High specific speed propulsive water-jet pump hydraulic model structure
A technology of water jet propulsion and high specific speed, which is used in ship propulsion, propulsion parts, ship parts, etc.
Pending Publication Date: 2019-07-26
DALIAN UNIV OF TECH
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Problems solved by technology
[0004] Different from the structure of water jet propulsion pump with low cavitation specific speed, the avoidance of cavitation and vortex distortion is the biggest challenge in the design of high specific speed water jet propulsion pump
Moreover, in the structural design of the water jet propulsion pump, for given design parameters, how to implement the research and development of the water jet propulsion pump structure under the condition of multiple constraints is still facing a huge challenge
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[0018] figure 1 , 2 A structural schematic diagram of a hydraulic model structure of a high specific speed water jet propulsion pump is shown. In the figure: the hydraulic model structure of this high specific speed water jet propulsion pump includes diversion cone type water diversion body 1, inducer type impeller 7 (the impeller is a closed structure in the figure) and axial flow type guide wheel 5 . The flow channel of the water inlet guiding body 1 is provided with six guide cones 2 uniformly distributed in the circumferential direction of the central axis 9, and the flow channel of the impeller 7 is provided with two impeller blades 3 uniformly distributed in the circumferential direction of the central axis 9, Five guide vanes 4 are evenly distributed in the circumferential direction of the central axis 9 in the flow channel of the guide wheel 5 . The flow channel of the water inlet guiding body 1, the flow channel of the impeller 7 and the flow channel of the guide w...
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The invention relates to a high specific speed propulsive water-jet pump hydraulic model structure, and belongs to the technical field of vane pumps. The propulsive water-jet pump hydraulic model structure comprises a water inlet flow guiding body, an impeller and a guide wheel, a flow guiding cone is arranged in the flow channel of the water inlet flow guiding body, blades are arranged in the flow channels of the impeller and the guide wheel, the flow channel of the water inlet flow guiding body, the flow channel of the impeller and the flow channel of the guide wheel sequentially communicate, and the water inlet flow guiding body, the impeller and the guide wheel have great suitability. Under the limit of specific structure form and size, the high specific speed propulsive water-jet pumphydraulic model structure has hydraulic performance of high efficiency, high specific speed and high thrust. The kinetic-static interference effect can be effectively reduced, and distortion flow fields such as vortex and cavitation are avoided; an arc structure is adopted to treat the front edge of a flow guide cone in the water inlet flow guiding body, efficient drainage can be achieved, localvortex flow can be weakened, and trailing edge flow separation can be avoided through sharp point processing of the flow guiding cone; and the front edges of the blades of the impeller protrude towards, cloudy cavitating flow at the front edges of the blades are advantageously separated, and local flow is improved.
Description
technical field [0001] The invention relates to a hydraulic model structure of a high specific speed water spray propulsion pump, which belongs to the technical field of vane pumps. Background technique [0002] The water-jet propulsion pump is a novel propulsion method for the underwater aircraft body, which uses the reaction force of the jetted water flow from the propulsion pump to push the aircraft body forward. With the increasing demands of high-end aircraft for high-speed, high-thrust water-jet propulsion pumps, in order to break through foreign product monopoly and technology blockade, it is very necessary to carry out effective hydraulic design and development of high-speed, high-thrust water-jet propulsion pumps of. [0003] Generally, the performance of the water jet propulsion pump is comprehensively measured by the dimensionless cavitation ratio speed, that is, the higher the speed and the greater the thrust, the greater the cavitation ratio speed of the water ...
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IPC IPC(8): B63H11/08
CPCB63H11/08B63H2011/081
Inventor 王晓放鲁业明周方明张野于茜赵伟吴小翠李忠贺
Owner DALIAN UNIV OF TECH