A Method for Analyzing the Characteristics of Water-entry Cavitation of Aircraft Body

A technology of water cavitation and analysis method, which is applied in the field of fluid mechanical engineering and can solve problems such as short design cycle
CN109374254BInactive Publication Date: 2020-01-17BEIJING INSTITUTE OF TECHNOLOGYGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING INSTITUTE OF TECHNOLOGYGY
Publication Date
2020-01-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for analyzing the water-entry cavity characteristic of a navigation body and belongs to the field of fluid mechanical engineering. The method comprises a step of performing meshing and boundary condition setting on a whole drainage basin formed by water and air domains and applying a boundary data immersion method and a volume fraction method to an N-S equation, astep of realizing the simulation of an immersed object in multi-phase flow by introducing the boundary data immersion method, a step of realizing the tracking of a fluid interface by introducing the volume fraction method, and a step of solving the speed and pressure of the drainage basin by using a two-step projection method. According to the invention, the cavity flow numerical simulation of thewater-entry navigation body can be achieved to reveal the water-entry cavity flow law and mechanism of the navigation body, therefore, a theoretical basis is provided for the structural design of thewater-entry navigation body, the practical application engineering problem of the water-entry navigation body can be solved, and the method has the advantages of high design efficiency, short designperiod and the facilitation of practical application.
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Description

technical field

[0001] The invention belongs to the field of fluid mechanical engineering, and relates to an analysis method of water-entry cavitation characteristics of a navigation body, which is an analysis method of water-entry cavitation characteristics of a navigation body based on self-programming. Background technique

[0002] The water entry problem of a vehicle involves the interaction of solid, liquid, and gas phases. The water entry process covers many physical problems such as cross-media, multiphase flow, strong turbulence, and compressibility. The problem of water entry of flying objects is a common natural phenomenon, so it has important applications in many engineering fields and scientific research, such as: water recovery of spacecraft, throwing of lifeboats, walking of aquatic animals, water diving by divers, etc. Early studies on the water entry problem mainly focused on the geometric parameters of the vehicle, the angle of entry into the water, and the ...

Claims

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