Injection flow regulators without diffuser output areas

Abstract

The paper presents the results of theoretical and experimental substantiation of the use of injection flow regulators with a new form of flow part. A distinctive feature of the structures is a complete change in the end section of the regulator. The output cross-section of the transit water outlet is placed in the downstream and has a diaphragm with edges cut down the stream and partial lateral flow clamping. There is no diffuser at the end section, the output of the flow into the volume of the downstream takes place directly from the prismatic mixing chamber, which has a constant area. A method for theoretical calculation of hydraulic parameters of injection flow regulators with a diaphragm without diffuser output areas has been developed. The validity of the use of theoretical dependencies to determine the hydraulic characteristics of the structure and the effectiveness of the proposed changes in the form of the flowing part have been proven. Injection regulators without diffusers are capable of taking up to 30% of the excess from the downstream flow and ensuring its circulation between the outlet section of the outlet and the mixing chamber. The increase in the regulating capacity compared to existing designs of injection water outlets is due to the optimization of the diaphragm design.