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Method for acquiring cavitation flow field of water-jet propeller

A technology of water jet propulsion and acquisition method, applied in the direction of instruments, electrical digital data processing, computer aided design, etc., can solve the problem of inaccurate numerical prediction of water jet propulsion pump cavitation flow, etc., and achieve wide application prospects and benefits, The effect of improving prediction accuracy and high accuracy

Pending Publication Date: 2022-02-18
CHINA NORTH VEHICLE RES INST
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Problems solved by technology

[0005] In view of this, the present invention provides a method for obtaining the cavitation flow field of a water jet propulsion pump, which is used to solve the problem that the numerical prediction of the cavitation flow of the water jet propulsion pump is not accurate enough in the prior art, and can improve the cavitation of the water jet propulsion pump. Flow Numerical Prediction Accuracy

Method used

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  • Method for acquiring cavitation flow field of water-jet propeller
  • Method for acquiring cavitation flow field of water-jet propeller
  • Method for acquiring cavitation flow field of water-jet propeller

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Embodiment 1

[0104] Firstly, the 3D model of the fluid computational domain is established by 3D software, such as figure 2 As shown, it includes water area module, water inlet channel module, propulsion pump module and spout module. The diameter of the propulsion pump module is D, and the length, width and height of the water area module are 30D*10D*8D.

[0105] Then the fluid calculation domain is divided into grids, in which the water area module, water inlet channel module and spout module are divided by ICEM software, and the propulsion pump module is divided by TurboGrid software.

[0106] Then import the grid files into CFX software for combination, and set the boundary conditions. Among them, one side of the water area model is set as a velocity inlet, the other side is set as a pressure outlet, and the rest is an open boundary; the water area module, the water inlet channel module, the propulsion pump module, and the nozzle module are provided with interface surfaces, and the no...

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Abstract

The invention discloses a cavitation flow numerical value calculation method for a water-jet propeller, and belongs to the technical field of fluid mechanics numerical value calculation. The method comprises the steps of establishing a turbulence model considering a rotation effect, and performing single-phase flow calculation of the propeller; and then, establishing a cavitation model considering the rotation effect, carrying out cavitation flow numerical value calculation on the water-jet propeller by taking a single-phase flow calculation result as an initial value, and finally, obtaining the cavitation flow field information. According to the method, the influence of vapor and liquid multiphase flow compressible characteristics on a turbulence viscosity coefficient is considered, meanwhile, the influence of a strong rotation boundary on the cavitation inter-phase mass transmission is considered, the turbulence time scale is adopted to replace the relaxation time scale of phase change, the cavitation flow field simulation is associated with the flow field structure information, and then the numerical value calculation result better conforms to an actual flow field, and the prediction precision is higher.

Description

technical field [0001] The invention relates to the technical field of numerical calculation of fluid force, in particular to a method for obtaining a cavitation flow field of a water jet propeller. Background technique [0002] Due to its excellent propulsion performance, water jet propulsion is widely used in most amphibious vehicle propulsion systems. my country's Type 63 amphibious tank, Type 05 amphibious assault vehicle, American AAV7 amphibious assault vehicle, and БТР-60П amphibious armored transport vehicle all use water jet propulsion. The water jet propeller is a kind of reaction force propeller different from the propeller propeller. Its main flow components include water inlet channel, propulsion pump and nozzle. The function of the water inlet channel is to divert the water flow from the bottom of the vehicle to the inlet of the propulsion pump; the propulsion pump is the core component of the water jet propeller, including two parts, the impeller and the guid...

Claims

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Application Information

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IPC IPC(8): G06F30/28G06F113/08G06F119/14
CPCG06F30/28G06F2113/08G06F2119/14
Inventor 张孟杰冯付勇王美靖康忠杨志勇
Owner CHINA NORTH VEHICLE RES INST
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