Comparison of the Hydraulic Characteristics of Injection Regulators with Different Forms of the Outlet Sections

The objective of this study was to upgrade the form of the flow part of the injection regulator to increase the percentage of circulating flow, representing a surplus water supply. The optimization was based on the recommendations adopted in the theory of injection pumps related to the shape and area of the nozzle located in the outlet section of the tubular part; length and diameter of the mixing chamber; and presence or absence of a diffuser outlet section. The operation of two models of injection regulators was successively studied using a mirror hydraulic flume. The models had the same water outlet pipes, but different forms of the outlet sections. The experimental data confirmed the validity of the previously obtained theoretical dependences, as well as the possibility of using regulators with nozzles without diffusers, and the significance of the nozzle and mixing chamber design in terms of increasing the injected flow rate.