Clapboard optimization method for inhibiting compressible two-phase flow oscillation

Abstract

The invention provides a clapboard optimization method for inhibiting compressible two-phase flow oscillation. The method comprises the following steps: solving a compressible Navier Stokes equation set based on a finite volume method and in combination with a fluid volume method to obtain a flow velocity of compressible two-phase flow oscillation and a resultant force applied to a side wall of a liquid bin after an anti-oscillation clapboard is added in the liquid bin; performing optimal control on the water permeability of the anti-oscillation clapboard based on a topological optimization method and in combination with a compressible two-phase flow movement algorithm with a free liquid level by using the resultant force as a target function and using the water permeability of the anti-oscillation clapboard as an optimal variable, wherein the water permeability is a ratio of an upper hollowed area of the anti-oscillation clapboard to the total area of the anti-oscillation clapboard; and determining the shape of the anti-oscillation clapboard according to the optimal water permeability. By adoption of the clapboard optimization method provided by the invention, the optimal design of the shape of the clapboard for inhibiting the movement of the compressible fluid in the liquid bin is realized while considering the strenuous movement of the compressible two-phase flow with the free liquid level.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of compressible fluid sloshing prevention, and in particular to a partition optimization method for suppressing compressible two-phase flow sloshing. Background technique [0002] In the marine and aerospace fields, liquid cargo and liquid fuel storage tanks are one of the important components of the delivery equipment, such as the liquefied natural gas storage tank (LNG) of the offshore floating liquid natural gas mining terminal (FLNG), the Fuel liquid hydrogen storage tank, etc. Their common feature is that the attitude of the ship or aircraft is constantly changing during the movement, and the liquid carrying rate of the fluid in the liquid storage tank is in an unsaturated state, so the compressible fluid with a free liquid surface in the liquid storage tank is under the action of external excitation. Vigorous motions will occur such that the compressible fluid impacts the tank st...

AI Technical Summary

Problems solved by technology

[0003] At present, the sloshing diaphragm is one of the limited methods used to study sloshing suppression, but the research on the shape design of the sloshing diaphragm is relatively scarce, and the shapes of the hollowed out areas on the board are all regular shapes

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