跌坎消力池临底流速试验研究  

Testing Study on Underflow Velocity of Stilling Basin with Drop Sill

作　　者：杨敏[1] 李会平[1] 李树宁[1] 董天松[1] 

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300072

出　　处：《天津大学学报》2013年第4期342-346,共5页Journal of Tianjin University(Science and Technology)

基　　金：国家自然科学基金资助项目(51179119);国家自然科学基金创新研究群体科学基金资助项目(51021004);水利部公益性行业科研专项基金资助项目(200901081)

摘　　要：基于模型试验结果,分析比较了跌坎消力池与传统消力池的临底流速分布以及最大临底流速分布特性.分析结果表明:跌坎消力池临底流速分布为谷峰型;在其他条件一定时,随着跌坎高度增加,消力池最大临底流速减小;随着入池能量的增大,射流能量增大,到达底板的最大临底流速也相应增大;仅改变跌坎消力池的入池角时,随着入池角的增大,跌坎消力池最大临底流速相应增大.研究结果可为跌坎消力池的设计提供参考和指导.Based on the model test results, the distribution characteristic of underflow velocity and the maximum underflow velocity were compared between the stilling basin with drop sill and the routine stilling basin. The analysis results show that the underflow velocity distribution pattern in the stilling basin with drop sill belongs to valley-peak model. The influence of drop sill height, inlet energy and inlet angel on the maximum underflow velocity was inves- tigated. Under other given conditions, the maximum underflow velocity in the stilling basin with drop sill increases with the increase of such indexes as drop sill height, inlet energy and inlet angel. The maximum underflow velocity formula was obtained as drop sill height or inlet energy changed. The results can provide a reference and guidance for designing the stilling basin with drop sill.

关 键 词：水力学 跌坎消力池 模型试验 临底流速 流态 

分 类 号：TV131[水利工程—水力学及河流动力学]