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张红红, 牧振伟, 李凡琦, 贾萍阳.糙条消能工对弯道水流动能调整试验研究水资源与水工程学报[J].,2020,31(3):162-168
糙条消能工对弯道水流动能调整试验研究
Experimental study on the flow energy adjustment with rough strip energy dissipators in a curved channel
  
DOI:10.11705/j.issn.1672-643X.2020.03.23
中文关键词:  糙条  弯道水流  加糙水位变化率  水面横比降  动能计算  动能调整系数
英文关键词:rough strips  bend water flow  water level change rate with rough strips  transverse slope of water surface  kinetic energy calculation  kinetic energy adjustment coefficient
基金项目:国家自然科学基金项目(51769037、51469031); 新疆维吾尔自治区高校科研计划创新团队项目(XJEDU2017T004)
作者单位
张红红, 牧振伟, 李凡琦, 贾萍阳 (新疆农业大学 水利与土木工程学院 新疆 乌鲁木齐 830052) 
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中文摘要:
      糙条消能工是一种新型消能工程措施。结合新疆“635”溢洪道整治工程,采用糙条对弯道水流进行消能辅助,通过改变糙条的布置型式,设置6种不同工况,对加糙水位变化率、水面线、横断面均匀度、水面横比降、断面流速分布、下游水流恢复长度、断面动能计算和动能调整系数等评价指标进行了分析。研究结果表明:有糙条工况能够增大加糙水位变化率,弯顶断面加糙水位变化率的变化不同于其他弯段断面;糙条高度的增大和条距的减小对弯道水流及下游出口水流有良好的改善效果;通过对弯道段典型断面的动能计算,得出糙条的设置可大幅度削减水流的动能,改变动能调整系数,进一步说明糙条消能工对弯道水流动能有很大的调整作用,突显了糙条消能工良好的消能辅助作用。
英文摘要:
      The application of rough strip energy dissipators is a new energy dissipation measure in engineering projects. In this study, the rough strips were installed to assist the energy dissipation in the curved channel of the “635” spillway remediation project in Xinjiang. By changing the layout of the rough strips, six different working conditions were set to analyze the water level change rate with the installment of rough strips, the surface line, the cross section uniformity, transverse slope of water surface, section velocity distribution, downstream water flow recovery length, section kinetic energy calculation and kinetic energy adjustment coefficient. The results showed that the installment of the rough strips could increase the water level change rate, and the change rate of the top section was different from that of the other sections of the bend in the curved channel. The increase of the height and the decrease of the interval spaces of the strips improved the flow regime in the bend and the downstream outlet. Through the calculation of the kinetic energy of the typical sections, we can see that the setting of the rough strips can greatly reduce the kinetic energy and change its adjustment coefficient. This indicates that the rough strip energy dissipators have a great adjustment effect on the flow energy, and performs well in assisting with energy dissipation of curved channels.
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