HYDRODYNAMICS RESEARCH FACILITIES IN DENMARK AND SWEDEN.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 17, 1968
- Accession Number
- AD0835382
Entities
People
- Frederick H. Todd
Organizations
- Office of Naval Research