https://orcid.org/0000-0002-1646-1077
![Sample our Engineering & Technology journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5933/TOC-Subject-Sample-2021-Engineering-Tech.jpg"})
Abstract
The influence of jet-to-target spacing on flow and heat transfer behaviors for swirling impinging micro-slot jets has been extensively studied. In this study, two complete revolutions of the generated helix under the slot nozzle thickness of 1.0 mm constrained the total spiraling length to 290 mm. The range of jet-to-target spacing varied from 1 to 6. The turbulent kinetic energy-epsilon model was employed to make predictions at Reynolds numbers from 5000 to 20000. The results showed that the heat transfer enhancement on the target wall depended on the pacing between the jet and the target. This is the jet flow structure exhibited a notable intensity of high-velocity vortices at the low jet-to-target spacing, whereas the jet flow impingement was abruptly reduced at the high jet-to-target spacing. The heat transfer rate also tended to increase as the Reynolds number increased. In addition, when the jet-to-target spacing was at 1, the average heat transfer value was between 32.9% and 54.2% higher than in other conditions due to high fluid acceleration.
Acknowledgment
This research was significantly supported by the Department of Mechanical and Mechatronics Engineering, Faculty of Engineering, Prince of Songkla University.
Disclosure statement
No potential conflict of interest was reported by the authors.
Additional information
Funding
Notes on contributors
Natthaporn Kaewchoothong
Natthaporn Kaewchoothong is an Assistant Professor of Mechanical and Mechatronics Engineering at Prince of Songkla University, Thailand. He received his Ph.D. at the same university in 2019. He is interested in heat transfer enhancement inside the equipment, such as gas turbine blades, battery systems, and solar panels.
Chayut Nuntadusit
Chayut Nuntadusit is an Associate Professor of Mechanical and Mechatronics Engineering at Prince of Songkla University, Thailand. He received his Ph.D. at Osaka University, Japan, in 2004. His interests include heat transfer enhancement for jet impingement, jet flow control, and optical measurement.
Surapong Chatpun
Surapong Chatpun is an Associate Professor at the Department of Biomedical Engineering, Faculty of Medicine, Prince of Songkla University, Thailand. He received his Ph.D. in 2010 at the University of California, San Diego, USA. His current interests are in cardiovascular engineering, biomechanics, image analysis, and numerical modeling.