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.


People & Company News

Kongsberg Performs Well in Q2

Norwegian defence and marine technology company Kongsberg Gruppen's second quarter 2016 (Q2) financial results shows sales performance broadly in line with recent trends,

Rickmers Holding, E.R. Capital Drop Merger Plan

Rickmers Holding AG and E.R. Capital Holding have jointly decided not to pursue the merger of their ship management activities.   For many years the companies

MN100: Conrad Shipyard

The Company: Conrad Shipyard was established in 1948 and is headquartered in Morgan City, Louisiana. The company designs, builds and overhauls tugboats, ferries,

New Products

Maersk Line's Innovative Smart Reefers

Have you heard about Maersk Line's smart reefers that can listen and talk? Cutting edge technology that reduces risk in customer supply chain, claims Maersk Line.

SMM 2016: World Premieres from around the Globe

Some 50,000 trade visitors from the whole of the world are expected in Hamburg for the start of SMM in less than two weeks. And once again, it is fully booked – with a total of more than 2,

Tuco’s New Arctic Workboat to Debut at SMM

Danish producer Tuco Marine said it will reveal a new Arctic workboat daughter craft at next month’s SMM in Hamburg.   Many arctic patrol vessels, icebrakers

Marine Propulsion

C-Job Designs Flettner Freighter for Switijnk

The Dutch shipping company family Switijnk has contracted C-Job Naval Architects to develop a Rotor Sail-equipped design to meet their specific loading and sailing profile.

MN100: R.W. Fernstrum & Company

The Company: R.W. Fernstrum & Company set the standard in marine heat exchangers over 65 years ago, building a reputation focused on innovation. Today, its commitment is to continual improvement,

SMM 2016: World Premieres from around the Globe

Some 50,000 trade visitors from the whole of the world are expected in Hamburg for the start of SMM in less than two weeks. And once again, it is fully booked – with a total of more than 2,

Marine Power

MN100: R.W. Fernstrum & Company

The Company: R.W. Fernstrum & Company set the standard in marine heat exchangers over 65 years ago, building a reputation focused on innovation. Today, its commitment is to continual improvement,

US Navy Ships Conduct Astern Replenishment-at-sea

“While replenishments-at-sea are routine, astern refueling is unique and requires precise navigation and coordination,” said Lt. Cmdr. Jason Ileto, fleet replenishment scheduler for Commander,

Better Turbocharger Performance, Proven Tech

Engineer wisdom: Nothing is worse as the right idea at the wrong time. But with the new ECOCHARGE Two-Stage Turbocharging System MAN D&T has reached both goals.

Maritime Safety

Indian Cargo Ship Sinks Off Oman

An Indian cargo ship loaded with vehicles and food supplies destined for Yemen sank on Saturday off the coast of Oman but without loss of life, Oman’s ONA state news agency reported.

Danish Maritime Authority Supports Maritime Cultural Days

The Danish Maritime Authority's buoy tender ’POUL LØWENØRN’ will be alongside in Korsør in connection with the Maritime Cultural Days. The vessel will be open to visitors throughout Saturday,

ABS Makes it Safer to ‘Walk to Work’

ABS announced the publication of The ABS Guide for Certification of Offshore Access Gangways. The new Guide addresses certification for safety systems used for “walk to work” (W2W) crew transfers.

Ferries

Croatia’s Jadrolinija to Buy New Passenger Ship

Croatia’s  largest national passenger shipping company Jadrolinija plans to expand its fleet with a new passenger ship, with the total cost of about 50 million euros, reports Poslovni.

Fire-stricken Ferry Moored Safely

The fire aboard the passenger vessel ferry Caribbean Fantasy has been extinguished, and the vessel has been moored safely at Pier 15 in San Juan Harbor, the U.S.

Austal JV Wins First Ferry Contract

Aulong Shipbuilding, a joint venture company formed by Austal Limited and Guandong Jianglong Shipbuilding of Zhuhai, China, has won the first ferry contract to

 
 
Maritime Careers / Shipboard Positions Maritime Security Naval Architecture Navigation Offshore Oil Pipelines Pod Propulsion Port Authority Shipbuilding / Vessel Construction Winch
rss | archive | history | articles | privacy | 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: 0.1149 sec (9 req/sec)