К вопросу определения гидравлических сопротивлений тройников металлополимерных трубопроводов

Abstract

The purpose of the conducted studies is experimental determination of hydraulic resistances of asymmetrical equal-pass tees with α=90° angle in the metal-polymer pipeline, identification of dependencies of local resistance coefficients ζ on the ratio of flow rates of direct passage Q2 and flow rates of assembly hose Q3, their comparison with existing reference data and theoretical dependencies. The article presents the results of experiments and analysis to determine hydraulic resistances in the metal polymer pipeline, provides the method of theoretical determination of resistance coefficients in the metal polymer pipeline VALTEC ISO and the method of determining the values of local hydraulic resistances of an asymmetric equal-pass (supply) T-joint with an angle of α=90•°. The obtained empirical dependencies of the values of the local resistance coefficients of the ζ=f(Q2/Q3) in the asymmetric equal-pass tee with an angle of α=90° in the metal-polymer pipeline from the ratio of the separated flows Q2/Q3 to the branch upwards, to the passage in the straight tee and the division of flows atd ifferent internal diameters of the VALTEC ISO pipeline for the range of Reynolds numbers Re =1⋅104 ÷ 3,2 ⋅104 are presented. The obtained empirical relationships were compared with reference data on formulas and experimental data for standard tees with angle α = 90° and tees made of ductile iron on thread α = 90° when dividing liquid flows.