Marine link
 

Propellers

New Propeller Optimization Process Can Analyze 10,000 Designs a Day

Propellors1 WEB.jpg

A newly developed propeller optimizer makes it much faster to identify propeller-hull reactions and reach design decisions. In the EU project STREAMLINE the fuel efficiency of a chemical tanker was improved by optimizing the hull form and propeller. To this end, MARIN used its hull optimization program PARNASSOS EXPLORER and a newly developed propeller optimizer. The hull form itself was optimized for low resistance and for having a wake field as rotationally symmetric as possible, while simultaneously maintaining the displacement and sufficient space for the engine room. Meanwhile, the propeller was required to deliver the right thrust at the same ship speed and engine rate of revolutions. Normally, the propeller designer starts when the hull lines have been set and the main propeller parameters have been decided upon. These parameters follow from series analysis, such as the Wageningen B-Series, plus hands-on experience and rules of thumb to estimate the effect of propeller-hull interaction. For instance, the sector knows that the best propeller diameter in a wake field is smaller than given by the propeller series. Once the main dimensions are selected, the designer continues to mold the geometry until the efficiency is high and the hindrance from cavitation is as low as possible. This is a time-consuming process that is particularly ill-suited to finding the best propeller when considering 500 hull form variations can be generated, as was the case here


CP Propeller Drive Celebrates 100 Years

MAN B&W Diesel has been part of the propeller business from the very beginning. The first Alpha Controllable Pitch Propeller was produced in 1902 and patented in 1903. In the meantime, more than 6500 MAN B&W propellers have gone into service. A great variety of CP Propellers with Propulsion Control Systems for all applications up to to-day’s 30 000 kW range. On 3 December 1903 the CP Propeller patent came into force


Mercury Marine Acquires Teignbridge Propellers

Mercury Marine announced today that it has acquired Teignbridge Propellers Ltd., headquartered in Newton Abbot, United Kingdom. Teignbridge Propellers produces bronze and Nibral (nickel, bronze, aluminum) propellers for yachts, patrol boats and commercial vessels. In addition to its line of standard and custom propellers, Teignbridge also produces a complete underwater package of stern gear for inboard-powered vessels, which includes rudders, shafts, struts, seals, logs and bearings.


New Fixed Pitch Propeller Design from Wärtsilä

Wärtsilä introduced the FPP Opti Design, a new fixed pitch propeller (FPP) design concept. According to Wärtsilä, the new design offers fuel savings of up to 4 percent and highly reliable full scale performance predictions. The concept has been developed utilizing the latest computational fluid dynamics (CFD) technology. The Wärtsilä FPP Opti Design has been developed at the company’s Technology and Service Centre in the Netherlands


Wärtsilä Propellers to Drive Greek Tankers

A Wärtsilä Fixed Pitch Propeller fitted with the EnergoProFin. Photo Wartsila

TMS Tankers Ltd, one of the largest Greece based shipping fleet operators, has selected Wärtsilä fixed pitch propellers (FPPs) for its new vessels under construction in China. The order was placed with Wärtsilä's joint venture company in China, Wärtsilä CME Zhenjiang Propeller Co Ltd (WCME), in December 2015. Other leading Greek shipping companies have also recently opted for Wärtsilä FPPs.


Tests Prove CLT Prop Characteristics

The CLT propeller recently underwent real-world testing, which proved, according to its designer and manufacturer that the propeller can help to reduce or eliminate hull-induced vibrations and noise levels. Independent studies were conducted aboard Superfast Levante, which demonstrated that: the cavitation level developed on the CLT propeller blades is negligible from the ship's structural integrity point of view; vibration and noise levels are excellent in terms of comfort on board; and the


Quick Propeller Repair Prevents Drydocking

One of the propeller blades was missing parts of its tip. (Photo: Hydrex)

Recently a team of Hydrex diver/technicians performed a propeller blade cropping on a 190-meter container bulker berthed in Hamburg. Two parts of the tip of one of the four propeller blades were damaged and needed to be cropped to restore the propeller’s efficiency.    Having developed different procedures for different kinds of damage, Hydrex teams are equipped and trained to make the best out of a bent or broken propeller


India Tankship to Retrofit MAN Kappel Propeller

MT Jag Lavanya: Photo credit MAN Diesel & Turbo

MAN Diesel & Turbo’s PrimeServ retrofit team is to supply India's Great Eastern Shipping Company (GESCO) of Mumbai with an upgrade retrofit propeller for their tankship 'Jag Lavanya', a Samsung 2004- built 105,000 dwt crude oil carrier.
 Kappel fixed pitch propellers
 MAN Diesel & Turbo recently announced a strategic focus that added the Kappel design to its fixed-pitch propeller portfolio, both for newbuildings and as a retrofit solution to vessels already in service


A Heavyweight on Display at SMM

csm_sm14_eingang_b974363432.jpg

On Thursday morning a huge mobile crane placed the five-blade ship propeller in front of the main entrance of Hamburg's fair center, Hamburg Messe. The propeller is a head-turner at this year's SMM, the leading international trade fair of the maritime industry. Weighing in at around 80 metric tons, with a diameter greater than nine meters and a total blade surface area of 42 square meters, the ship propeller made by Mecklenburger Metallguss GmbH (MMG) is an impressive head-turner at this


MAN Propulsion Packages for New Icelandic Trawlers

New Icelandic trawler rendering courtesy of MAN

MAN Diesel and Turbo inform that Icelandic owners, HB Grandi, Vinnslustodin hf. and Hradfrystihusid Gunnvör, have ordered newbuildings based on two different ship designs from specialist fishing-vessel consultants and designers, Nautic and Skipasýn. Optimised for safety, operational economy and pulling power, the 50-metre-plus vessel series differ in their choice of specified propeller, aft-ship and propeller-nozzle configurations


Hornblower Flagship Retrofits with Thordon's Shaft Seals

Inspiration Hornblower has converted to the maintenance-free TG100 mechanical tail-shaft seals (Photo: Thordon Bearings)

Thordon Bearings’ US West Coast Distributor, Pacific Marine Equipment has successfully completed the installation of a pair of TG100 mechanical propeller shaft seals to Hornblower Cruises & Events’ 1000-passenger capacity twin screw flagship, Inspiration Hornblower.


