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Study on the Cooling Performance of a Focused Ultrasonic Radiator for Electrical Heating Elements
Songfei Su1, Yang Wang1, Lukai Zheng1
1School of Mechanical Engineering, Nanjing Institute of Technology, Nanjing 211167, China.
Micromachines
|January 23, 2024
Summary
Focused ultrasound effectively cools electrical heating elements via acoustic streaming. This novel radiator offers faster, more targeted cooling than fans, ideal for specialized environments.
Area of Science:
- Mechanical Engineering
- Acoustics
- Heat Transfer
Background:
- Electrical heating elements require efficient cooling solutions.
- Traditional cooling methods like fans may lack precision or speed.
Purpose of the Study:
- To propose and investigate a focused ultrasonic radiator for cooling electrical heating elements.
- To analyze the working characteristics and effectiveness of ultrasonic cooling.
Main Methods:
- Finite Element Method (FEM) computational analysis.
- Flow field visualization tests.
- Experimental temperature measurements of heating elements.
Main Results:
- Focused ultrasound induces forced convective heat transfer through acoustic streaming.
- Surface temperature of a 5 mm heating element dropped from 100°C to ~55°C at 30Vp-p.
- Cooling effect remained similar for heating elements up to 30 mm in diameter.
- Ultrasonic radiator demonstrated shorter cooling time and more concentrated cooling area compared to a fan.
Conclusions:
- Focused ultrasonic radiators provide effective and targeted cooling for electrical heating elements.
- This technology is suitable for applications in specialized environments requiring precise thermal management.
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