摘要
采用水力学试验的方法，测量了弗劳德数为3．08～5．42时，跌坎型底流消能工在不同流量、跌坎深度以及入射角度下，附壁射流区及其附近水域的掺气浓度值，通过对比分析，得到入池流量、跌坎深度以及入射角度对该区域掺气浓度沿程分布的影响规律。试验结果表明：在本试验条件下，当入射角度、跌坎深度一定时，该区域掺气浓度随入池流量的增大而增大；当流量一定、单一改变跌坎深度或单一改变入射角度时，该区域掺气浓度值无明显变化；无论入池流量、跌坎深度、入射角度改变与否，该区域临底掺气浓度均沿程呈现出先增大后减小的规律，而其他水深断面的掺气浓度则沿水流方向呈沿程衰减的规律。
This article was based on hydraulic experiment,air concentration of wall jet region and the nearby waters of bottom flow energy dissipater with step-down floor was measured at Froud number=3. 08-5. 42 under different flow,the depth of the falling-sill and incident angle. The results which were drawn through the comparison analysis of the different hydraulic conditions show that：under the same incident angle and depth of the falling-sill,the higher flow,the higher air concentration is;when the flow is constant,a single change in depth of falling-sill or incident angle,air concentration doesn’t change obviously in this area. No matter the flow,depth of falling-sill and incident angle changes or not,air concentration of the bottom of stilling basin increases at first and then decreases,while the other attenuates along the flow.
出处
《人民黄河》
CAS
北大核心
2014年第8期106-108,共3页
Yellow River
基金
国家自然科学基金资助项目(51169008)
关键词
跌坎型底流消能工
掺气浓度
流量
跌坎深度
入射角度
energy dissipater with step-down floor
air concentration
flow
depth of the falling-sill
incident angle
