Analytical and experimental assessment of screw centrifugal pump at improving its design

Purpose. Development of analytical and experimental assessment screw centrifugal type pump at a design stage, which permits defining more precisely its power cavitation characteristics. Methodology. To achieve the above-mentioned purpose, technique that includes following possibilities was developed: make list changes increase efficiency existing pump; quickly with high precision to estimate influence certain constructive and/or regime on without difficult flow calculations; determine need develop new pump, if all did not give positive result; properties calculate dispersion during hydraulic tests modified pump. Findings. During research, an determining in change operating mode developed. The developed determines how anti-cavitation properties. above mentioned also allows calculating result. use presented calculation technique, estimating precisely. increasing accuracy characteristics low-flow high-speed Originality. empirical dependences were obtained permit Practical value. stage Due this, it is possible reduce time for development tests.