| Two-phase flow simulation of aeration on stepped spillway |
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| 作者姓名： | CHENG Xiangju LUO Lin ZHAO Wenqian LI Ran |
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| 作者单位： | State Key Laboratory of Hydraulics on High Speed Flows, Sichuan University, Chengdu 610065, China,State Key Laboratory of Hydraulics on High Speed Flows, Sichuan University, Chengdu 610065, China,State Key Laboratory of Hydraulics on High Speed Flows, Sichuan University, Chengdu 610065, China,State Key Laboratory of Hydraulics on High Speed Flows, Sichuan University, Chengdu 610065, China |
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| 摘 要： | Stepped spillways have existed as escape works for a very long time. It is found that water can trap a lot of air when passing through steps and then increasing oxygen content in water body, so stepped spillways can be used as a measure of re-aeration and to improve water quality of water body. However, there is no reliable theoretical method on quantitative calculation of re-aeration ability for the stepped spillways. By introducing an air-water two-phase flow model, this paper used k-ε turbulence model to calculate the characteristic variables of free-surface aeration on stepped spillway. The calculated results fit with the experimental results well. It supports that the numerical modeling method is reasonable and offers firm foundation on calculating re-aeration ability of stepped spillways. The simulation approach can provide a possible optimization tool for designing stepped spillways of more efficient aeration capability.
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| 关 键 词： | stepped spillway two-phase flow turbulence modeling numerical simulation water re-aeration |
Two-phase flow simulation of aeration on stepped spillway |
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| CHENG Xiangju,LUO Lin,ZHAO Wenqian,LI Ran.Two-phase flow simulation of aeration on stepped spillway[J].Progress in Natural Science,2004,14(7):626-630. |
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| Authors: | CHENG Xiangju LUO Lin ZHAO Wenqian LI Ran |
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| Institution: | State Key Laboratory of Hydraulics on High Speed Flows, Sichuan University, Chengdu 610065, China |
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| Abstract: | Stepped spillways have existed as escape works for a very long time. It is found that water can trap a lot of air when passing through steps and then increasing oxygen content in water body, so stepped spillways can be used as a measure of re-aeration and to improve water quality of water body. However, there is no reliable theoretical method on quantitative calculation of re-aeration ability for the stepped spillways. By introducing an air-water two-phase flow model, this paper used k-ε turbulence model to calculate the characteristic variables of free-surface aeration on stepped spillway. The calculated results fit with the experimental results well. It supports that the numerical modeling method is reasonable and offers firm foundation on calculating re-aeration ability of stepped spillways. The simulation approach can provide a possible optimization tool for designing stepped spillways of more efficient aeration capability. |
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| Keywords: | stepped spillway two-phase flow turbulence modeling numerical simulation water re-aeration |
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