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首页> 外文期刊>Fuel >Effects Of Non-gray Thermal Radiation On The Heating Of A Methane Laminar Flow At High Temperature
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Effects Of Non-gray Thermal Radiation On The Heating Of A Methane Laminar Flow At High Temperature

机译：非灰色热辐射对甲烷层流高温加热的影响

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摘要

The effects of the non-gray thermal radiation on the heating of a methane/argon laminar flow at high temperature are investigated. The preheating zone of a tubular reactor is studied, where the thermal decomposition of methane does not occur. The laminar flow is simulated with the commercial Fluent code in an axisymmetric geometry. The discrete ordinates method is applied to the numerical simulation of radiative heat transfer. The non-gray gas radiative model used is the absorption distribution function (ADF) using high temperature methane radiative properties which were recently published. Several thermal entrance regions of tubular reactors are compared and the influence of methane participation in radiative heat transfer is studied. The results show that the temperature field is significantly influenced by radiation due to methane absorption. Furthermore, the average flow temperature increases when the wall temperature, the tube diameter or the methane mole fraction increases. Due to intense absorption bands of methane, it is shown that the influence of methane non-gray thermal radiation should be included in simulations of such reactors.
机译：研究了非灰色热辐射对高温下甲烷/氩层流加热的影响。研究了管式反应器的预热区，其中甲烷不会发生热分解。使用商业Fluent代码在轴对称几何形状中模拟层流。离散纵坐标法应用于辐射传热的数值模拟。使用的非灰色气体辐射模型是利用高温甲烷辐射特性的吸收分布函数（ADF），该模型最近已发布。比较了管状反应器的几个热入口区域，研究了甲烷参与辐射传热的影响。结果表明，由于甲烷的吸收，温度场受到辐射的显着影响。此外，当壁温，管径或甲烷摩尔分数增加时，平均流动温度也会增加。由于强烈的甲烷吸收带，表明在此类反应器的模拟中应包括甲烷非灰色热辐射的影响。

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