Net Shape Fins for Compact Heat Exchanger Produced by Cold Spray

作者：Cormier Yannick^*; Dupuis Philippe; Jodoin Bertrand; Corbeil Antoine

来源：Journal of Thermal Spray Technology, 2013, 22(7): 1210-1221.

DOI：10.1007/s11666-013-9968-x

• cold spray
• compact heat exchanger
• heat transfer
• net shape forming
• pyramidal fin array

This work explores the manufacturability of pyramidal fin arrays produced using the cold spray process. Near-net shaped pyramidal fin arrays of various sizes and fin densities were manufactured using masks made of commercially available steel wire mesh. The feedstock powders used to produce the fins are characterized using scanning electron microscopy. Obstruction of the masks was investigated. The standoff distances between the substrate, mesh, and nozzle were empirically determined. Fin array characterization was performed using digital microscopy. The fin arrays%26apos; heat transfer performance was assessed experimentally for a range of Reynolds number relevant to the application sought. The fins produced using the cold spray process outperform traditional straight (rectangular) fins at the same fin density and it is hypothesized that this is due to increased fluid mixing and turbulence.

• 出版日期2013-10