulting in increased hull efficiency with ensuing increased range and top speed. The low sensitivity for marine growth and the low installation complexity provides lower maintenance costs and high availability. With the VLJ now it is possible to safely replace the conventional propeller for high speed applications, delaying the necessity to switch to waterjets until the required ship design speeds are well above 40 knots.

 

  • The Voith Linear Jet Numercial Towing Tank

 

The successful hull integration of any propulsor is of prime importance for a Naval Architect when issuing a speed guarantee to his customers. Hull interaction effects between propulsor and hull are difficult to predict, with issues like cavitation further complicating a reliable prediction. Assisting the Naval Architect with making the performance predictions, Voith has developed a powerful “Numerical Towing Tank” in Computational Fluid Dynamics (CFD) optimised for the performance prediction of the Voith Linear Jet in any hull form. The VLJ Numerical Towing Tank is validated with several hull forms, with cavitation tunnel tests at tank test institutes and with VLJ self propelled hulls. For any customer specific project the VLJ Numerical Towing Tank generates a full report including cavitation inception at various operating conditions, including hull sinkage and trim influences and also performance analysis for the various possible VLJ hull positions, integration depths and shaft angles. The aim is to assist the Naval Architect in optimising the vessel and to jointly pursue success for every project.

Maritime Reporter February 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

People & Company News

Coast Guard Academy Cadet to Receive Fulbright Scholarship

Stephen Horvath, a first class cadet at the U.S. Coast Guard Academy, was recently granted a two-year Fulbright Scholarship to study renewable energy technologies

Ecochlor Presents BWTS Case Study at CMA

Ballast water treatment technology developer Ecochlor Inc. presented a project case study yesterday at CMA Shipping 2015 in Stamford, Conn. The case study covered

Golden Ocean and Knightsbridge Complete Merger

The merger between Knightsbridge Shipping Limited and Golden Ocean Group Limited was approved today at special meetings of both companies' shareholders.      The new company,

New Products

Cruise Giant Carnival to Expand its Fleet

The world's largest cruise ship company Miami-based Carnival Corp. has signed agreements with German and Italian ship builders to build nine new ships over a four-year period, starting in 2019.

ABB, Samsung SDI JV to Develop Microgrids Globally

ABB and Samsung SDI have signed a Memorandum of Understanding to promote microgrid solutions globally. The two companies will establish a global commercial alliance

Wärtsilä's' New Plant in Brazil

Following an investment of 20 million euros, Wärtsilä's' new unit will produce and test motor generators and thrusters   Wärtsilä's first unit at Porto do Açu in São João da Barra (RJ),

Marine Power

Indonesia Partners with China on Maritime

Indonesian President Joko “Jokowi” Widodo and Chinese President Xi Jinping pledged increased maritime cooperation during the formers visit to China.   The joint

Wärtsilä's' New Plant in Brazil

Following an investment of 20 million euros, Wärtsilä's' new unit will produce and test motor generators and thrusters   Wärtsilä's first unit at Porto do Açu in São João da Barra (RJ),

Kvichak to Build Catamaran Research Vessel

Kvichak Marine Industries, Inc. was recently awarded a contract for construction of a 60’ aluminum catamaran research vessel for the California Department of Water

Maritime Safety

Indonesia Partners with China on Maritime

Indonesian President Joko “Jokowi” Widodo and Chinese President Xi Jinping pledged increased maritime cooperation during the formers visit to China.   The joint

Greek Ferry Runs Aground in the Aegean

A Greek ferry ran aground on the Aegean island of Kassos overnight, the AP is reporting.      None of the 227 passengers and 55 crew were injured and a tug

US Will Work to Ensure Bab-el-Mandeb Strait Remains Open

The U.S. military will work with Gulf and European partners to ensure the strategic Bab el-Mandeb Strait at the tip of the Red Sea remains open to commerce despite fighting and instability in Yemen,

Ferries

Greek Ferry Runs Aground in the Aegean

A Greek ferry ran aground on the Aegean island of Kassos overnight, the AP is reporting.      None of the 227 passengers and 55 crew were injured and a tug

Working Harbor Committee to Screen "Liemba!"

The Working Harbor Committee is presenting a screening of the documentary film "Liemba!" on Tuesday, March 31 at the Community Church of NY. The screening will

Condor Sets Sail from Weymouth for the Last Time

Condor Ferries have made their final sailing from Weymouth. Cross-channel ferry services from Weymouth have come to an end with the final sailing to Guernsey.   Condor

 
 
Maritime Contracts Maritime Security Maritime Standards Navigation Offshore Oil Pipelines Ship Electronics Ship Repair Sonar Winch
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1676 sec (6 req/sec)