Wednesday, November 20, 2019

Fluid Dynamics News

Two new Robert Allan Ltd custom-designed pusher tugs are now being operated along the Amazon River system by Hidrovias do Brasil S.A. (Photo: Robert Allan Ltd)

New Pusher Tugs for Hidrovias do Brasil

Hidrovias do Brasil S.A. has started operating two new pusher tugs custom-designed by Vancouver, Canada based Robert Allan Ltd, pushing barges containing bulk products along the Amazon River system. This HB PIRARARA shallow-draft pusher tug and sister vessel HB PIRARUCU have a Robert allan RApide 4000-Z3 tug design and were constructed by Estaleiro Rio Maguari in Belem, Brazil.Computational Fluid Dynamics (CFD) simulations were used in the early phases of the design work to optimize the hull shapes and minimize total convoy resistance…

Photo: Teignbridge Propellers

Teignbridge Propels Interest at HRV1 Sea Trial

Torbay Harbour and Royal Torbay Yacht Club // Teignbridge Propellers hosted a group of members of the marine community recently to experience the HRV1 research vessel in action. Guests were able to see live-action, first-hand data onboard the  MCA category 4 coded catamaran. Back on shore at the Royal Torquay Yacht Club, Teignbridge explained how data from physical testing on-board HRV1 is coupled with numerical simulation tools in an integrated design workflow to deliver high performance propellers.

Photo: MiNO Marine

Conrad to Build 'MiNO 6000' Towboat

MiNO Marine LLC said the second vessel based on its new 6000 hp inland towboat design has been contracted for and production will begin soon at Conrad Amelia Shipyard. The MiNO 6000 Class Towboat design is a modern, Subchapter M compliant vessel measuring 166 x 49 ft. with a 12-ft. depth.The towboat will be propelled by a pair of conventional propellers within Kort nozzles each driven by a 3000 hp, Tier IV compliant engine. The first vessel is fitted with EMD engines, while the second will be fitted with GE engines.The house is divided into two sections, one floating and one fixed.

Photo: SCHOTTEL

SCHOTTEL Expands High-Performance Nozzle Range

With the launch of the newly developed SDC40 nozzle, SCHOTTEL expands its range of high-performance nozzles. The SDC40 sets new standards in terms of compact design and free running efficiency – and thus even leads to reduced operating costs compared to the nozzles of other market participants. The SDC40 nozzle also stands out with its optimally designed propeller geometries and exceptional performance characteristics. It comes equipped with SCHOTTEL patented ProAnode as standard…

The power rating of up to 5500 kW provides the Wärtsilä WTT series of thrusters with the thrust needed for outstanding manoeuvrability. Image: Wärtsilä

Wärtsilä Supplies Transverse Thrusters for Cruise Ships

The technology group Wärtsilä has received orders to supply more than sixty of its transverse thrusters for twelve new cruise ships being built in four shipyards on behalf of six different owners during the past year.This represents the dominant share of newbuild vessels within the cruise sector during this period. The efficiency and performance of Wärtsilä’s transverse thrusters is particularly important for large cruise ships, since manoeuvring and mooring in often crowded harbours…

Photo: Incat

"Saint John Paul II" Delivered to Virtu Ferries

Incat delivered its latest large fast ferry, a 110-meter catamaran for Virtu Ferries of Malta dubbed Saint John Paul II.Saint John Paul II is the 44th large commercial fast ferry delivered by Incat and the sixth in excess of 5,500gt in the past decade; a decade also shared with 19 other Incat newbuilds of smaller passenger ferries and support vessels.“Using the latest computational fluid dynamics (CFD) and hydrodynamic free-running model test techniques, the well proven Incat Wave Piercing Catamaran hullform has been further developed for Mediterranean winter conditions…

Rendering of the new Pasha Hawaii containership (Image courtesy Pasha Hawaii)

MAN to Deliver Propulsion for Pasha’s LNG Containerships

MAN Energy Solutions said it has won an order to provide the propulsion systems for two new liquefied natural gas (LNG) fueled containership newbuildings, which will join the fleet of Pasha Hawaii, the U.S. Jones Act carrier in the Hawaii trade lane.Each system will comprise a 7S80ME-GI Mk 9.5 main engine, three MAN 6L35/44DF GenSets and an MAN Alpha FPP propeller system. The 2,525-teu vessels will be constructed at the Keppel AmFELS yard in Brownsville, Texas to Keppel's proprietary design.Bjarne Foldager – Vice President…

(Photo: MAN Diesel & Turbo)

MAN Introduces the 'Game Changer'

What would Rudolf Diesel say if he could see and compare his engine versus todays’ newest diesel engine development from MAN Diesel & Turbo? As the Augsburg based engine maker claims, “A cylinder output of 1,300 kW this engine puts us to the top.” The largest version of the new engines is a 20-cylinder unit (20V45/60) comes with a limit-pushing power output of 26 MW. The new MAN 45/60CR range is a striking combination of top performance, operational flexibility and reliability.

