2D PIV analysis of the flow dynamics of multiple jets impinging on a complex moving plate

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Barbosa, FV (Author) Other; Teixiera, SFCF (Author) Other; Teixeira, JCF (Author) Other

Journal

Title: International Journal of Heat and Mass Transfer

Vol. 188

ISSN: 0017-9310

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 19 Citations

Scopus - 20 Citations

Other information

Authenticus ID: P-00W-1JT

DOI: 10.1016/j.ijheatmasstransfer.2022.122600

Abstract (EN): The enhancement of the multiple jet impingement process relies on several geometrical and flow parameters which highly influence the heat transfer over the target plate. Therefore, the detailed analysis of the effect of these parameters on multi-jet flow dynamics and heat transfer is of paramount importance. To conduct this study, a Design of Experiment (DoE) based on Taguchi's method is implemented to optimize the number of experiments and provide a comparative parameter analysis. This method is applied with the goal of optimizing the process for the maximum Nusselt number and the best configuration for both static and dynamic plates is obtained for a Reynold number of 50 0 0, a nozzle-to-plate distance (H/D) of 2, and a jet-to-jet spacing (S/D) equal to 3. Even if the effect of the jet pattern and plate geometry is considered negligible compared with these factors, staggered jet's configuration and non-flat plate seem to enhance the heat transfer over the surface. To complement this analysis, PIV measurements are conducted in order to characterize the jet's flow and to validate the suitability of Taguchi's method for the study of complex multiple jet impingement processes. The results demonstrated that even for low surface-to-jet velocity ratios (Vs), complex flow interactions are identified leading to an increase of the average Nusselt number. From the experiments, the optimized configuration is validated. This study provided relevant data, mainly for the dynamic surface case, and new correlations for both static and moving plates are presented.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 17