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中文摘要：
本文对连续螺旋折流板管壳式换热器的一个周期，采用周期性充分发展模型对不同的旁路挡板数量和宽度对换热器壳侧流动换热性能影响进行数值模拟分析。计算结果表明：1）随着旁路挡板数量增加，在相同挡板宽度和相同质量流量条件下，壳侧换热系数提高9．3％～41．7％，同时压损升高37．5％～189．7％；2）随着旁路挡板宽度增加，在相同挡板数量和相同质量流量条件下，壳侧换热系数提高116％～34．5％，同时压损升高11．1％～146．6％。
英文摘要：
In the present paper, numerical simulations are carried out to based on FLUENT study the effects of locations and width of the by-pass damper on shell side flow and heat transfer of a shell-and-tube heat exchanger （STHX） with continuous helical baffles by using periodic model and periodic boundary conditions. The results show that under the same mass flow rate M and the width of the sealing strips W, with the increase of the sealing strip number, the shell side heat transfer coetfficient h is 9.3%～41.7% higher than that without sealing strips while the overall pressure drop △p increases by 37.5%～189.7%. Four uniformly distributed sealing strips is the optimal structure. Under the same mass flow rate M and the sealing strip number, with the increase of the width of the sealing strips W, the h increases by 1.6%～34.5% while the Ap increases by 11.1%～146.6%.
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