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发表于 2010-7-1 16:19
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来自: 中国香港
本帖最后由 menglianglum 于 2010-7-1 16:22 编辑
Please be informed that nowadays most of the high speed passenger ca**arans are using waterjet propulsion. Before mid 1980s,people in Chinese shipping circle normally rejected waterjet propulsion. I think it was attributed to the textbook used in old days mentioned the propulsion efficiency of waterject was less than that of propeller.
Waterjet propulsion is preferred over propeller propulsion because
Produces less noise and vibration.
Ability to accelerate, reverse, stop and steer is excellent.
Higher efficiency.
Higher speed with lower fuel consumption.
No overloading of engine, lesser breakdowns and increased life cycle.
Waterjet Propulsion
Main components are: pump and nozzle.
Pump is generally driven by a shaft from a diesel engine or gas turbine, to draw water through a sloping intake duct under the vessel’s hull.
High pressure water from the pump is discharged through an aft-facing nozzle to move the vessel forward. |
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