ARE THE EXISTING METHODS TO OBTAIN MAXIMUM PROPULSION EFFICIENCY APPROPRIATE?
A review of existing methods used to obtain high propulsion efficiency is given. The use of data from systematical propeller series to obtain optimum propeller main dimensions is discussed and compared with propeller design by methods based on lifting line and lifting surface theory. Various deficiencies and particularly those introduced by viscous effects are illustrated by comparisons between theoretical calculaltions and model tests. The investigation includes some results from propeller tests performed within a range of Reynold's numbers, flow visualisation tests ans tests with various kinds of turbulence stimulators for two- and five-bladed propellers. Model testing techniques and scaling methods in use are discussed and practical examples on the optimisation of propeller diameter or shaft speed are given. In conclusion, the influence of radial load distribution on propeller efficiency is examined.
- Soc. N.A.M.E. Paper No. E-3 presented at Combined Symposium on Ship Costs and Energy, New York, 30 Sept.-1 Oct. 1982 (21 pp., 28 ref., 7 tab., 16 graphs, 2 diag.)
- Fagerjord, O
- Andresen, K
- Publication Date: 1982
- Subject Areas: Marine Transportation;
- Accession Number: 00684633
- Record Type: Publication
- Source Agency: British Maritime Technology
- Files: TRIS
- Created Date: Aug 14 1995 12:00AM