计算流体力学
湍流
燃烧
混合(物理)
大涡模拟
比例(比率)
工作(物理)
化学
分数(化学)
工艺工程
机械
工程类
机械工程
物理
物理化学
有机化学
量子力学
作者
Markus Rehm,Péter Seifert,Bernd Meyer
标识
DOI:10.1016/j.compchemeng.2008.11.006
摘要
The present work describes results of the CFD modelling of a high-pressure gasification process. For the CFD modelling of combustion processes in industrial-scale reactors the eddy dissipation concept (EDC) is often used to couple chemical reaction mechanisms to the computed flow field. However, in modelling gasification processes the EDC-model yields results, which only partly agree with the experimentally gained data. Since the available EDC-model does not accurately represent the important reformation reactions for gasification modelling, a variation of the EDC parameters for the mixing time and the fine scale fraction of a cell was accomplished. Hence, the experimental values were approached but not reached. In the present contribution on the basis of an analysis of the EDC-model and the involved time scales weaknesses of the EDC-scheme in reforming zones are discussed and a possible solution is demonstrated.
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