Abstract
Determination of the total energy in the suction pipeline of a four-component mixer of fertilizers and water in an experimental way, for the possibility of its use in various schemes of cropsirrigation has been performed. Materials and methods: The research was carried out at an operating pumping station LLC “Rassvet” Kuibyshevsky district of Rostov region on a specially made installation using calibrated control and measuring devices in accordance with GOST 24028-80 “Research tests”. The experimental results’ processing was carried out according to the recommendations of V.N. Voznesensky on the theory of experiment planning. The experiments were carried out in two stages, the first to determine the factors influencedegree: В1– mixer vacuum value, accepted values 0÷9 m, В2 – vacuum value in the suction pipe of a centrifugal pump, assumed values 0÷5 m, H1 – the head of the jet pump, taken within 0÷25 m, at full energy in the suction pipe of the mixerS (pressure + velocity head), which subsequently determined all the hydraulic parameters of the mixer suction line (pipe diameters, distance of mixture transportation, head loss in the suction pipeline. According to the first stageresults, the influencedegree of the factors on the criterion was determined - the mixer head is 66.37%, the mixer head mixer pipeline 26.32%, mixer vacuum 7.3% The second stage was carried out with the two most significant factors, the mixer head HIand vacuum in the suction pipe of the pump В2. Based on the results of the second group of experiments, an equation, the analysis of which made it possible to determine the value of the variationstudied intervals criterion was obtained.
Highlights
To identify possible values of the mixer feeds, the experiments at a pumping station LLC “Rassvet” using the theory of experiment planning were carried out [4] according to the scheme (Figure 8) for determining the potential energy as factors were used: В1(x1) is the amount of vacuum in the mixer housing, the accepted values 0 9m
To compare the experimental and calculated data for the dependence 2, the values of the criterion S were calculated and are shown in Figure 11, from which it can be seen that the highest potential energy value of 15.6 m was obtained at the maximum vacuum values in the mixer body (-8 mand 18 m) and medium vacuum in a centrifugal pump (-3 m)
Potential energy values S in the mixer suction pipeline according to the results of the second group of experiments with a stable vacuum value in the mixer body В1=-5 m
Summary
To identify possible values of the mixer feeds, the experiments at a pumping station LLC “Rassvet” using the theory of experiment planning were carried out [4] according to the scheme (Figure 8) for determining the potential energy (referred to the unit of weight and expressed in meters of pumped liquid - water) as factors were used: В1(x1) is the amount of vacuum in the mixer housing, the accepted values 0 9m .
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