水滴撞击受热表面的声发射

IF 1 4区工程技术 Q4 ENGINEERING, CHEMICAL

Atomization and Sprays Pub Date : 2024-06-01 DOI:10.1615/atomizspr.2024051683

Volfango Bertola

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引用次数: 0

摘要

实验研究了水滴撞击受热表面所产生的声音，目的是确定各种撞击形态所特有的声音特征。虽然对水滴撞击液体表面的声音进行了广泛研究，但对水滴撞击固体加热表面的声音却很少关注。识别不同撞击形态所特有的声音特征，可以在不需要高速成像视觉检测的情况下识别撞击状态，并可用于训练自动撞击状态检测的机器学习算法。水滴由悬挂在抛光铝表面上方的皮下注射针头产生，温度在 100°C 至 400°C 之间，撞击韦伯数在 30 至 150 之间。冲击时产生的声音由超心形电容式麦克风捕获，并与冲击的高速视频记录进行比较。结果表明，不同的撞击形态产生的声音具有不同的频谱特征。

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Acoustic emission of water drops impacting on a heated surface

The sound generated by the impact of water drops on heated surfaces is studied experimentally, with the purpose to identify the sound features characteristic of the various impact morphologies. Whilst the sound of drops impacting on liquid surfaces has been investigated extensively, little attention was given to the sound of drops on solid, heated surfaces. The identification of sound features specific to different impact morphologies would enable the impact regime recognition without the need of high-speed imaging visual inspection, and can be used to train machine learning algorithms for automatic impact regime detection. Water drops were generated from a hypodermic needle suspended above a polished aluminium surface at temperatures between 100°C and 400°C, with impact Weber numbers ranging from 30 to 150. The sound generated upon impact was captured by a supercardioid condenser microphone, and compared with high-speed video recordings of the the impact. Results suggest different impact morphologies generate a sound with distinctive spectral features.

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来源期刊

Atomization and Sprays 工程技术-材料科学：综合

CiteScore

2.10

自引率

16.70%

发文量

审稿时长

1.7 months

期刊介绍： The application and utilization of sprays is not new, and in modern society, it is extensive enough that almost every industry and household uses some form of sprays. What is new is an increasing scientific interest in atomization - the need to understand the physical structure of liquids under conditions of higher shear rates and interaction with gaseous flow. This need is being met with the publication of Atomization and Sprays, an authoritative, international journal presenting high quality research, applications, and review papers.