文档介绍
| A 2D
model is built on the package of FLUENT to study the effects of radial aspect
ratio(R/W),length-to-width ratio(L/W),strain rate(SR),and buoyancy(Ri=Gr/Re2)
on the validation of the simplified 1D model.In the present 2D model,the
methane/air homogeneous reaction mechanism of Peters and the
methane/air/platinum heterogeneous reaction mechanism of Deutschmann are
applied.By comparison between the 1D and 2D numerical results,it is found
that the validation of 1D model is highly related with the catalytic
stagnation reactor configuration.For length-to-width ratio L/W = 1
configuration,1D laminar model is applicable when the radial aspect ratio R/W
> 0.4.For R/W = 0.6,the reactor exhibited 1D characteristics when L/W <
1.Compared with the temperature and species profiles,the velocity
distribution along the axis is more sensitive to the change of radial aspect
ratio and length-to-width ratio.With increasing of the strain rate,the flame
front goes closer to the catalytic wall surface and the difference between
the 1D and 2D results decreases.For a valid 1D simulation,it is recommended
that the strain rate should be greater than 20 s-1.The effects of natural
convection can be neglected when Ri < 5. 验证一维模型的甲烷/空气/ Pt的停滞流燃烧 |
文档标签:
流体力学
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