大小孔折流板换热器壳程传热与阻力性能研究

In order to discover the heat transfer mechanisms of the shell side of Large and small hole (LASH) baffle heat exchanger, heat transfer performance and flow resistance of the shell side of the LASH were investigated experimentally, and were investigated numerically by applying realizable k-ε turbulent model. The results indicate that under the different Reynolds of the import, compared the calculated results with the experimental results, the error of heat transfer coefficient of shell-side is 7.9%, the error of the pressure drop is small, only 3.1%. The numerical calculation model selected is correct and feasible. The local heat transfer coefficient and local friction coefficient outside the tube increase quickly when the flow jet acceleration through the small hole. The LASH baffle heat exchanger presents a larger shell-side heat transfer coefficient and lower shell-side pressure drop.