掺气坎σ值对阶梯式溢洪道的性能影响研究
掺气坎σ值对阶梯式溢洪道的性能影响研究
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LI, Xiaochao , QIAO Chaoya , XIE Minping , XIAO Guanglei , QIN Rong and ZHANG, Hao
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Xinxiang City: Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage
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Xinxiang City: Chinese Academy of Agricultural Sciences (CAAS) Farmland Irrigation Research Institute Editorial Office of Journal of Irrigation and Drainage
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【目的】进一步探索掺气坎对阶梯溢洪道的水力性能影响研究。【方法】提出了高距比σ值，并通过数值模拟，针对σ值取1/3、1/2、2/3下，l分别取0.6、0.9、1.2 m的9种阶梯溢洪道方案进行了模拟，对各方案下阶梯溢洪道的水面线、速度矢量、掺气浓度、消能率进行了分析。【结果】发现掺气坎σ值对阶梯溢洪道性能有显著影响，掺气坎位置越靠近下游，阶梯溢洪道消能率越高且越稳定，受σ值的影响越小；σ值越小，掺气坎前空腔越多；σ值越大，掺气坎后空腔越多；掺气坎后空腔有利于提升台阶竖直面水流掺气浓度；掺气坎位置越靠近下游，掺气浓度越高；掺气坎越高，掺气浓度越高。【结论】通过对掺气坎不同σ值方案下的阶梯溢洪道性能分析，结合数值模拟结果，发现掺气坎在同一σ值下，位置越靠近下游，水流流态越平顺、掺气效果越稳定、消...
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掺气坎σ值对阶梯式溢洪道的性能影响研究
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TN_cdi_wanfang_journals_ggps202307017
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https://devfeature-collection.sl.nsw.gov.au/record/TN_cdi_wanfang_journals_ggps202307017
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1672-3317
DOI
10.13522/j.cnki.ggps.2022471
