Abstract
The results of a comprehensive study of the operation of the downstream of three-span culverts of reclamation systems with a sufficiently deep but short stilling well when additional elements are installed on it that affect the flow are presented. The purpose of the research was to analyze the hydraulic and hydrodynamic parameters of the flow to substantiate the optimal dimensions of the damper and refine its design to obtain the greatest effect of extinguishing the excess energy of the flow and to improve the operation of the downstream with a uniform and uneven distribution of unit flow rates entering the well. An estimate is given of the hydrodynamic effect of the flow on individual elements of the damper at Froude numbers in the compressed section in the range of 20 … 120, Reynolds numbers (5 … 10) 104 and specifi c flow rates in the downstream of the models from 0.017 to 0.042 m2 /s. The data of a comparative analysis of the decrease in the hydrodynamic characteristics of the flow in the zone of operation of a deep stilling well and a conventional jump well are presented. The obtained picture of the distribution of the averaged and pulsating pressure components over the entire interface section made it possible to estimate the load on the fixing elements of the bottom of the well and the outlet channel and to assess their stability. It is recommended to make a deep stilling well with a slotted wall at the bottom, the ledge and apron for a length of at least three depths of the well should be made of monolithic reinforced concrete, and the rest should be reinforced with prefabricated elements. The developed recommendations for assessing the distribution of the averaged and pulsating pressure components over the entire interface section, for choosing the size and design of the elements of the downstream attachment section have made it possible to signifi cantly reduce the dimensions and reduce the cost of arranging the interface section while ensuring the reliability of the reclamation systems canals and the safety of their water-conducting hydraulic structures.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call