| 两流体模型中气泡粒径对掺气浓度预测结果的影响 |
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| 引用本文： | 李志高,陈刚,黄兆玮,张明亮. 两流体模型中气泡粒径对掺气浓度预测结果的影响[J]. 电网与水力发电进展, 2004, 20(1): 4-6 |
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| 作者姓名： | 李志高 陈刚 黄兆玮 张明亮 |
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| 作者单位： | 西安理工大学，西安理工大学，西安理工大学，西安理工大学 陕西西安710048，陕西西安710048，陕西西安710048，陕西西安710048 |
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| 摘 要： | 利用两流体模型,通过对水气两相流的数值模拟,研究了明渠水气两相流中气泡粒径对掺气浓度的预测,得到了气泡粒径越大,其上逸速度越快,近壁掺气浓度越低的规律,从而得知存在于近壁面的气泡主要是小粒径的气泡,提出了设计掺气槽时,除满足掺气量外还应满足掺气粒径要求的工程建议。
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| 关 键 词： | 两流体模型 气泡粒径 掺气浓度 上逸速度 |
| 文章编号： | 1671-4768(2004)01-0004-03 |
| 修稿时间： | 2003-12-10 |
The effect of bubble diameter on entrainment concentration forecast result in two-fluid model |
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| LI Zhi-gao,CHEN Gang,HUANG Zhao-wei,ZHANG Ming-liang. The effect of bubble diameter on entrainment concentration forecast result in two-fluid model[J]. Advance of Power System & Hydroelectric Engineering, 2004, 20(1): 4-6 |
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| Authors: | LI Zhi-gao CHEN Gang HUANG Zhao-wei ZHANG Ming-liang |
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| Abstract: | Air-water two-phase flow is simulated numerically with two-fluid model and the forecast of entrainment concentration with bubble diameter in open channel air-water two-phase flow is studied. The simulation result shows that air bubble upward velocity is larger when its diameter is bigger. Because the big-diameter air bubble float upward, the small-diameter air bladder remain near wall and play a role of counter-cavitation. To make best use of the function of the aerator, the demands of enough air entrainment quantity and suitable air bubble diameter are needed to be satisfied. |
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| Keywords: | two-fluid model bubble diameter entrainment concentration upward velocity |
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