甲烷在逆流换热微燃烧器内催化燃烧的数值模拟

NUMERICAL SIMULATION OF METHANE CATALYTIC COMBUSTION IN MICRO-BURNER WITH COUNTERFLOW HEAT EXCHANGER

本文联合使用CFD软件FLUENT和化学反应动力学软件DETCHEM对甲烷-空气混合物在有逆流换热的微燃烧器内的催化燃烧进行了数值模拟。计算中只考虑了甲烷在催化表面上的反应。燃料-空气混合物的当量比为0.4,燃烧器外壁面与环境采用对流换热边界条件。计算结果表明,同时采用逆流换热和表面催化燃烧可以实现常规方法无法实现的甲烷稳定、高效转变。

In this paper was preformed numerical simulation of catalytic combustion of CH4 for micro-burner with counterflow heat exchanger using both FLUENT and surface chemistry subroutine DETCHEM. The reactions at catalytic surface were considered in calculations only. Stoichiometric ratio of fuel-air mixture is 0.4. Convection heat exchange has adopted as a boundary condition of external surface. Results indicate that methane can be steadily converted in high efficiency when counterflow heat exchanger and surface catalytic combustion were adopted.