内部带旋转肋片的直流蒸汽发生器传热管热工水力性能实验研究

Performance Test of a New Type Heat Exchange Tube with Internally Revolved Rib in Once-Through Steam Generator

对一种新型的传热管内部带旋转肋片式的直流蒸汽发生器传热管传热性能进行实验研究,分析不同流量工况下带旋转肋片传热管的换热系数以及螺距对努塞尔数(Nu)的影响规律。研究表明,在高雷诺数(Re)工况下旋转肋片对传热管换热性能影响明显,旋转肋片螺距的减小能够提高传热管换热性能。

Looking for high-performance and minimized heat exchange tube is one of the way for improving the performance of Once-through steam generator（ OTSG ）. This paper introduced the thermal-hydraulic experimental research on a new type heat exchange tube with internally revolved rib. The test system and the experiment model were presented. The heat transfer coefficient of the heat exchange tube and the influence of pitch on Nu were analyzed under different mass flow. The revolved rib showed a distinctive improvement on heat transfer performance under high Re condition, and minimizing the pitch was a good choice to enhance the heat exchange.