| 纪军,范维澄.Arrhenius燃烧模型对离散网络的限制[J].火灾科学,1992,1(1):59-64. |
| Arrhenius燃烧模型对离散网络的限制 |
| The restrictions on grid discreting by using arrhenius combustion model |
| 投稿时间：1992-05-12 |
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| DOI：10.3969/j.issn.1004-5309.年.期.顺序 |
| 基金项目: |
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| 中文关键词: 网格划分 燃烧模型 准则数 |
| 英文关键词:Grid discreting Combustion model Dimensionless parameter |
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| 中文摘要: |
| 在火蔓延过程的数值模拟中，如果采用Arrhenius燃烧模型，对网格的划分有一定的限制条件。本文作者分别在层流工况和弱湍流工况下通过对油－沙池表面火蔓延过程的数值模拟研究，发现：如果采用Arrhenius燃烧模型，则不合适的网格划分会影响火焰的传播。通过对火焰传播机理的分析，提出一无量纲网格生成准则数π。如果网格划分的网格准则数π大于其临界准则数π0，则网格的划分不会影响火焰传播过程，即网格的划分是合适的，反之，若π＜π0，则所划分的网格就是不合适的，须重新生成网格。 |
| 英文摘要: |
| If the Arrhenius combustion model was applies,there would be some restrictions on the scale of grid.The results from the numerical studies of the flame spreading over the oil-sand pool under the laminar condition and turbulent condition,respeetively,showed that if Arrhenius combustion model was applied in the numerical simulating,unsuitable grid discreting had the bad influence on the flame spreading,it could made the numerical results wrong.Having analyzed the mechanism of flame spreading,a dimensionless parameter on the grid discreting--π number was proposed.If the π number of the grid discreting is large than π0--the threshold of the grid discreting,the grid disreted has no influence on the flame spreading,the grid discreted is suitable.Otherwisc,ifπ＜π0,the grid discreted is unsuitable,the grid must be produced again. |
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