The design and manufacture of high-performance heat exchangers are essential in increasing the efficiency of thermodynamic cycles and reducing the weight of heat exchangers and cooling facilities in aerospace industries. The present research conducted numerical and experimental studies of the Schwarz-P and Gyroid geometries for use as heat exchangers due to their high surface-to-volume ratio. Although these two structures have exhibited good mechanical properties in previous research, a few studies have addressed the potential use of these geometries for heat transfer applications. Based on finite element simulation results of these structures in COMSOL Multiphysics for a Reynolds number range of 10-100 for water (with a Prandtl number of 3-6), the Schwarz-P structure experiences a smaller pressure drop compared to the Gyroid structure; however, it has low efficiency and is unsuitable for use as a heat exchanger. On the other hand, the Gyroid heat exchanger exhibited 40% and 20% improvements in the Nusselt number and efficiency, respectively, compared to the corresponding tube bank. In addition, several gyroid heat exchangers made of polymer-lactic acid (PLA) and aluminum alloy (AlSi10Mg) were studied and constructed via additive manufacturing for empirical tests. Ultimately, experimental eva‎luations were carried out for the metal gyroid heat exchanger for flow rates of 1-3 l/min (Reynolds number range of 1600-5000). It must be noted that laboratory tests at low Reynolds numbers could not be conducted due to equipment limitations.

احمد سوهانكار

محمدرضا توكلي، محسن دوازده امامي