A Numerical Prediction Method of Compressible Cavitation Flow in Propeller Based on OpenFoam Platform

Abstract

The invention discloses a method for numerical prediction of propeller compressible cavitation flow based on the OpenFOAM platform. The method first establishes a propeller model and three-dimensional calculation flow domain and divides the grid, and then establishes a control equation group consisting of compressible cavitation flow, a thermodynamic model, The compressible cavitation flow computational fluid dynamics model composed of the compressible cavitation model and the compressible turbulence model; secondly, the boundary conditions and calculation settings; then the numerical calculation of the compressible cavitation flow field; finally, the unsteady compressible flow field of the propeller is obtained Cavitation flow field characteristics, by solving the compressible cavitation flow computational fluid dynamics model to obtain the propeller flow field velocity distribution, pressure distribution, phase distribution and temperature distribution. The invention can realize accurate simulation of phenomena such as pressure pulsation, pressure pulse and shock wave induced by propeller cavitation flow, and provides a basis for establishing propeller cavitation damage prediction and control.

Description

technical field [0001] The invention relates to a numerical prediction method for compressible cavitation flow of a propeller based on an OpenFOAM platform, and belongs to the technical fields of computational fluid dynamics, cavitation and multiphase flow. Background technique [0002] Cavitation is a key scientific issue at the core of high-speed hydrodynamics, which inevitably occurs under operating conditions such as hydraulic machinery and underwater weapons, and induces complex fluid dynamics. The cavitation problem is the harshest service environment for hydraulic and ocean engineering equipment, which restricts the hydrodynamic innovation and development of hydraulic and ocean engineering equipment in my country. An in-depth understanding of cavitation flow is to further explore the mechanism of cavitation instability, predict and suppress cavitation important basis for destruction. With the development of large-scale and high-speed ships, the problem of cavitation a...

AI Technical Summary

Problems solved by technology

However, to further accurately predict propeller cavitation hydrodynamic characteristics and establish cavitation damage criteria, it is urgent to accurately simulate cavitation-induced pressure fluctuations, pressure pulses, shock waves and other phenomena, which cannot be predicted and captured by traditional incompressible calculation methods

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