中文摘要：

三叶孔支撑板是广泛应用于核电站换热器中的一种管束支撑结构,其性能的好坏对核电厂的运行及安全有着重要的影响。文中运用＂单元流道＂模型,分析了流道内流动和传热的细观特性,研究了三叶孔支撑板换热器中开孔高度、支撑板间距和壳程流量对传热、压降的影响。结果表明,三叶孔支撑板换热器的性能随开孔高度和支撑板间距的增加而增加,随壳程流量的增加而降低。

英文摘要：

Trefoil-baffle support,one of the tube support structures,was extensively used in heat exchanger of nuclear power station.The performance of which had vital impact on working and security in steam generator.The influence on heat transfer and pressure drop by trefoil-hole height,support plate pitch and flow rate of trefoil-baffle support type heat exchanger had been studied numerically by means of the unit duct model.The results demonstrate that comprehensive performance of trefoil-baffle support type heat exchanger increased with an increase of trefoil-hole height and support plate pitch while decreased with the increase of shell-side flow rate.