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为研究微尺度催化燃烧的规律,联合使用计算流体力学软件FLUENT和计算表面催化反应的化学反应动力学软件DETCHEM对微型直通道中甲烷/空气预混气体在镀Pt热表面上的催化燃烧进行了数值模拟。假定燃料混气入口当量比为0.4和1.0,入口速度为0.08～0.64m.s-1。计算结果表明:在微尺度条件下,空间反应对表面催化反应的影响可以忽略,表面催化反应对空间反应有一定的抑制作用;混气入口速度的提高会抑制表面催化反应,但如果相应增加催化剂量,提高混气入口速度将促进表面催化反应。
In order to study the law of microscale catalytic combustion, the catalytic combustion of methane / air premixed gas on Pt-coated hot surfaces in micro straight passage was carried out by using the computational fluid dynamics software FLUENT and DETCHEM, a chemical reaction kinetic software for calculating the surface catalytic reaction simulation. Assuming a fuel-air inlet equivalent ratio of 0.4 and 1.0, the inlet velocity is 0.08 to 0.64 m.s-1. The results show that the effect of the space reaction on the surface catalytic reaction is negligible, and the surface catalytic reaction has a certain inhibitory effect on the space reaction at the micro-scale. The increase of the gas inlet velocity will inhibit the surface catalytic reaction. However, if the catalyst The amount of gas to improve the entrance speed will promote the surface catalytic reaction.