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A Method for Determining the Cavitation Threshold of Liquid Metals

A technology of liquid metal and cavitation threshold, which is applied in design optimization/simulation, color TV parts, TV system parts, etc., can solve problems such as the inability to determine the liquid metal cavitation threshold, and achieve low cost and simulation process Simple, Adaptable Effects

Active Publication Date: 2022-05-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention solves the technical problem that the cavitation threshold of liquid metal cannot be determined at present, and provides a method for determining the cavitation threshold of liquid metal

Method used

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  • A Method for Determining the Cavitation Threshold of Liquid Metals
  • A Method for Determining the Cavitation Threshold of Liquid Metals
  • A Method for Determining the Cavitation Threshold of Liquid Metals

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specific Embodiment approach 1

[0033] Embodiment 1: In this embodiment, a method for determining the cavitation threshold of liquid metal is carried out according to the following steps:

[0034] 1. Place the liquid metal droplets to be tested that are liquid at room temperature on the transparent glass of the device for determining the cavitation threshold of liquid metal;

[0035] Or place the non-liquid metal at room temperature on the transparent glass of the liquid metal cavitation threshold device, and then heat the metal to a liquid state, which is the liquid metal to be tested;

[0036] 2. Turn on the ultrasound, and use a high-speed camera to shoot the spreading process of the liquid metal droplets to be measured;

[0037] 3. Select the photo taken in step 2, and record the width of the droplet front without acoustic cavitation in the photo and the shooting time;

[0038] 4. Use finite element software to simulate the spreading process of the liquid metal to be tested;

[0039] 5. Corresponding t...

specific Embodiment approach 2

[0040] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the device for determining the liquid metal cavitation threshold includes an ultrasonic tool head 1, a base material 2, a transparent glass 3 and a high-speed camera 4, wherein the transparent glass 3 is replaced Part of the base material 2, and the transparent glass 3 is closely attached to the base material 2, the ultrasonic tool head 1 is closely attached to the upper surface of the base material 2, the liquid metal 5 to be tested is placed on the transparent glass 3, and the high-speed camera 4 is located on the transparent glass. Below 3, the lens of the high-speed camera 4 is set directly below the liquid metal 5 to be tested, and faces the liquid metal 5 to be tested. Others are the same as the first embodiment.

specific Embodiment approach 3

[0041] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the base material is pure aluminum. Others are the same as in the first or second embodiment.

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Abstract

A method for determining the cavitation threshold of liquid metal, the invention relates to the field of acoustic cavitation of liquid metal. The invention aims to solve the technical problem that the liquid metal cavitation threshold cannot be determined at present. Method: Use high-speed photography to photograph the cavitation characteristics of the base metal / liquid metal interface during the ultrasonic-assisted spreading of liquid metal. After cavitation photography, the region where cavitation cannot occur at the front of the droplet spreading can be measured. Through finite element simulation Methods The droplet spreading process is simulated, and the sound pressure at the edge of the region where cavitation cannot occur is extracted, that is, the cavitation threshold. The method has the advantages of simple operation, low cost and accurate result; it is not limited by liquid metal components and has a wide application range. The invention is used to determine the cavitation threshold of liquid metal.

Description

technical field [0001] The invention relates to the field of acoustic cavitation of liquid metals. Background technique [0002] The acoustic cavitation phenomenon of liquid has a very wide range of applications in ultrasonic cleaning, ultrasonic extraction, ultrasonic catalysis, ultrasonic lithotripsy and ultrasonic melt treatment. Melt structure, improve ultrasonic welding efficiency, etc. Acoustic cavitation refers to a series of processes of nucleation, growth, oscillation and final collapse of tiny bubbles inside the liquid under the action of ultrasonic waves. The collapse of cavitation bubbles will produce a series of local, extreme and instantaneous phenomena, such as high temperature of thousands of degrees, pressure of hundreds of MPa, and liquid velocity of hundreds of meters per second. The industrial applications of ultrasonic cavitation mostly rely on this series of extreme physical phenomena formed during the collapse of cavitation bubbles. [0003] The cav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23H04N5/232G06F113/08
CPCG06F30/23G06F2113/08H04N23/80
Inventor 李政玮许志武闫久春
Owner HARBIN INST OF TECH
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