(Photo: MAN Diesel & Turbo)

MAN Unveils Its New Flagship Engine

MAN has revealed the successor to its 48/60CR engine in the company’s 4x line of high-performance diesel engines. The MAN 45/60CR marine diesel engine will initially be available as 12V and 14V versions that boast power outputs, of 15,600 and 18,200 kW respectively, with inline versions following at a later stage. According to Wayne Jones, Chief Sales Officer of MAN Diesel & Turbo, “The new engine combines the best features of the current 48/60CR, such as MAN’s common-rail system with ECOMAP capability…

(Photo: MAN Diesel & Turbo)

Moving Ahead Powerfully

The layout of ship propellers is a balancing act between optimal power conversion and the avoidance of unwanted cavitation effects, which can result in damage to the propeller structure and higher noise levels. MAN Diesel & Turbo in Frederikshavn, Denmark, is using the computational fluid dynamics (CFD) simulation solution STAR-CCM+ from Siemens PLM Software to model cavitation and optimize ship propellers. Two mid-size container ships of 8,500 TEU – CSCL Europe and CSCL America – will be upgraded by retrofitting a efficient Kappel propeller.

Computational fluid dynamics (CFD) allows to assess the details of the flow. The colors denote the pressure distribution on the hull. Image: DNV GL

DNV GL Adds Asymmetric Stern To ECO Lines

A vessel with an asymmetric stern has a twisted aft shape that is designed to account for the differing flow conditions on each side of the propeller. The idea emerged in the 1960s, but due to the difficulty of manually developing the optimal shape, this design failed to make a large impact at the time. DNV GL has revisited the idea and, using high-fidelity computer fluid dynamics (CFD) in combination with parametric formal optimization, the classification society can now offer ship owners the option of incorporating an asymmetric stern into their new vessels.

Image: Jensen Maritime Consultants

San Francisco’s New Fireboat is Like No Other

San Francisco’s Jensen-designed super pumping fireboat is like none that came before her. As a result, the City by the Bay is prepared like never before, for its next crisis. Christened on October 17, appropriately enough on the anniversary of the 1989 Loma Prieta earthquake, the city of San Francisco’s first new fireboat in almost 60 years is an especially unique boat, designed and built for a specific purpose. When the infamous quake burst the domestic water lines beneath San Francisco…

Promas System (Photo: Rolls-Royce)

Rolls-Royce to Equip Five New Cruise Ships

Rolls-Royce has announced a new deal to provide propulsion and deck machinery to five cruise ships being built by Fincantieri at their Monfalcone and Ancona Shipyards in Italy. The firm orders are to supply a Promas system, deck machinery and steering gear to two vessels being built for Viking Ocean Cruises. The contract also covers steering gear and deck machinery for a further vessel under construction for Regent Seven Seas Cruises. Steering gear is also being provided for two vessels being built for Princess.

Wärtsilä will deliver a comprehensive scope of marine solutions from its own portfolio to four new LNG fuelled tankers for Swedish owners

Wartsila Wins Deal for Four LNG Tankers

Wärtsilä has been awarded a contract covering four newbuild tanker vessels. The ships are to be built at the Avic Dingheng shipyard in China, on behalf of three Swedish owners; Furetank (two vessels), Älvtank, and Thun Tankers, a fully owned subsidiary of Thunbolagen. The vessels will be commercially managed by Furetank Chartering in the Gothia Tanker Alliance. The contracts were signed in the second quarter of 2016. The ships will fulfil the IMO's Tier III requirements and will be fuelled primarily by liquefied natural gas (LNG). The scope of Wärtsilä's supply to this project is extensive.

Image: Thordon Bearings

Pods Versus Water Lubricated Props

Thordon Bearings has called on the marine industry to investigate the characteristics of both conventional seawater-lubricated propeller shaft systems and podded propulsion arrangements in order to provide shipowners with a better understanding of the two very different propulsion configurations. In a recently published White Paper, the Canadian manufacturer of the COMPAC seawater-lubricated propeller shaft bearing system believes there is a great opportunity for independent comparative data so that cruise ship operators, in particular, can make more informed procurement decisions.

Photo: SCHOTTEL

SCHOTTEL Presents VarioDuct Nozzle

The new SCHOTTEL VarioDuct SDV45 high-performance nozzle is now available in the Rudderpropeller range from the German propulsion specialist SCHOTTEL. It offers provable higher efficiency at open-water speed combined with very good bollard pull values. In conjunction with optimally designed propeller geometries, the outstanding performance characteristics of the nozzle come to the fore. Given the same propulsive power, it has a greater bollard pull than the thrust of previous nozzles and, at the same time, offers considerably greater efficiency in the medium and high speed range.

The Carrousel Towing System system eliminates risk of capsizing under  tow load. In combination with two Voith Schneider Propellers arranged in-line, the tug design allows for a slender and highly efficient hull Photo Voith

Evolutionary Carrousel RAVE Tugs Under Construction

In cooperation with R. Allan Ltd. (RAL) and Novatug B.V., Voith participated in the development of a new tug. The Carrousel RAVE Tug (CRT) is characterized by a towing winch on a ring. This ring can rotate freely around the tug's deckhouse – a unit referred to as the "Carrousel Towing System". This system eliminates the risk of capsizing under a tow load. In combination with two Voith Schneider Propellers (VSPs) arranged in-line, the tug design allows for a slender and highly efficient hull.

The WTT-40 addresses market requirements for high power transverse thrusters for bow and stern applications

Wärtsilä Launches WTT-40 Transverse Thruster

Wärtsilä is launching its new Wärtsilä WTT-40 transverse thruster. The first WTT-40's have been ordered and are scheduled for delivery during 2016. This first variant is part of Wärtsilä's new transverse thruster series and features a 4000 kW power level and a 3400 mm diameter controllable pitch propeller, neither of which have been available in Wärtsilä's current product range. While Wärtsilä has designed and built large, up to 5500 kW, transverse thrusters as customised versions…