| Issue |
Acta Acust.
Volume 6, 2022
|
|
|---|---|---|
| Article Number | 35 | |
| Number of page(s) | 8 | |
| Section | Structural Acoustics | |
| DOI | https://doi.org/10.1051/aacus/2022027 | |
| Published online | 24 August 2022 | |
Review Article
Excitation of pipe bending modes by internal pressure: A phenomenon present in refrigerators with skin condenser
1
Acoustics and Vibration Laboratory, Department of Mechanical Engineering, Federal University of Santa Catarina, 88040-900 Florianόpolis, Brazil
2
Center of Engineering and Exact Sciences, State University of Western Paraná, 85819-110 Foz do Iguaçu, Brasil
* Corresponding author: ricardolschaefer@gmail.com
Received:
2
November
2021
Accepted:
1
July
2022
The concept of skin condenser refrigerators has been increasingly explored for its capacity to provide a larger internal cabinet volume. However, the discharge pulsation of the cooling gas has become a significant source of noise because it directly excites the cabinet. This paper analyzes the mechanisms of cabinet vibration excitation by gas pulsation in the condenser tubes. Initial tests were performed with vibration measurements on a refrigerator and on segments of the cabinet excited by pulsation only. The results showed that bending modes of cabinet segments were excited by the pulsation in the condenser tube. A theoretical analysis showed that asymmetry in the condenser tube cross section is responsible for bending moment generation and numerical evaluations confirmed this effect for different types of asymmetries.
Key words: Vibration / Noise / Refrigerator / Pulsation / Skin condenser
© The Author(s), published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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