基于FLUENT的管壳换热器壳程流场数值模拟与分析

通过简化管壳式换热器模型,采用非结构网格划分,选用κ-ε湍流模型,应用CFD软件FLUENT对壳程流体流动和传热过程进行了数值模拟,得到了不同折流板间距情况下壳程流体温度场、压力场以及速度场的分布情况。分析了折流板间距对壳程流体流场分布、换热器传热速率以及压力损失的影响,并得出了进口流速与传热量和压力损失之间的关系。模拟结果与理论研究结果相符合,对管壳式换热器的设计和改进有一定的参考价值。

Numerical Simulation and Analysis of Shell-Side Flow Field in Shell-and-Tube Heat Exchanger Based on FLUENT

By simplified the model of shell-and-tube heat exchangers, adopted the unstructured mesh, chose the K-6 turbulence model to gain the static temperature field, velocity field and static pressure field distribution of shell by taking numerical simulation of the shell side turbulent flow and heat transfer process with the CFD software FLUENT at different baffle spacing. Analyzed the effect of baffle spacing on the distribution of shell fluid flow, heat transfer rate and pressure drop, also acquired the relationship between inlet velocity and heat transfer rate, pressure drop. The simulation results consistent with the theoretical results of shell-and-tube heat exchangers, which can be a reference for the design and improvement of shell-and-tube heat exchangers.