明流泄洪洞中掺气水流断面平均流速的试验研究(黄小琴; 刘善均; 汤君; 岳超)

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T&l&T+[ _@P0明流泄洪洞中掺气水流断面平均流速的试验研究

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7S1PC)jt0【作者】黄小琴; 刘善均; 汤君; 岳超 【作者单位】四川大学水力学与山区河流开发保护国家重点实验室水利论文#CR'F#fl*M0ft

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G,FR w)?"G0【论文摘要】 结合明流泄洪洞掺气水流断面平均流速的试验成果,对高速水流掺气断面平均流速进行分析.通过恒定非均匀渐变流水面线计算公式得出未掺气明流泄洪洞水流的断面平均流速,并与试验实测掺气断面平均流速进行对比分析,最终得出水流掺气断面平均流速与未掺气时断面平均流速基本相等。总结原因主要是由于掺气水流中摩擦阻力和紊动耗散增加所引起的减速效应和掺气后水汽两相流的减阻增速效应相互抵消导致的。试验结论同样适用于明渠掺气水流,对指导工程实践有重要意义。水利论文K@G2B _9p3|!u

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【英文论文摘要】 With the testing results of the cross-sectional mean velocity of aerated flow in spillway tunnel,the velocity of aerated flow in high speed flow is analyzed.The velocity of the un-aerated flow is obtained by using the formula of the gradually varied steady flow and compares with the fact data,as a result,the velocity of the aerated flow approximatively comes up to the un-aerated flow's, which primarily due to the result that the decrease of the velocity as a result of friction and turbulent dissipation counteracts with the increase of the velocity for the two-phase flow,water phase and air phase.The results are the same with the aerated channel flow and have important meaning to practice.水利论文U0Y*?)wjZ)L`.O

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【论文关键词】 掺气水流; 明流泄洪洞; 断面平均流速
)vEBJv&]0【英文论文关键词】 aerated flow; spillway tunnel; cross-sectional mean velocity

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TAG: 断面 流速 泄洪洞 黄小琴 刘善均
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