为探究内置椭球形插件的环形内肋凸胞管的流体动力学及热传递特性，以增强其综合热交换效能，采用数值模拟技术对光滑管与环形内肋凸胞管内置椭球形插件的流体流动及热交换特性进行了对比分析。通过此分析，验证了环形内肋凸胞管内置椭球形插件在热交换方面的优势，并进一步探讨了长短轴比、倾角、节距三种插件结构参数对环形内肋凸胞管热工性能的影响。研究结果显示，在环形内肋凸胞管中引入插件后，由于插件与凸胞的协同作用，显著提升了热交换效率。与未引入插件的环形内肋凸胞管相比，其性能评价系数（performance evaluation criterion, PEC）最大增幅可达13.62%。在保持倾角和节距不变的条件下，长短轴比为9∶5时，PEC值可达到最大值1.34。在固定节距和长短轴比的情况下，当倾角为30°时，管内综合热传递性能最优。而在保持倾角和长短轴比不变的条件下，节距为20 mm时，PEC相较于环形内肋凸胞管的最大增幅可达20.30%。

In order to investigate the fluid dynamics and heat transfer characteristics of annular inner ribbed convex cells with ellipsoid inserts and enhance their comprehensive heat exchange efficiency, the fluid flow and heat exchange characteristics of smooth tubes and annular inner ribbed convex cells with ellipsoid inserts were compared by numerical simulation techniques. Through this analysis, the advantages of ellipsoidal plug-in in annular inner ribbed convex cell were verified in heat exchange, and the effects of three plug-in structural parameters, such as long-axial ratio, inclination angle and pitch on thermal performance of annular inner ribbed convex cell were further discussed. The results show that the heat exchange efficiency is significantly improved due to the synergistic effect between the plug-in and the convex cell after the plug-in is introduced into the annular inner rib convex cell. The performance evaluation criterion (PEC) can be increased by 13.62% as compared with the annular inner ribcage without plug-in. Under the condition of keeping the angle and pitch unchanged, the maximum PEC value can reach 1.34 when the ratio of long axis to long axis is 9∶5. Under the condition of fixed pitch and long axis ratio, the comprehensive heat transfer performance of the tube is the best when the inclination is 30 degrees. When the pitch is 20 mm, the maximum increase of PEC compared to the annular inner ribered convex tube can reach 20.30% under the condition of keeping the inclination angle and the ratio of long and short axis unchanged.