Numerical Simulation of Heat Transfer Characteristics in Longitudinal Flow Circular Fin Tube Based on Fluent

Abstract

Numerical simulation method were performed to comparatively study the heat transfer and resistance characteristics of smooth tubetransversal and longitudinal flow circular fin tube and longitudinal flow slotted umbrella fin tube; researched the flowheat transfer and resistance characteristics of longitudinal flow slotted umbrella fin tube with five different fin angle. Results show that, with the same piping mode and Re number, heat transfer coefficient of longitudinal flow slotted umbrella fin tube is 1.4~1.8 times of smooth tube, heat transfer coefficient of transversal and longitudinal flow circular fin tube is 1.1~1.5 times of smooth tube, longitudinal flow slotted umbrella fin tube with α=105° has the best heat transfer coefficient; the resistance of longitudinal flow slotted umbrella fin tube is 0.25~0.75 times of transversal flow circular fin tube, and higher than longitudinal flow circular fin tube, longitudinal flow slotted umbrella fin tube with α=105° has the lowest resistance of all slotted umbrella fin tubes.