Channel centerline temperature data pertaining to catalytically supported thermal combustion systems with thermally conductive materials

The channel centerline temperature data are obtained for the catalytically supported thermal combustion systems with thermally conductive materials. The system is modeled as two channels and a catalyst layer with very small dimensions. These dimensions could be increased or decreased as desired for particular applications. This design analysis treats some of these dimensions as variables, and some as constrained by combustion stability considerations. In order for flame holding to occur, methane and air must be premixed and provided in an appropriate velocity region to reside. Methane and air are perfectly premixed with a temperature of 300 degrees Kelvin before they enter the system prior to combustion. The strength of the mixture composition is typically expressed in terms of its equivalence ratio. Platinum is catalytically-active towards promoting the heterogeneous surface reaction. Complex modeling methods and algorithms are required for the system due not only to the complex geometry of the system but also the complex physicochemical processes involved. Steady-state analyses are performed, variations in system pressure and temperature are determined in accordance with the ideal gas law, and the system operates in the laminar flow regime due to the small Reynolds numbers. The maximum Reynolds number is less than 360 at the flow inlet and 960 when the velocity of the flow of the fluid is highest in the channels. The model is implemented in commercially available software FLUENT to obtain the solution of the problem. Detailed chemistry is included in the model. Detailed chemical mechanisms are playing an increasingly important role in developing chemical kinetics models for combustion. Detailed chemical mechanisms are incorporated into the reacting flow for the system. The homogeneous combustion is modeled with the detailed chemical mechanism for methane oxidation in CHEMKIN format. Detailed heterogeneous chemistry in SURFACE-CHEMKIN format is included in the model. The rates of the elementary reactions involved in the combustion process are determined by Arrhenius kinetic expressions. Numerical simulations with the detailed chemical mechanism are typically computationally expensive. The detailed chemical mechanism is invariably stiff and therefore its numerical integration is computationally costly.
Contributor: Junjie Chen, E-mail address: [e-mail], ORCID: 0000-0002-5022-6863, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China