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Experimental and numerical combined method for high pressure pulsating bubble motion and load in water

A medium-high pressure and bubble technology, which is applied in the field of experimental and numerical combination of high-pressure pulsating bubble motion and load in water, can solve the problems of lack of setting method for initial parameters of bubbles and less development, and achieves important engineering application value and academic significance. Effects of research methods and techniques

Active Publication Date: 2018-11-20
HARBIN ENG UNIV
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Problems solved by technology

However, at present, the joint research of boundary element method and high-pressure pulsating bubble experiment is seldom carried out, and there is still a lack of method for setting the initial parameters of the bubble in numerical calculation.

Method used

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  • Experimental and numerical combined method for high pressure pulsating bubble motion and load in water
  • Experimental and numerical combined method for high pressure pulsating bubble motion and load in water
  • Experimental and numerical combined method for high pressure pulsating bubble motion and load in water

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Embodiment Construction

[0050] The present invention will be described in more detail below in conjunction with accompanying drawing:

[0051] Method flow chart as Figure 5 shown.

[0052] 1. As attached figure 1 Shown is a free-field high-voltage pulsating bubble experimental system, in which the main components are: adjustable voltage high-voltage pulsating bubble generator 1, electrode 2, first copper wire 3, second copper wire 4, water tank 5, light source 6, High-speed cameras7. Charge the high-voltage pulsating bubble generating device until it reaches a predetermined voltage (200-2000V). The experiment was carried out in a cubic water tank of 500×500×500mm, and the water depth was controlled above 450mm. First, a free-field high-pressure pulsating bubble experiment was carried out, and the copper wire lap point was set in the center of the water tank, at half the water depth, to minimize the boundary effect. A high-speed camera is used to record the bubble movement process, and the numbe...

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Abstract

The invention discloses an experimental and numerical combined method for high pressure pulsating bubble movement and load in water. The method comprises the following steps of: (1), using the Rayleigh-Plesset spherical bubble theory to calibrate the free-field high-pressure pulsating bubble experiment method, and determining a bubble initial condition; (2), using the calibrated bubble experimentmethod to carry out bubble dynamics experiments under different boundary conditions; (3), using a boundary element method to calculate dynamic characteristics of aspherical bubbles on the basis of theobtained experimental result; (4), adopting an auxiliary function method to calculate the velocity field and the pressure field around the bubbles; and (5), performing post-processing on the calculation result. The invention is suitable for studying the motion and load characteristics of the bubbles near a structure and a free surface in the gravity field, has the calculation accuracy and efficiency meeting the engineering needs, and has wide application prospect in the fields of underwater explosion, cavitation, medicine, cleaning, the chemical industry and the like.

Description

technical field [0001] The invention belongs to the field of bubble dynamics in fluid mechanics, and in particular relates to an experimental and numerical combined method of high-pressure pulsating bubble movement and load in water under laboratory conditions. Background technique [0002] As we all know, underwater explosions seriously threaten the vitality of ships. The underwater explosion process can be divided into two relatively independent stages: shock waves and bubbles. Both shock waves and bubble loads will cause different types and degrees of damage to the structure. For more than a century, people have conducted detailed and in-depth research on the characteristics and laws of structural damage caused by shock waves, but the research on underwater explosion bubbles is relatively insufficient. Directly conducting underwater explosion experiments is the most direct method to study underwater explosion bubbles. However, due to the difficulty, high cost, and certain...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06F17/11
CPCG06F17/11G06F30/20
Inventor 李帅张阿漫韩蕊王诗平曹卓尔刘云龙崔璞明付仁曹雪雁
Owner HARBIN ENG UNIV
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