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The journal International Shipbuilding Progress (ISP) was founded in 1954. Each year two issues appear (in March and September). Publications submitted to ISP should describe scientific work of high international standards, advancing subjects related to the field of Marine Technology, such as:
- Concept development
- General design of ships and offshore objects
- Ship and offshore structural design
- Hydro-mechanics and -dynamics
- Maritime engineering and machinery systems
- Production processes of all types of ships and other objects intended for marine use
- Production technology and material science
- Shipping science, economics, and all directly related subjects
- Ship operations
- Offshore and ocean engineering in relation to the marine environment
- Marine safety
- Efficiency, lifecycle, and environment
- Ice-related aspects for ships and offshore objects.
The contents of the papers may be of a fundamental or of an applied scientific nature and must be of the highest novelty and rigor.
Authors: Cutland, R.S.
Article Type: Research Article
Abstract: In this paper, experiments to determine the relation between velocity in the boundary layer, the distance from the surface of the body, and the shearing stress at this surface are described. Various lengths of pontoon were used at two speeds, and the deduced law u u ∗ = 4.98 log u ∗ y v + 6.54 agrees very closely with that found by Ludwieg and Tillmann, but differs considerably from the more commonly used Nikuradse value. Velocities in the boundary layer of …two ships were also measured. The first was a trawler, two traverses being made at approximately the same distance from the bow, about 0.6 of the length of the ship. The traverse in the position on the flat bottom gave a typical velocity distribution curve, but that carried out in the side position showed marked fluctuations in the value of u U with increasing y . The second ship was an ore carrier, traverses being made in six positions around a girth about 0.3 of the ship’s length from the bow. Considerable variations were observed, both of the boundary-layer width and the free-stream velocity at the edge of the boundary layer. An attempt was made by using the pontoon results, and also by using Ludwieg and Tillmann’s formula, to find C f ′ at each of the positions, but the disagreement between the two methods throws some doubt on the validity of their use in 3-dimensional flow. Show more
DOI: 10.3233/ISP-1958-55101
Citation: International Shipbuilding Progress, vol. 5, no. 51, pp. 493-499, 1958
Authors: Towle, E.L.N.
Article Type: Research Article
Abstract: A review of various forms of electric ship propulsion, comparing the a.c. and d.c. transmission systems at present in use, and indicating the types of vessel in which each is most effective.
DOI: 10.3233/ISP-1958-55102
Citation: International Shipbuilding Progress, vol. 5, no. 51, pp. 500-514, 1958
Authors: Cockcroft, John
Article Type: Research Article
Abstract: The lecture reviews the present state of development of nuclear propulsion for shipping in the light of the technical performance of the U.S. nuclear submarines and the information disclosed at the Geneva Conference on the development of commercial nuclear propulsion. Five types of nuclear reactor for propulsion purposes have so far been considered: the pressurized-water reactor, the boiling-water reactor, the sodium-cooled reactor, the gas-cooled graphite-moderated reactor and the organic-liquid-moderated reactor. The pressurized-water reactor has been adopted for nearly all U.S. Naval units and by the U.S.S.R. for their icebreaker, but capital costs are high. On present information the …boiling-water reactor seems likely to have appreciably lower capital costs than the pressurized-water reactor, and with substantial development it seems not impossible that capital costs of this system might approach those of the conventional propulsion systems. Fuel costs for nuclear propulsion systems depend on the cost of enriched fuel and on the cost of fabrication of fuel elements, which are at present very high. To achieve fuel costs equal to oil-fuel costs would require the use of low cost enrichment. Under these conditions and if capital charges can be brought into approximate parity, nuclear propulsion would have a chance of being competitive. This time seems, however, to be some distance away. Nevertheless it may be desirable to gain practical experience in this field so that the future role of nuclear propulsion can properly be judged. Show more
DOI: 10.3233/ISP-1958-55103
Citation: International Shipbuilding Progress, vol. 5, no. 51, pp. 515-521, 1958
Authors: Johnson, N. Vilhelm
Article Type: Research Article
DOI: 10.3233/ISP-1958-55104
Citation: International Shipbuilding Progress, vol. 5, no. 51, pp. 522-529, 1958
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