Abstract

The article deals with problem solving, determining the potential throughput of pressure pipelines of a closed irrigation network. A fundamentally new method of calculating the regularity of velocity distribution in round pipes was derived, on the basis of which a new formula was obtained for determining the flow resistance in pipes, which makes it possible to reliably determine the throughput capacity of pipelines in a closed irrigation network. Consequently, in the proposed equation (16) and resulting from it by expressions using formula (23), the existing drawbacks are completely absent, which indicates a more correct solution of the problem in this case. It should be recognized that the basic analysis conducted here is of interest in comparing the results of the calculation using formulas (20) and (23), since the carrying capacity of the pipeline largely depends on the value of the coefficient λ. For this, when calculating, we considered pipes of two diameters d=100 mm and d = 1000 mm. Note that pipes with a diameter of d=100 mm are most often used when installing progressive irrigation techniques. Calculation for pipes with d =1000 mm was considered for comparative evaluation of λ values.