METHOD FOR STUDYING CAVITATION PHENOMENA IN TECHNOLOGICAL LIQUIDS AND A STAND FOR ITS IMPLEMENTATION Russian patent published in 2023 - IPC G01N11/00 G01N21/64 

FIELD: fluid hydrodynamics research.

SUBSTANCE: group of inventions is intended for cavitation effects research. The stand contains a pressure creation block (PCB) for the process fluid under study, a piping block (PB) and a cavitation detection block (CDB). The PCB contains a hydraulic pump (1) equipped with a frequency-controlled drive (2), and a hydraulic cylinder (3) with two cavities separated by a movable piston (4), one cavity (5) of which is configured to be filled with the studied process fluid (PF), and the second cavity (7) is made with the possibility of supplying the working medium of the hydraulic pump (1) into it through the line (8). The PB includes a section (8) and a pressure line (10), as well as a measuring line (ML) (11) and a drain pipe (12) hydraulically connected to a container (13) for draining the test liquid. ML (11) is equipped with a cavitator (CV) (14), made in form of a tapering channel. In the area K of CV (14) there is a CDB, which is made in form of a photomultiplier (15) with a reader (16), which makes it possible to register sono- and hydroluminescence phenomena in the visible radiation range that occur in the test liquid when it passes through the CV (14). According to the method, PF is poured into the right side of the hydraulic cylinder (3). With the help of a hydraulic pump (1) in the left cavity (7) of the hydraulic cylinder, pressure is created, which through the piston (4) acts on the PF in the cavity (5), which, in turn, is passed under pressure through the pressure section (10) of the pipeline, then through the measuring line (11) and through the CV (14). With the help of a photomultiplier (15) with a counting device (16) connected to it, the phenomena of sono- or hydroluminescence in the range of visible radiation are recorded in the test liquid passing under pressure through the CV (14).

EFFECT: enabling the study of cavitation phenomena that manifest themselves in process fluids that are not aggressive to metal surfaces with a wide range of physical and chemical properties, namely, with a viscosity of 1.3 to 950 mm²/s and a density of 0.82 to 1, 15 g/cm³, in a wide pressure range from 1 to 250 atm.

8 cl, 1 tbl, 1 dwg