| 程香菊,陈永灿.波浪形底板上水跃的数值模拟[J].水利学报,2005,36(10):1252-1257 |
| 波浪形底板上水跃的数值模拟 |
| Numerical simulation of hydraulic jumps on corrugated beds |
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| DOI： |
| 中文关键词: 波浪形底板 水跃 数值模拟 漩滚 |
| 英文关键词: corrugated bed hydraulic jump numerical simulation length of roller |
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| 摘要点击次数: 2080 |
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| 中文摘要: |
| 利用标准k-ε模型封闭Reynolds方程作为紊流控制方程，引入水气二相流体积率模型跟踪自由水面，对5种不同工况下的波浪形底板上水跃的演变进行数值模拟，充分显现了水跃的发展过程、自由水面的变化、流速的分布和水跃漩滚长度等。实测结果验证了模型和数值方法的可靠、合理性。对比平滑与波浪形底板上形成的水跃长度可以看出，波浪形底板上的水跃长度小于光滑形底板上水跃长度，可以有效地缩短消力池的长度，从而减少工程造价。 |
| 英文摘要: |
| The trubulence characteristics of hydraulic jumps on corrugated beds under 5 kinds of conditions were investigated numerically by means of standard k-εturbulence model. The fractional volume of fluid model for the water-air two-phase flow was employed to track the moving free surface. The numerical results reveals the developing progress of hydraulic jumps, the change of free water surface, the velocity distribution and the roller length etc. The meausred results validate the reliability of the numerical model and method. The roller length on corrugated bed is shorter than that on smooth bed. It is shown that the hydraulic jumps on corrugated beds can effectively shorten the length of stilling basin and save the cost of project. |
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