Abstract Quatrefoil perforated plate (QPP) is a kind of whole circular support plate for the shell side of shell-and-tube heat exchanger (STHX), and the design and optimization of heat exchanger with this support structure are the key technologies to study and improve the performance of heat exchanger. The influences of the hole height and plate spacing of the QPP on the thermal-hydraulic performance of the heat exchanger were studied mainly by using computational fluid dynamics (CFD) method. And the reliability and accuracy of the numerical results were verified by compared with experimental results. With Reynolds number varying from 5000 to 20,000, the results show that the heat transfer coefficient and pressure drop in the shell side of the heat exchanger both increase with the decrease of the hole height and the plate spacing of the QPP, but the shell side heat transfer coefficient per unit pressure drop h/Δp decreases. Under the conditions of the same fluid flow rate and same plate spacing, compared with segmental baffle heat exchanger, the comprehensive performance h/Δp of heat exchanger with QPPs is improved by 27%–41%. The empirical correlations for Nusselt number and pressure drop in the shell side of heat exchanger with QPPs were obtained and the calculation deviation of correlations both are within ±10%, which can be used to guide engineering design and practice.

中文翻译：

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四叶形穿孔板换热器壳程热工水力特性研究

摘要 四叶形多孔板（QPP）是一种用于管壳式换热器（STHX）壳程的整体圆形支撑板，这种支撑结构的换热器的设计和优化是研究和开发的关键技术。提高换热器的性能。主要采用计算流体动力学（CFD）方法研究了QPP孔高和板间距对换热器热工水力性能的影响。并通过与实验结果的对比验证了数值结果的可靠性和准确性。雷诺数从5000到20000变化，结果表明换热器壳程传热系数和压降都随着QPP孔高和板间距的减小而增大，但单位压降的壳侧传热系数h/Δp减小。在相同流体流量和相同板间距的条件下，与分段式折流板换热器相比，QPPs换热器的综合性能h/Δp提高了27%~41%。得到了QPPs换热器壳侧努塞尔数和压降的经验相关性，相关性计算偏差均在±10%以内，可用于指导工程设计和实践。