Analysis method of high-speed compressible supercavity flow characteristics

Abstract

The invention discloses an analysis method of high-speed compressible supercavity flow characteristics and belongs to the field of fluid mechanical engineering. The analysis method comprises the stepsas follows: step 1, establishing a geometric model; step 2, performing mesh division on the geometric model established in step 1 and a fluid computational domain; step 3, setting boundary conditionsand a computing method; step 4, performing secondary development through CFD software to realize compressible correction of physical attributes of water; step 5, conducting numerical computation analysis on the high-speed compressible supercavity flow characteristics; step 6, performing numerical simulation analysis and comparing a numerical simulation result with an experiment result to verify accuracy and feasibility of the analysis method. The high-speed compressible supercavity flow law and mechanism can be revealed, so that a theoretical foundation is laid for structural design of underwater high-speed navigation bodies, and the actual application engineering problems of the high-speed navigation bodies can be solved.

Description

technical field [0001] The invention belongs to the field of fluid mechanical engineering, and relates to a high-speed compressible supercavitation flow characteristic analysis method, in particular to a high-speed compressible supercavitation flow characteristic analysis method based on secondary development of CFD software. Background technique [0002] Cavitation refers to a phase change phenomenon that occurs in a liquid medium under certain conditions. When the partial pressure in the water is reduced to the saturated vapor pressure of water, part of the water will turn into water vapor, thus forming a steam cavity in the water flow, that is, cavitation occurs. Depending on the flow conditions, the shape of cavitation bubbles is also very different. Mainly divided into: primary cavitation, partial cavitation and supercavitation. When the cavitation area develops to cover the entire surface of the object and extends behind the object, even the size of the cavity can fa...

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Problems solved by technology

At present, there are no relatively accurate analysis methods and numerical calculation methods for these problems. It is necessary to study a numerical calculation method that can accurately simulate the flow characteristics of high-speed compressible supercavitation, and apply it to subsonic, transonic and supersonic Under the working conditions such as the speed of sound, to reveal the flow law and mechanism of high-speed compressible supercavitation, so as to provide a theoretical basis for the structural design of underwater high-speed vehicles

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