Hydrotransport of river sediments in hydroelelators
Аннотация
Abstract The article considers the hydrotransport of river sediment in a cylindrical pipeline. To describe the nature of hydraulic phenomena, experiments were carried out for single-phase and two-phase flows. Based on the results of the experiments, the main hydraulic parameters of the suction pipeline of the hydraulic elevator were determined during hydrotransport of river sediment. Based on the processing of available data, as well as data from specially designed experiments, the dependences of the flow coefficient at the expiration of the slurry flow from the hydraulic elevator pipeline on the Reynolds number are valid, which are valid for certain limits of the change in Reynolds numbers. The design parameters of the hydraulic elevator are substantiated, calculation formulas are given for determining the characteristics of a hydraulic mixture consisting of a solid particle and a carrier fluid. The methodology for calculating the concentration distribution and the method for determining the bottom concentration are given. A calculation formula is proposed for determining the flow rate and flow rate of a hydraulic elevator slurry. As a result of the analysis of these experiments, the dependences of the concentration of solid particles on the relative pressure in the hydraulic elevator are established.