MAN's G-Type Engine Notches 1,500 Orders

Illustration of the G80ME-C9 engine (Photo: MAN Diesel & Turbo)

Just six years after its introduction, MAN Diesel & Turbo has confirmed an order for the 1,500th G-type engine. Greek ship operator, Almi Tankers, will take delivery of the ultra-long-stroke 7G80ME-C9 type as prime movers for the two 317


Wartsila Wins Deal for Four LNG Tankers

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

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


Vision of the Fjords: 2016 Ship of the Year

Vision of The Fjords (Photo: The Fjords)

 Vision of The Fjords, a futuristic carbon fiber tourist vessel operated by The Fjords DA, has won the Ship of the Year 2016 accolade at SMM in Hamburg.   The 40-meter-long, 399-passenger-capacity hybrid craft, which was completed by Brødrene Aa this summer


MN100: ZF Marine Propulsion Systems

Wolfgang Schmid (Photo: ZF)

The Company: ZF Marine supplies propulsion system components for yachts, defense craft, high-speed ferries, workboats and commercial vessels, in a power range from 10 to 14,000 kW. The product portfolio includes a comprehensive range of transmissions (reversing, non-reversing and hybrid)


DNV GL Awards AIP for HMD’s Feeder Design

From left to right: Ole Grøne, Senior Vice President, Promotion & Sales at MAN Diesel &Turbo; Trond Hodne, DNV GL Business Director Maritime; Dug Ki Min, Vice President of the Initial Planning and Initial Hull Design Dept. at HMD; and Henning Kuhlmann, Managing Director at Becker Marine Systems (Photo: DNV GL)

Today at the SMM trade fair in Hamburg, DNV GL presented Hyundai Mipo Dockyard (HMD) with an Approval in Principle (AIP) recognizing the technical feasibility of the new Con-Green 2000 vessel design under the new DNV GL rules. The Con-Green 2000 project brought together partners HMD


MAN Commissions Siemens to Supply Two-speed Gearbox for Vessel

MAN equips the boat with a 6,000 kilowatt (kW) MAN engine.

Siemens provides with an order from MAN out its expertise in the construction of switchable special gears. Flender two-speed transmission are individual, switchable solutions for displaying different operating modes for specialized vessels. Various translations in a transmission enable different


Thordon Launches New Service/Support Concept

Canada’s Thordon Bearings has introduced a global service and support (GSS) service to assist ship owners, shipbuilders and repair yards with the installation, commissioning, maintenance and shaft/stern tube alignment services of the full range of oil and grease-free Thordon propeller shaft


ABB Debuts New Azipod Propulsion Model

Azipod XL (Photo: ABB)

ABB’s newly launched Azipod propulsion unit is said to be up to 10 percent more efficient than previous versions. ABB hopes to expand the appeal of the podded electric propulsion system beyond established markets with its improved efficiency and bollard pull.  


DNV GL and Hempel to Cooperate for ISO 19030

Pic:  Hempel

 As a leading coatings manufacturer, Hempel pioneered the performance guarantee based on achieving efficiency savings from maintaining a fouling-free and smooth hull.    Therefore, Hempel warmly welcomes the introduction of this internationally recognised and accepted set of


Embracing New Hull & Propeller Performance Criteria

Logos

ISO 19030 – to be published shortly – defines a set of fully transparent methodologies to measure changes in hull and propeller performance. As a leading coatings manufacturer, Hempel pioneered the performance guarantee based on achieving efficiency savings from maintaining a


Underwater Inspections a Boon - Hydrex

Courtesy Hydrex

Building upon conventional technical skills and know-how while also taking advantage of the latest technology, Hydrex offers a unique hull monitoring service to its customers. This gives shipowners total control of their ship's hull condition and consequently its performance


MN100: Nautican

(Photo: Nautican)

The Company: Nautican engineers and manufactures hydrodynamic solutions that increase power and maneuverability, while significantly reducing fuel use and maintenance needs. Nautican offers Integrated Propulsion Units, High Efficiency Nozzles and Propellers, high aspect ratio Triple Rudders


Caterpillar to Power Stena Line's New RoPax Ferries

(Photo: Stena Line)

Caterpillar Marine has announced Cat power solutions have been selected to power four 3100 LM RoPax Ferries for Stena Line. Each ferry will be equipped with two MaK 12 M 43 C propulsion engines.   “By combining a set of proven technologies Caterpillar’s solution will provide


W&O Promotes Key Associates

Lori Ulrich (Photo: W&O)

W&O, a distributor of pipe, valves, fittings as well as automation and engineered solutions, announced the promotion of two associates: Lori Ulrich to Director, Human Resources and Tammy Emerson to President, Propeller Club of Jacksonville






 
rss feeds | archive | privacy | history | articles | contributors | top news | contact us | about us | copyright