evaluation of the thermo-fluid performance of a split-winglet supported elliptical tube type fin-and-tube heat transfer surface

The main objective of the current study is to investigate the vortex generator supporting fin-tube heat transfer surface equipped with inline elliptical tubes by performing numerical simulations governed by finite volume method. it also aims at minimizing air-side thermal resistance using rectangular winglet pairs. then, the thermo- uid performance of the baseline model was evaluated for the circular and elliptical tube configurations. according to the findings, while the former increased the heat transfer, the latter decreased the pressure drop. the effect of the span- and stream-wise separation of the split winglet pair and attack angle on the heat transfer and pressure drop performance was also examined in detail, the results of which were presented in the forms of nu, f, and ŋ. the optimum stream- and span-wise locations for the front and rear winglet pairs were identified based on highest enhancement factor. it was also found that the optimum attack angle of the front and rear winglet pairs was dierent for the maximum enhancement factor.