Examining Hull Pressure on the Staten Island Ferries

By Rien de Meij, MARIN
Tuesday, January 21, 2014
MARIN’s Depressurized Wave Basin was the site for a test of the best propulsor configuration for the Staten Island ferries.

For the first time an investigation into Voith Schneider Propulsor-induced hull-pressure fluctuations has been carried out. This investigation was part of a New York City Department of Transportation (NYCDOT) study to retrofit the Molinari Class Ferries, which operate to the world-renowned Staten Island, with Voith Schneider Propulsion (VSP).
One of the objectives was to investigate the modification in terms of energy efficiency.
The Staten Island Ferry carries more than 21 million passengers annually between Staten Island and Lower Manhattan. The three sister ships, Guy V. Molinari, Sen. John J. Marchi and Spirit of America, can carry 4,427 passengers and have a crew of 16. The double-ended ferries have a propeller gondola, conventional propulsion system and one center skeg at both ends.
The study started by adapting the current hull lines for a propulsion arrangement consisting of four VSP26R5 units. After the lines were optimized, a 7.3 m long ship model was manufactured and a model test program for the optimization of the Voith Schneider propulsor arrangement was carried out in the Shallow Water Towing Tank.
The goal of these tests was to determine the best propulsor configuration, which requires the lowest shaft power at design speed, focusing on the best direction of rotation, thrust vector direction and power distribution between the fore and aft VSP units.
With the selected configuration, propulsor cavitation observations and measurements of the propulsor-induced hull pressure fluctuations were carried out in the Depressurized Wave Basin. Cavitation observations and measurements were performed on the portside aft propulsor, with all four VSPs active.
It was concluded that the level of the measured hull excitation caused by the two active aft VSPs is low.
The highest levels are measured on the center line of the ship, which is due to interaction between the portside and starboard VSP units.
This observation resulted in recommendations for a minimum spacing between the two aft propulsors.
The main advantage of the tested configuration, compared to the existing set up, is the increased maneuverability of the vessel.
These results supported the NYCDOT in its decision-making for future developments of the Staten Island Ferry.

 

(As published in the January 2014 edition of Maritime Reporter & Engineering News - www.marinelink.com)

  • Rien de Meij, MARIN

    Rien de Meij, MARIN

Maritime Reporter August 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Ship Repair & Conversion

Cook Joins Horizon Shipbuilding as Operations VP

Horizon Shipbuilding, Inc. announced that Mickey Cook has joined the corporation as the Vice President of Operations for the Bayou La Batre shipyard. Cook, one of the founders of C & G Boatworks,

Update: SS Central America Salvage

Odyssey Marine Exploration completes current phase of SS Central America recovery; 15,500+ gold and silver coins, 45 gold bars recovered to date; 161,000-square meter,

BAE Systems Awarded 'USS Hopper' Repair Contract

US Department of Defense informs BAE Systems Hawaii, Honolulu, Hawaii, is being awarded a not-to-exceed $22,905,907 undefinitized contract action to a previously

Marine Power

Ship Safety: IMO Committee Agree Draft IGF Code

IMO informs that the draft International Code of Safety for Ships using Gases or other Low flashpoint Fuels (IGF Code), along with proposed amendments to make the Code mandatory under SOLAS,

Cat, Deltamarin Develop Modular FPSO Power Unit

Caterpillar Launches New Modular Solution Developed with Deltamarin for FPSO and Offshore Platform Main Power at 2014 Rio Oil & Gas Expo and Conference Caterpillar

Gas Turbine Acceptance Test Completed for S. Korea Navy

Rolls-Royce has reached a milestone in the Republic of Korea Navy’s FFX frigate program, with the successful completion of acceptance tests for the MT30 gas turbine.

Naval Architecture

Austal Delivers Fourth JHSV to the US Navy

The U.S. Navy accepted delivery of USNS Fall River (JHSV 4) from Austal USA yesterday, a week shy of six months from the date they took delivery of JHSV 3. This

MN 100: Resolve Marine Group

1510 SE 17th Street, Suite 400 Fort Lauderdale, Fl 33316 Tel: (954) 764-8700  Email: info@resolvemarine.com Website: www.resolvemarine.com President & CEO: Joseph Farrell, Jr.

Green Passenger Ferries from Faaborg Vaerft

The first full-electrical passenger ferry in composite is delivered to Ballerina AB in Stockholm, Sweden. Faaborg Vaerft A/S has delivered the first full-electrical passenger vessel,

Vessels

Fifth Jackup Contract for Keppel from Gulf Drilling

Keppel FELS Limited, a wholly owned subsidiary of Keppel Offshore & Marine, has secured a contract from Gulf Drilling International Ltd. of Qatar to build a

Fugro Takes Delivery of 2nd Coastal Survey Vessel from Damen

Fugro yesterday took delivery of its second of the three Fugro Offshore Coastal Survey Vessels (FOCSV) being built by Damen. The Fugro Pioneer is a compact,

Austal Delivers Fourth JHSV to the US Navy

The U.S. Navy accepted delivery of USNS Fall River (JHSV 4) from Austal USA yesterday, a week shy of six months from the date they took delivery of JHSV 3. This

Ferries

Green Passenger Ferries from Faaborg Vaerft

The first full-electrical passenger ferry in composite is delivered to Ballerina AB in Stockholm, Sweden. Faaborg Vaerft A/S has delivered the first full-electrical passenger vessel,

Video: Vessel Operators Remember 9/11 Heroism

On the 13th anniversary of the terrorist attacks of September 11, America’s tugboat, towboat and barge industry pauses to remember the nearly 3,000 Americans who lost their lives,

Rolls-Royce Propulsion Systems for New Finnlines Ferries

Rolls-Royce says it has won a contract to install its efficient Promas Lite propulsion system on two vessels for ferry operator Finnlines. Promas Lite is an integrated

 
 
Maritime Careers / Shipboard Positions Maritime Security Maritime Standards Offshore Oil Pipelines Pod Propulsion Ship Simulators Shipbuilding / Vessel Construction 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: 0.2151 sec (5 req/sec)