缠绕管式换热器壳程高黏度流体流动及换热性能强化研究

In order to solve the problem of low heat transfer efficiency for high viscosity media in compact heat exchangers such as spiral-winding tube heat exchangers, a new disturbing device was proposed. The flow pattern of fluid between shell side tube bundles was multi cylinder turbulence. The disturbing device can affect the wake field formed by tube bundles, which changes the flow pattern of fluid in shell side and enhances the comprehensive heat transfer performance of high viscosity fluids. Compared with traditional structure, numerical simulation methods show that the Nusselt number of the shell side of the new structure can be increased by 5.1% to 8.4%, the friction factor can be increased by 1.3% to 3.3%, and the comprehensive heat transfer performance can be improved by 4.6% to 5.2%. Furthermore, effects of disturbing device structure on the target parameters were studied. This study provides a theoretical basis for improving the flow and heat transfer performance of high viscosity media in spiral-winding tube heat exchangers and improves the application scope of compact heat exchangers. It makes high viscosity media in compact heat exchangers achieve ideal heat transfer effects.