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The journal International Shipbuilding Progress (ISP) was founded in 1954. Each year four issues appear (in April, July, September and December). 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: Oosterveld, M.W.C.
Article Type: Research Article
Abstract: For the application behind ships two different types of ducted propellers are considered; the ducted propeller where the nozzle accelerates the flow at the propeller and the ducted propeller where the nozzle decelerates the flow at the propeller. The first type of ducted propeller is now extensively used in cases where the ship screw is heavily loaded or where the screw is restricted in diameter. The accelerating nozzle offers a means to increase the efficiency of heavily loaded propellers. The second type of ducted propeller is used to increase the static pressure at the impeller. This nozzle may be used …if retardation of propeller cavitation is desired. This paper deals with the first type of nozzle. The open-water test results of ducted propeller systems suitable for application on pushboats and tugs are given. In addition the results with a nozzle specially suited for astern operation is supplied. The effect of the appendages (rudders, struts etc.) on the characteristics of ducted propeller configurations suitable for pushboats and single-screw tugs has been studied. The optimum value of the flanking rudder angle ⊝ has been determined. Finally, the results of open-water tests with ringpropellers, ringpropellers in nozzles and a multiple nozzle-ringpropeller system is discussed. Show more
Citation: International Shipbuilding Progress, vol. 19, no. 219, pp. 351-371, 1972
Authors: Vaussy, P.
Article Type: Research Article
Citation: International Shipbuilding Progress, vol. 19, no. 219, pp. 372-384, 1972
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