Accession Number:

AD0835382

Title:

HYDRODYNAMICS RESEARCH FACILITIES IN DENMARK AND SWEDEN.

Descriptive Note:

Technical rept.,

Corporate Author:

OFFICE OF NAVAL RESEARCH LONDON (UNITED KINGDOM)

Personal Author(s):

• Todd, Frederick H.

Report Date:

1968-06-17

Pagination or Media Count:

29.0

Abstract:

At the Danish Towing Tank, items of interest included the application of numerical control methods to the cutting of ship models, a pneumatic wavemaker, experimental evaluation of anti-roll tanks, the use of smoke and wind tunnels, and a planar-motion mechanism for experiments on the directional stability of surface ships. At the Swedish Towing Tank the principal development is the installation of a new cavitation tunnel. This has two alternative sections, in the second of which a 23 ft self-propelled model of a ship can be placed for experiments on propulsion factors, propeller vibration forces, etc. Theoretical work has been carried out on ducted propellers while maneuvering and directional stability are being studied by analog computer techniques. The Chalmers Tech. Univ. at Goteborg has an open air towing tank some 300 ft in length, with a wavemaker which can generate oblique seas. Seakeeping tests are carried out in the nearby sea. The organization of the Swedish Ship Research Association is briefly described. The Karlstad Mekaniska Werkstad is well-known as the largest manufacturer of marine controllable pitch propellers. There is a well-equipped Propeller Laboratory, with a cavitation tunnel, and a numerically-controlled machine is being installed for cutting the blades of full-size C.P. propellers. Author

Descriptors:

• *TEST FACILITIES
• *HYDRODYNAMICS
• WIND TUNNELS
• WATER TUNNELS
• SHIP MODELS
• CAVITATION
• SHIP HULLS
• WATER WAVES
• STABILITY
• MANEUVERABILITY
• MARINE PROPELLERS
• VIBRATION
• SMOKE
• SIMULATORS
• DENMARK
• SWEDEN

Subject Categories:

• Marine Engineering
• Test Facilities, Equipment and Methods
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE