Application of Taguchi Method for the Analysis of a Multiple Air Jet Impingement System with and without Target Plate Motion

• Published in: International journal of heat and mass transfer Vol. 176; p. 121504
• Main Authors: Barbosa, Flávia V., Sousa, Sérgio D.T., Teixeira, Senhorinha F.C.F., Teixeira, José C.F.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.09.2021; Elsevier BV
• Subjects: Aerodynamics; Air jets; ANOVA; Design of experiments; DoE; Fluid flow; Heat Transfer; Jet Impingement; Optimization; Process parameters; Reflow soldering; Reynolds number; Staggered configuration; Surface motion; Taguchi Method; Taguchi methods; Variance analysis; DoE; Heat Transfer; Taguchi Method; ANOVA; Jet Impingement
• ISSN: 0017-9310; 1879-2189
• DOI: 10.1016/j.ijheatmasstransfer.2021.121504

•Taguchi's method allows to reduce the number of experiments from 768 to 96.•Main-effect plots and ANOVA analysis allow to determine the process variables that optimize the heat transfer performance over the impinging plate.•The optimized configuration obtained by Taguchi's method is S = 3D, H = 2D for a staggered configuration, and a higher Reynolds number for both static and moving plates.•The effect of nozzle-to-plate distance and target plate geometry on heat transfer is slightly higher in the moving plate compared with the static plate.•Non-flat impinging surfaces increase the complexity of the flow and consequently induce a higher heat transfer in the vicinity of the wall. Multiple air jet impingement is a complex heat transfer process involving several parameters which interfere with the cooling and heating performance. Due to its wide applicability in engineering applications, the influence of these parameters in jet impingement efficiency has been extensively analyzed by several researchers. However, the majority of the studies developed experiments and numerical simulations to determine the effect of each parameter individually. Considering that the heat transfer performance depends on the correct combination of the multiple jet impingement parameters, the implementation of a Design of Experiments (DoE) seems to be more effective since this method allows a comparative parameter analysis as well as an optimization of the experiments and numerical simulations. In this study, a DoE based on the Taguchi method and an Analysis of Variance (ANOVA) is applied to conduct an experimental study on multiple air jets impinging a surface. This work focuses on jet-to-jet spacing (S), nozzle-to-plate distance (H), Reynolds number, and target plate geometry. Taking into consideration these four parameters, the experiments are conducted with the target plate static and in motion and the results obtained in both cases are compared. Even if the static target plate is the most studied case, the surface motion is identified in several engineering applications, such as reflow soldering and drying processes. The results show that the heat transfer of a multiple jet impingement configuration is enhanced by S=3D, H=2D for a staggered configuration, and a higher Reynolds number for both static and moving plates.