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Thermal Stress Analysis and Control Method for Surface Acoustic Wave Atomizer.

Xufeng Xue^1,2, Baile Cui^2,3, Xianping Chen^1,2

¹College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China.

Sensors (Basel, Switzerland)

|November 14, 2023

Summary

This summary is machine-generated.

This study addresses thermal stress in surface acoustic wave (SAW) atomizers. A power control method effectively reduces thermal stress, preventing atomizer failure.

Keywords:

atomization surface acoustic wave thermal stress

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Area of Science:

Materials Science
Mechanical Engineering
Acoustics

Background:

Surface acoustic wave (SAW) atomizers face potential failure due to thermal stress concentration during operation.
Understanding the thermal elevation process is crucial for preventing device malfunction.

Purpose of the Study:

To investigate the thermal elevation process in SAW atomizers.
To propose and validate a temperature regulation method to mitigate thermal stresses.
To prevent potential failure of SAW atomizers caused by thermal stresses.

Main Methods:

Collected temperature rise data for SAW atomizers using water, olive oil, and glycerol at varying power levels (5/6/7 W).
Obtained surface temperature curves and simulated stress changes under different operating conditions.
Analyzed maximum stress occurrence times and developed control strategies based on experimental data.

Main Results:

SAW atomizers exhibit rapid heating during the initial working stage, regardless of the medium.
Stress levels vary across different media, but initial heating is a consistent issue.
Controlling driving power within 4 seconds of atomization start effectively avoids excessive stress during heating.

Conclusions:

A proposed power control method, limiting driving power to 3 W for the first 2 seconds, effectively reduces thermal stress.
This method prevents thermal stress-induced cracking and enhances the reliability of SAW atomizers.
The findings offer a practical solution for improving the operational lifespan of SAW atomizers.