摘要
基于平底突扩水跃形成机制,认为突扩断面回流区平均水深取决于突扩断面上游渠道的能量水头及断面突扩比等。假定突扩断面回流区平均水深等于突扩断面上游渠道能量水头乘以修正系数,通过实测资料分析,建立了修正系数与上游渠道弗劳德数以及断面突扩比的关系式,并将突扩断面回流区平均水深代入平底突扩水跃共轭水深一般方程,得到了跃后水深计算公式。经实测资料验证,本文跃后水深计算公式计算结果与实测资料符合良好,误差较小。
The hydraulic jump in rectangular,horizontal and abrupt enlargements channels was analyzed. Based on the investigation of hydraulic jumps formation mechanism through both experimental and analytical methods in abrupt enlargements channels,this paper found out that the channel side wall average depth of the re-circulation zone at the sudden enlargement channel cross section was related to the inflow energy head and the ratio of upstream and downstream channel widths,as well as assumed that the average depth equaled the product of the inflow energy head times the correction coefficient,which was presented in terms of the inflow Froude number and the ratio of upstream and downstream channel widths according to some observation data presented. Then the sequent depths formula was acquired by plugging the average water depth into the equation for the sequent depths ratio. And it could be found that the sequent depths calculated by the formula were in good agreement with the other observation data presented,with higher calculation accuracy than the presented formula.
作者
高远
张根广
吴彰松
李林林
杨耀天
GAO Yuan;ZHANG Genguang;WU Zhangsong;LI Linlin;YANG Yaotian(College of Water Resources and Architectural Engineering,Northwest A ＆ F University,Yangling 712100,China)
出处
《人民黄河》
CAS
北大核心
2018年第8期127-131,136,共6页
Yellow River
基金
国家自然科学基金资助项目(51279170)
关键词
突扩水跃
突扩断面
回流区平均水深
共轭水深比
hydraulic jump
abrupt enlargements channels
average depth of the re-circulation zone
conjugate water depth ratio
