Inicio  /  Water  /  Vol: 9 Núm: 10 Par: 0 (2017)  /  Artículo
ARTÍCULO
TITULO

Energy Dissipation in Circular Drop Manholes under Different Outflow Conditions

Feidong Zheng    
Yun Li    
Jianjun Zhao    
Jianfeng An    

Resumen

Circular drop manholes have been an important device for energy dissipation and reduction of flow velocities in urban drainage networks. The energy dissipation in a drop manhole depends on the manhole flow patterns, the outflow regimes in the exit pipe and the downstream operation conditions, and is closely related to the hydraulic and geometric parameters of the manhole. In the present work, the energy dissipation of a drop manhole with three drop heights was experimentally investigated under free outflow conditions and constrained outflow conditions. The results demonstrate that the local head loss coefficient is solely related to the dimensionless drop parameter for free surface outflow without a downstream backwater effect, whereas it depends on the dimensionless submerge parameter for constrained outflow. Moreover, it is concluded that the energy dissipation is largely promoted when outlet choking occurs.

 Artículos similares

       
 
Bin Chi, Yuhu Quan, Fenglai Wang and Xu Yang    
Prestressing technology is an effective way to improve the seismic performance of masonry structures such as concrete masonry wall. Therefore, bonded prestressing technology applied to integrated concrete masonry wall (ICMW) was proposed in this study, a... ver más
Revista: Buildings

 
Huayang Yu, Yihao Deng, Guansen Deng and Niya Dong    
Fatigue failure in asphalt pavements, caused by continuous loading, primarily occurs at the interface between the asphalt binder and the aggregate (adhesive failure) or within the asphalt binder itself (cohesive failure). This study conducted variable st... ver más
Revista: Buildings

 
Prashanth Barla, Hemalatha Shivarama, Ganesan Deepa and Ujjwal Ujjwal    
Hybrid magnetic tunnel junction/complementary metal oxide semiconductor (MTJ/CMOS) circuits based on in-memory-computation (IMC) architecture is considered as the next-generation candidate for the digital integrated circuits. However, the energy consumpt... ver más

 
Yan Gao, Zixin Guo and Quan Yuan    
The mechanical response and deformation characteristics in calcareous sand foundations during pile driving and setup were studied using model tests combined with the technical methods of tactile pressure sensors and close-range photogrammetry. Different ... ver más

 
Miao Li, Hao Li and Yang Wen    
A new type of spherical node was used to design a laboratory-scale prototype of a six-leg lattice of steel tubes and concrete for application as a wind turbine tower. Repeated load tests were performed on the prototype tower for several weeks to evaluate... ver más
Revista: Buildings