中文摘要：

本文以竖直圆管内壁催化剂薄层内发生甲烷水蒸气重整反应强化对流换热作为研究对象，对其进行了数值模拟。结果发现，催化剂薄层内的吸热化学反应可以有效地强化对流换热，降低流体和壁面温度，从而对壁面起到保护作用；极限热流密度的大小与流体的入口温度有关，存在最佳入口温度使极限热流密度最大。

英文摘要：

Convection heat transfer accompanied with steam reforming of methane in catalyst films in a vertical tube was investigated numerically. The numerical results showed that endothermic chemical reaction in catalyst films can enhance convection heat transfer effectively and decrease the temperature of the coolant and surface. The burned heat flux is related to the inlet temperature and the best inlet temperature exists to get the maximum burned heat flux.