Гидравлический расчет трубопровода с учетом длин влияния местных сопротивлений и их интерференции

Abstract

The design and calculation of pipelines taking into account the mutual influence of local resistances is an urgent task in the hydraulics of pressure flows. The analysis and results of the hydraulic calculation of the Valtec metal-polymer pipeline are given, taking into account the lengths of the influence of local resistances of their mutual influence (interference). Tabular data on the lengths of influence of local resistances, coefficients of mutual influence used in the developed program of the Delhi (Object Pascal) environment are given. A graph of the dependence of specific pressure losses per 1 meter of pipeline length on the flow rate for the Valtec pipeline with an equivalent roughness of Δe/ d = 0.007 mm, obtained experimentally and data for a similar pipeline according to the reference data tables with an equivalent roughness of Δe / d = 0.01 mm, is presented. The results of the calculations and the interface of the Delphi 7 environment application program with the data in a tabular form for the hydraulic calculation of the total pressure losses in pipelines are shown, taking into account reference and experimental values of coefficients of local resistances. The data of the results of the hydraulic calculation of the total head losses, taking into account the specifi c linear pressure loss per 1 meter of the pipeline length without local resistances, are given to determine the head losses by length. The developed program can be used in the design, layout and hydraulic calculation of metal-polymer pipelines with specifi ed parameters.