Effect of Short Tube Diameter on Heat Transfer Performance of Short Tube Honeycomb Jacket
Based on the short tube honeycomb jacket structure of a drying machine in a certain project,the size of the short tube was set at φ 90 mm×5 mm and gradually increased to φ135 mm×7.5 mm.A finite element model was established to calculate the flow field of six jacket models,from model 1 to model 6.The velocity and temperature distribution characteristics of each model were simulated and analyzed,and the total heat transfer coefficient of each model was calculated and compared at different volume flow rates.The simulation data shows that as the size of the short tube increases,the maximum flow velocity in the jacket fluid domain shows a continuous decreasing trend.As the size of the short tube increases,the uniformity of the temperature field in the jacket fluid domain first increases and then decreases,and model 5 has the best uniformity of the temperature field distribution,the total heat transfer coefficient is the highest.As the volume flow rate increases,the total heat transfer coefficient of the jacket continues to increase.As the diameter of the short tube increases,the total heat transfer coefficient of the jacket first increases and then decreases,with model 5 having the highest total heat transfer coefficient.A comprehensive analysis shows that increasing the diameter of the short tube within a certain range can improve the heat transfer performance of the jacket.
NETL
NSTL
万方数据
维普
