Research On Hydraulic Characteristics Of Shipborne Supercharged Boiler

Steam power device have incom-parable Advantage .At present, it was used to lots of war - ship, especially for Large Navy Ships, and possesses very important position.The effect of marine conditions on navy ships includes inclining, transverse swaying, fore-and-aft swaying and fluctuating .In order to research conveniently, the paper makes them to mathematic formula. The stress analysis indicates that the control volume was acted by inertial force,centripetal force and shear forcebesides besides gravity force and force of friction.Its pressure - drop also includs gravitational pressure - drop,friction pressure - drop and accessional pressure - drop.The momentum equation was given,Throughing compute method,we could compute the pressure - drop of pipe.Use Visuo Basic 6.0 programming, selecting different conditions of the marine conditions for circuit of the pressure drop and flow rate analysis. The results indicate that the ship tilted, transverse swaying, fore-and-aft swaying and fluctuating have varying degrees of impact for natural cycle of the pressure drop and flow. Generally speaking, tilt and swing is not conducive to the natural cycle, and the fluctuating of the natural cycle sometimes benefited and sometimes hindered. The different biggest swing angles and cycle have same regularities, but different influence quantity for natural– circulation. When there are fluctuations in the same study also selected.At the end of the paper all selected conditions above are checked for heat transfer deterioration, the calculating result indicates that it is basically not happen.