| Issue |
E3S Web Conf.
Volume 483, 2024
The 3rd International Seminar of Science and Technology (ISST 2023)
|
|
|---|---|---|
| Article Number | 03020 | |
| Number of page(s) | 15 | |
| Section | Trends in Mathematics and Computer Science for Sustainable Living | |
| DOI | https://doi.org/10.1051/e3sconf/202448303020 | |
| Published online | 31 January 2024 | |
Visual and Pressure Signal Investigations on Bubble Produced by Ejector Bubble Generator
1 Politeknik Negeri Banyuwangi, Mechanical Engineering Department, 68461 Banyuwangi, East Java, Indonesia
2 Politeknik Negeri Banyuwangi, Agriculture Department, 68461 Banyuwangi, East Java, Indonesia
* Corresponding author: ignb.catrawedarma@poliwangi.ac.id
This study aims to investigate the pattern of bubble flow coming out of the ejector bubble generator (EBG). The flow pattern was captured using a high-speed camera. The pressure signal on the bubble generator outlet was also recorded using a differential pressure transducer, which was then processed to obtain a probability density function (PDF) and Power Spectrum Density (PSD). It indicates the flow pattern flowing at the bubble generator outlet. The results of this study occurred a time delay in the production of bubbles coming out of the EBG. The greater the air flow rate, the lower the time delay for bubble production. The bubble flow region produced by EBG was classified into the entrance, developed, and fully developed regions. In the fully developed region, large and small bubbles are separated. The greater the air flow rate, the higher the two-phase flow pressure at the EBG outlet and the PDF has one peak with a skewness value that tends to be positive (shift to the right side). The maximum value of the spectrum is at a low frequency (<100Hz) with a low magnitude as an indicator of the bubble flow pattern in the EBG outlet.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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