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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: van Lammeren, W.P.A. | Wahab, R.
Article Type: Research Article
Abstract: The research reported in this paper has been carried out to investigate the effect of large bulbous bows on the resistance and propulsion of a ship. The basic shape of the investigated bulbs was a sphere, connected to the ship in such a way that the original hull form was maintained as much as possible. The basic ship was a fast cargo liner of 150 m (500 ft) length. Her trial speed corresponds to about V s / L f = 0.90 . The application of a bulb of …conventional size and shape would not favourably affect the resistance in the speed range of interest. The application of a bulb based on a big sphere, however, did reduce the required power at equal speeds. For the ship under consideration this reduction was 8.9 per cent. at V s / L f = 0.90 . The size of the sphere, needed to reduce the bow wave system as much as possible, was determined by a simple approximative theory. The experiments concerned in the first instance the location of the sphere relative to the bow, the effect of a variation of the diameter of the sphere and of the angle of entrance of the water lines of the ship. When the ship was fitted with a large bulb faired into a more conventional shape, the resistance curve of the ship obtained the character of that of a ship one or two knots faster than the basic ship. Finally the effect of a bulbous bow was compared with the effect of small changes in the main dimensions of the ship. Show more
DOI: 10.3233/ISP-1966-1314201
Citation: International Shipbuilding Progress, vol. 13, no. 142, pp. 163-180, 1966
Authors: Wahab, R.
Article Type: Research Article
Abstract: The research reported in this paper has been carried out to investigate the effect of a large bulbous bow on the behaviour of a 500 ft fast cargo liner in a seaway. The basic shape of the investigated bulb was a sphere with a radius of 2 per cent. of the ship’s length. The centre of the sphere was located on the fore perpendicular, and the lowest point on the base-line. The ship and the sphere were connected in such a way that the original hull form was maintained as much as possible. A model of this ship was tested …in regular and long-crested irregular head seas. The effects of the bulbous bow on pitch and heave motions, relative bow motion, resistance increase, vertical bending moments, shipping of green seas and occurrence of slamming were investigated. Show more
DOI: 10.3233/ISP-1966-1314202
Citation: International Shipbuilding Progress, vol. 13, no. 142, pp. 181-193, 1966
Authors: Wolf, G.
Article Type: Research Article
Keywords: Engine data, prototypes and trials, combustion of heavy fuel oil, design of the V-engine, the short and long-stroke inline engines
DOI: 10.3233/ISP-1966-1314203
Citation: International Shipbuilding Progress, vol. 13, no. 142, pp. 194-204, 1966
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