Flow structure and heat transfer analysis of the floatation nozzle with a moving wall
ISSN: 0264-4401
Article publication date: 29 May 2020
Issue publication date: 27 January 2021
Abstract
Purpose
This study aims to investigate the effects of different surface-to-jet velocity ratios (Rsj) on the flow structure and the heat transfer of the floatation nozzle under different ratios (h/w) of the separation distance (h) to the slot width (w) and the differences of the flow structure and the heat transfer between the floatation nozzle and the slot nozzle.
Design/methodology/approach
The Nusselt number (Nu) and the pressure distribution of the floatation nozzle with a stationary wall are measured. Then the experimental results are used to validate the numerical model. Finally, a series of numerical simulations is carried out to achieve the purpose of this study.
Findings
The flow structure and heat transfer differences between the floatation nozzle and the slot nozzle are clarified. The floatation nozzle has more than 18 times the floatation ability of the unconfined slot nozzle. The Nu and pressure distributions of the floatation nozzle are experimentally measured. The effects of wall motion on the Nu and pressure distributions are identified.
Originality/value
The effects of the wall motion on the flow structure and the heat transfer of the floatation nozzle, and the differences between the floatation nozzle and the slot nozzle are first obtained. Therefore, it is valuable for engineers in engineering design of the floatation nozzle.
Keywords
Acknowledgements
This work is supported by the National Key R&D Program of China (No.2018YFB1106700), Guangdong Innovative and Entrepreneurial Research Team Program (No.2016ZT06G666) and the National Natural Science Foundation of China (No.51675199 and 51635006).
Conflict of interest: The authors declared that they have no conflicts of interest to this work.
Citation
Huang, T., Yang, Z., Diao, S., Huang, Z., Zhang, Y. and Zhou, H. (2021), "Flow structure and heat transfer analysis of the floatation nozzle with a moving wall", Engineering Computations, Vol. 38 No. 1, pp. 36-57. https://doi.org/10.1108/EC-01-2020-0046
Publisher
:Emerald Publishing Limited
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