联合泄洪下跌坎消力池底板脉动压强试验研究  

Experimental study on fluctuating pressure on bottom slab of stilling basin with falling-sill for joint-flood discharge

作　　者：董天松[1,2] 杨敏[1] 李会平[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 [2]长春工程学院,吉林长春130012

出　　处：《水利水电技术》2015年第9期95-99,共5页Water Resources and Hydropower Engineering

基　　金：国家自然科学基金项目(51179119);国家自然科学基金创新研究群体科学基(51021004)

摘　　要：基于某工程模型试验,对跌坎底流消能工消力池在表孔和中孔不同运用方式下脉动压强大小及分布特性进行研究。试验结果表明:开孔方式不同对底板脉动压强影响差别很大,首先脉动压强峰值在底板所处位置表现各不相同,其次脉动压强系数沿底板分布表现为表、中孔联合泄洪要比表孔或中孔单独泄洪明显减小,说明在同等运行条件下采用表孔和中孔联合泄洪更有助于降低消力池底板脉动压强,对底板安全运行有利。Based on the model test made for a project,the range of the fluctuating pressure and its distribution characteristics in the stilling basin with falling-sill bottom-flow dissipator under various operation modes of the surface outlet and intermediate outlet are studied herein. The result of the experimental study shows that the difference among the impacts from different opening modes of the outlets on the fluctuating pressure on the bottom slab is quite large; i. e. firstly,the locations of the peak fluctuating pressures on the bottom slab are different from each other; secondly,the fluctuating pressure coefficient distributed along the bottom slab presents that it is obviously reduced when the joint-operation of both the surface outlet and the intermediate outlet,if compared with the independent operation of flood discharge of one of them. It is indicated that the adoption of the mode of the jointflood discharge of both the surface outlet and the intermediate outlet is more helpful to lower the fluctuating pressure on the bottom slab of the stilling basin,and then is favorable for the safe operation of the bottom slab as well.

关 键 词：水利水电工程 跌坎底流消能 脉动压强 联合泄洪 模型试验 

分 类 号：TV653.1[水利工程—水利水电工程]