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首页> 外文期刊>Journal of Thermophysics and Heat Transfer >Mathematical Modeling of Catalytic-Surface Combustion of Reacting Flows
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Mathematical Modeling of Catalytic-Surface Combustion of Reacting Flows

机译：反应流催化表面燃烧的数学模型

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Catalytic combustion of methane-air mixtures involves the adsorption of the fuel and oxidant into a platinum surface, chemical reactions of the adsorbed species, and the desorption of the resulting products. Readsorption of some produced gases is also possible. The present paper is concerned with the numerical computation of heat transfer and chemical reactions in flowing methane—air mixtures impinging vertically on a platinum-coated hot plate. Seventy-three elementary reactions are included in the gas phase and in the solid platinum surface. The platinum surface temperature is fixed, whereas the properties of the reacting flow are computed. Finite-volume equations are solved iteratively for the reacting gas flow properties. In the platinum surface, surface species balance equations under steady-state conditions are solved numerically. The agreement with existing numerical data is fairly good for all main combustion products, whereas differences are observed for the rare species such as CO, O, H, HO_2, and CH_2O. The accuracy of the present results is accessed by checking the balance of the carbon element in the present carbon-containing compounds and similar published numerical data. The computational results for chemical reactions and mass transfer at the gas-surface interface are correlated by nondimensional relations.
机译：甲烷-空气混合物的催化燃烧涉及燃料和氧化剂在铂表面的吸附，所吸附物质的化学反应以及所得产物的解吸。一些产生的气体的再吸收也是可能的。本文涉及流动的甲烷-空气混合物垂直撞击到镀铂热板上的传热和化学反应的数值计算。气相和固体铂表面中包含73个基本反应。铂表面温度是固定的，而计算反应流的性质。迭代求解反应气体流动特性的有限体积方程。在铂表面，通过数值求解稳态条件下的表面物种平衡方程。对于所有主要燃烧产物，与现有数值数据的一致性都很好，而对于诸如CO，O，H，HO_2和CH_2O这样的稀有物种，则观察到差异。通过检查本发明的含碳化合物中碳元素的平衡和类似的公开数值数据，可以得出本结果的准确性。气体-表面界面处化学反应和传质的计算结果与无量纲关系相关。

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