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Stephen Ferguson, Consultant Engineer, CD-adapco. To become an Olympic Rowing champion you need two qualities in fair measure: grace and guts. More than any other sport, rowing combines sheer explosive power with fine technique. With winning margins measured in just tenths of a second, Gold Medals are traditionally won by working harder and suffering more than your opponents. At the last two Olympics, however, those rules have changed; blood, sweat and tears alone are good enough. Nowadays, the best teams have another weapon in their armory. At the Olympics, Computational Fluid Dynamics could...
Rodrigo Azcueta, Cape Horn Engineering. Let’s start with the basics. The race consists of 11 ocean Legs, 8 Inshore Races and 8 Pro-Am Races. All up, the boats have to sail about 39,000 miles on their trip around the globe. The race was originally known as the Whitbread Round the World Race and occurred for the first time in 1973. ( http://livesaildie.com ) Marine Special Report: Read more...
Rodrigo Azcueta, Cape Horn Engineering. At Cape Horn Engineering we have forgone traditional towing tank and wind tunnel tests in favor of an exclusively CFD-based design philosophy. Using STAR-CCM+ simulations are cheaper, faster and more reliable than traditional tests. We run all simulations at full scale which eliminates the inherent error in scaled test results. Enhanced flow visualization and force decomposition give designers much greater understanding of flow phenomena. Marine Special Report: Read more...
Bettar El Moctar and Tobias Zorn, Germanischer Lloyd AG, Hamburg. Milovan Peric, Tobias Zorn, CD-adapco, Nürnberg Office. Germanischer Lloyd was recently asked to solve a problem related to torsional vibrations on board a mega yacht. Marine Special Report: Read more...
Simone Bruckner, Francesco Serra - Azimut-Benetti, R&D Centre in Varazze (SV). Azimut-Benetti has been at the top of the world "mega-yacht" industry for over ten years: owning over 10% of the global market, and nearly 30% of the domestic market; the Italian company is the world boating industry’s largest private group, producing over € 800 million worth of yachts every year. Marine Special Report: Read more...
Bettar el Moctar, Jochen Marzi, Arndt Schumacher - Hamburg Ship Model Basin (HSVA). The America's Cup, dating from 1851, is the oldest trophy in international sport and is considered yacht racing's Holy Grail. In 2000, a German challenger started to work towards a future challenge, called Pinta Racing. An international team of experts for hull form design, sailing aerodynamics, and further technical resources was brought together to support an outstanding crew of internationally renowned sailors to challenge the cup holder. Marine Special Report: Read more...
Dr.-Ing. Reiner Schulz - Wartsila Switzerland Ltd. Sulzer two stroke diesel engines are used as "prime movers" in container ships, bulk carriers and tankers. Such ships need to be in service for as long as possible without stopping for a pre-scheduled overhaul, placing a continuous demand on engine developers in terms of reducing costs and at the same time improving reliability. CFD is a proven tool for minimizing experimental effort during the optimization of receivers, blowers, in-cylinder flow and lubrication systems. Marine Special Report: Read more...
Dan McGreer - Aker Yards Marine Recently, AYM investigated the effect of the propeller rotation direction on the Dynamic Positioning (DP) characteristics of a supply vessel. While general rules of thumb exist to guide designers on the effect of propeller rotation direction, the forces generated while in DP mode will vary depending on the hull form, the location of the skeg, and stern thruster location relative to the propellers. Marine Special Report: Read more...
Dan McGreer, Aker Yards Marine. Carrying cryogenic fluids such as LNG or LPG aboard a ship poses some unique design challenges. The extreme low temperatures of these fluids require low thermal conductivity insulation, and may also necessitate heating in various ship locations to prevent exotic steels from being required throughout the ship’s hull. The accurate determination of the heat transfer between the sea water, outside air, and the cargo is critical to ensure the tank and bulkhead arrangements are feasible. Marine Special Report: Read more...
Dan McGreer - Aker Yards Marine. During two recent projects, Aker Yards Marine was requested to evaluate the impact of different design parameters on vessel performance. The first analysis was to determine whether the location of a ship’s keel coolers had a detrimental effect on propeller inflow, and the second analysis was to determine the impact of skeg geometry on vessel performance. Marine Special Report: Read more...

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