Ceramic Catalytic Turbine (CCT) Technology is expected to become an important means to reduce vehicle emissions, especially during engine warm-up. In this paper, catalytic reaction was numerically simulated in 3D for a CCT on a gasoline engine during the warm-up period. The results showed that turbulence in the turbine promotes catalytic activity; CCT starts to significantly affect exhaust pollution since turbine inlet temperature of 550 K; the conversion efficiency of harmful gas in exhaust rises sharply when turbine inlet reaches 575–625 K; when the inlet temperature is about 720 K, the conversion efficiencies of C₃H₆, CO, and NO reach 23.7%, 21.1%, and 15.5%, respectively. Meanwhile the gas temperature is increased by about 30 K at turbine outlet. In addition, during the process of numerical modeling and calculation, it is found that minor change in boundary layer thickness has a negligible impact on the simulation. However, an extremely thin boundary layer will cause computational divergence. The intensity of catalytic reaction can influence the convergence of numerical calculation, while the moving average of the catalytic reaction with the turbine inlet temperature, in return, can reveal the catalytic light-off process.

陶瓷催化涡轮（CCT）技术有望成为减少车辆排放的重要手段，尤其是在发动机预热期间。在本文中，对汽油发动机在预热期间的 CCT 的催化反应进行了 3D 数值模拟。结果表明，涡轮中的湍流促进了催化活性；汽轮机入口温度达到 550 K 后，CCT 开始显着影响排气污染；当涡轮进口达到575-625 K时，废气中有害气体的转化效率急剧上升；当入口温度约为 720 K 时，C ₃ H ₆的转化效率为、CO 和 NO 分别达到 23.7%、21.1% 和 15.5%。同时，涡轮出口处的气体温度增加了约 30 K。此外，在数值建模和计算过程中，发现边界层厚度的微小变化对模拟的影响可以忽略不计。然而，极薄的边​​界层会导致计算发散。催化反应的强度会影响数值计算的收敛性，而催化反应与涡轮进口温度的移动平均值反过来可以揭示催化起燃过程。