A folded plate mesh finned tube structure

Abstract

This utility model discloses a folded plate mesh finned tube structure, including an outer finned tube, an inner finned tube, a double-finned tube, and a sleeve-type double-finned tube. This utility model uses a metal plate mesh hydraulically folded to form a continuous edge structure as the outer fin. The pore structure of the plate mesh itself and the three-dimensional edges formed by folding, as well as the star-shaped cross-section edges, induce airflow to generate detached vortices, breaking the boundary layer thermal resistance. Compared with traditional straight fins, the heat transfer coefficient is improved. Compared with traditional straight or spiral fins, it provides a denser and more complex heat exchange surface per unit volume. The sharp edges and complex geometry are like countless micro-turbulents, strongly disturbing the airflow or liquid flow, effectively breaking the laminar sublayer on the wall, significantly reducing the boundary layer thermal resistance, and enhancing turbulent mixing. The discontinuity of the folded edges and the specific angle design induce the fluid to generate strong vortex shedding and secondary flow, greatly enhancing the convective heat transfer intensity between the fluid and the fins, and between the fluid and the base tube.

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