| The small spherical submersible due to the symmetrical shape, have the same resistancein all directions, using a conventional propeller or ducted propeller propulsion system isdiiffcult to meet the needs of small spherical submersible running problems, put forwardusing the propiision system for small spherical submarine propulsion, water-jet jet propulsionsystem installed in the submersible internal, consisting of water-jet propulsion system consistsof four water-jet propulsion system, jet propulsion rear system four nozzle design in divingapparatus, consisting of a face, by changing the nozzle jet lfow, the deformation caused bypromoting, small spherical submersible maneuvering motion. This design method couldcontrol the water-jet pimp noise，basically does not produce the appendage resistance andpropulsion devices increase. By spraying wateron the new propulsion system to promote theresearch way, solve the technical problemsof today’s manipulation of small sphericalsubmersibles.The present domestic and foreign researchon applied to large and medium-sized marinewater-jet propulsion system conducted in-depth research, for the purpose of this paper isapplied to a small spherical submersible small size water-jet propulsion system promote thesubmersible propulsion system way, entrance for small spherical submersible impact, multiplejet propulsion nozzle jet lfow coupled to each other small spherical submersibles and theeffects of water-jet propulsion system driving a small spherical vehicle operating parametersresearch very little involves the. This article in view of the above problems, combined with asmall spherical submersible characteristics were studied, the main research work is asfollows:1. Refer to the analysis of the domestic and foreign submairne, spherical submersiblesand water-jet propulsion system on the basis of research results, analysis of spherical shapeand small submersible underwater running resistance characteristics, pointed out that the useof a water-jet propulsion unit formed the advance mode and two water-jet propulsion deviceline propulsion mode is dififcult to achieve a small spherical submersible motor needs，designthe use of water-jet propulsion system to advance the way small spherical submersiblescheme, scheme for small spherical submersible internal water, through a uniifed entrancewith external lfuid exchange lfow，ofur water-jet propulsion device is arranged in the smallspherical submersible interior through the catheter is connected to the casing nozzle ejectorwater, promote the formation of surface, through the promotion of surface deformation pushing small spherical submersible motor.2.Water-jet propulsion system entrance velocity distribution non-uniformity phenomenaand entrance velocity ratio IVR correlation, put forward water-jet propulsion system can usethe uniifed entrance to reduce IVR eliminate entrance velocity distribution non-uniformityphenomena on a small spherical submersible effects, combined with a small spherical divingdevice characteristic, applied FLUENT software to analyze the water-jet propulsion theimiifed entrance imder different IVR conditions, on a small spherical submersible speed, geton IVRdS can solve the water-jet propulsion system imiifed entrance velocity distirbutionimevenness phenomenon, the use of numerical data proved that the optimization method isfeasible, and the design of water-jet propulsion system after optimization of the uniifedentrance area numerical computation is carired out, raised in a small spherical submersiblereached a maximum speed of lm/s, a small spherical submersible imiifed entrance area atleast should be designed as50cm2.3.Design of water-jet propulsion system is composed of four water-jet propulsion unitadvance advance small spherical submersible motor, through the water-jet propulsion systemout of the jet lfow nozzle theoretical analysis, combined with the small spherical submersiblenozzle design characteristic, put forward water-jet propulsion system of the two adjacentnozzle circle and sphere the angle0=2°.480to maximize the probability that the water-jetpropulsion system for small spherical diving device that can provide acceleration needed ofrmaximum eiffciency of thrust, and can provide attitude adjustment of the maximum torque,reducing the injection water lfow on the impact of small spherical submersible optimizationmethod, and the numerical analysis method of simulation simulation results show that theoptimized scheme，with water-jet propulsion system vent design requirements.4.Water-jet propulsion system design in small spherical submersible rear, composed offour water-jet propulsion imit nozzle jet composed of a pushing surface pushing smallspherical submersible motor, with the method of numerical analysis advance advance smallspherical submersible mode are analyzed in detail, with domestic and foreign research typicalsubmarine, a small spherical submersible water-jet propulsion system manipulationperformance can be achieved using four propeller and rudder torpedo shaped submersibleeffect.5.In order to meet the needs of design task, a small spherical submersible0.3m diameter.Submersible internal space is limited, installed in the small submarine on the four water-jetpropulsion unit for small size propulsion pimp, already formed large water-jet propulsionsystem operation situation results do not apply to this small propulsion system. This article through the wall surface integral numerical analysis method, combining with the test to get adetailed miniature spherical submersible propulsion system operation status data, on water-jetpropulsion system generated perpendicular to the direction of the mechanical components ofthe thrust and nozzle pressure were analyzed, the paper design of water-jet propulsion systemIVR^0.5can ignore this effect, on the water-jet propulsion system of small sphericalsubmarine space motion was studied by numerical analysis, analysis results show that thewater-jet propulsion of small spherical diving device can achieve space motion, basically toachieve the minimum turning radius of gyration,0.018m. |
PDF Full Text Request