Numerical forecasting method for cavitation noise of composite propeller

A composite material, numerical prediction technology, applied in electrical digital data processing, design optimization/simulation, instruments, etc., can solve the problems of high cavitation noise and serious propeller cavitation, so as to improve work efficiency, reduce time and cost , the effect of low cost

Pending Publication Date: 2021-07-20
HARBIN INST OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The purpose of this invention is to propose a numerical prediction method for the cavitation noise of a composite material propeller, so as to solve the problems of serious cavitation phenomenon and large cavitation noise of the existing propeller

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  • Numerical forecasting method for cavitation noise of composite propeller
  • Numerical forecasting method for cavitation noise of composite propeller

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Embodiment Construction

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0020] The present invention provides an embodiment of a numerical prediction method of composite material propeller cavitation noise, and the numerical prediction method comprises the following steps:

[0021] Step one one, according to the design dimension of propeller, utilize three-dimensional configuration software to construct the geometric model of propeller;

[0022] Step 12. Based on the geometric model, the computational fluid dynamics pr...

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Abstract

The invention provides a numerical forecasting method for cavitation noise of a composite propeller, and the method comprises the following steps: building a geometric model of the propeller through three-dimensional configuration software according to the design size of the propeller; completing the construction of a hydrodynamic model; establishing a finite element model of the composite propeller by utilizing finite element software; carrying out cavitation performance simulation calculation on the composite material propeller to obtain a cavitation numerical simulation result, and obtaining the difference between the hydrodynamic performance and the cavitation performance of the composite material propeller and the metal material propeller; storing a cavitation numerical simulation result obtained in the fluid analysis software; constructing an acoustic calculation model of the composite propeller, and setting a plurality of monitoring points in the acoustic calculation model; and comparing and analyzing attenuation change rules of the cavitation radiation noise at different positions. According to the method, the vibration noise radiation condition of the propeller can be well predicted, and reference is provided for low-noise propeller design.

Description

technical field [0001] The invention relates to a numerical prediction method of composite material propeller cavitation noise, and belongs to the technical field of composite material propeller noise. Background technique [0002] As the development of ships tends to be larger and faster, the load on the propeller blades continues to increase, and cavitation is becoming more and more inevitable. When cavitation occurs on the surface of the propeller, the pressure on the surface of the blade is about the steam pressure in the region where the cavitation occurs, which will inevitably destroy the original hydrodynamic rules of the blade in full wet flow, affect the hydrodynamic performance of the propeller, and reduce the The propulsion efficiency of the propeller; at the same time, when the cavitation collapses, the blade and the two-phase flow have a strong interaction in the cavitation area, which will cause serious erosion of the surface material of the blade; more importa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/15G06F30/28G06F113/08G06F119/14
CPCY02T90/00
Inventor 洪毅张宏磊贺博刘文博王荣国赫晓东
Owner HARBIN INST OF TECH
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