| 王晓玲,周莎莎,马 斌,李 涛.输水暗涵水气两相流数值模拟[J].水利学报,2010,41(11): |
| 输水暗涵水气两相流数值模拟 |
| Numerical simulation of water-air two-phase flow in buried culvert |
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| DOI： |
| 中文关键词: VOF法 水气两相流 k - ε 模型 水流速 输水暗涵 |
| 英文关键词: VOF method water-air two-phase flow k-ε model buried culvert siphon |
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| 中文摘要: |
| 本文建立了耦合VOF法的三维非稳态水气两相流 k - ε 模型，同时考虑了沿程壁面粗糙度的影响。结合南水北调东线一期工程济南段进行了输水暗涵水气两相流数值模拟。首先与水工模型水深和流速分布的试验结果进行了对比分析，吻合较好；其后重点分析了实际工程中输水暗涵下卧段的流场情况，结果表明：下卧段入口和出口处水流过渡较好，与下卧段水工模型试验观察到的现象一致；在过流断面上，流速是非均匀的。此外还模拟得到了输水暗涵沿程水深分布情况，总体上水深呈下降趋势。 |
| 英文摘要: |
| A 3D unsteady k-ε model coupled with the Volume of Fluid （VOF） method of water-air two-phase flow was established，in which the roughness of walls was considered. The model was applied to simulate the water-air two-phase flow in the buried culvert of Jinan reach of the South-to-North Water Transfer Project. The good agreement between simulated result and model test result verified the validity of the model. On this basis，the model was used to calculate the flow in the buried culvert in prototype with emphasis laid on the analysis of the flow in an inverted siphon. The results show that the flow in transi?tion sections of inlet and outlet of the siphon is gentle，but the velocity distribution is not uniform in cross section. Furthermore，the flow depth along the channel is obtained which exhibits a downward trend. |
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