Расходные характеристики инжекционных водовыпусков-регуляторов

Abstract

In cases where the supply of energy sources to hydraulic structures located on irrigation canals is economically unjustified, hydraulic automation means are widely used in Russia and abroad. The purpose of the research is to derive design dependencies to determine the flow rate of the injected and injected flows, taking into account hydraulic losses within the flow path of the structure, to construct the flow characteristic of the regulator with a nozzle and an output section of a constant area with its subsequent verification by the data of the hydraulic experiment. Injection flow regulators have several modifications: with a diffuser outlet section without restricting the outlet pipe with a nozzle, with a nozzle and diffuser, with a nozzle and an outlet section of a constant area. For regulators with a nozzle, dependences for hydraulic calculations have now been obtained, which can be considered conditionally “ideal”, since they do not take into account a number of local resistances and frictional resistances along the length that arise when flows merge with subsequent movement in the mixing chamber. As a result of the research, the authors for the first time obtained calculated dependencies for determining the flow rate of the injected and injected flows, taking into account hydraulic losses within the flow path of the structure, and constructed the flow characteristic of a regulator with a nozzle and an outlet section of a constant area. The flow characteristic is verified using available hydraulic experiment data. An analysis of the shape of the flow characteristics of the injection regulator was carried out by comparison with the generalized characteristics of hydraulic jet pumps. The practical significance of the research lies in the possibility of using the dimensionless characteristics of the injection water outlet to link it to specific operating conditions, as is customary when selecting pumps. To determine the flow rates in the regulator, a computer program has been registered.