STUDY OF LIQUID FLOW PROCESSES IN PIPELINE WITH CHANGING DIAMETER

Abstract

Background In order to increase the efficiency of hydrocarbon liquids transfer processes in systems for gathering, treatment and transporting oil and oil products in oil fields while maintaining high reliability, it is proposed to use pipelines with a periodically varying cross section. This work is devoted to the study of homogeneous incompressible fluid flow through a pipe consisting of confusor-diffuser elements of the Venturi type pipe. Aims and Objectives To define distributions in a pipe with periodically varying cross sections of local velocities, pressures, kinetic energy of turbulence, and energy dissipation rates based on the ( k -e)-turbulence model using the finite element method. Results The simplified engineering method of calculation allows determining the distribution of velocities, accelerations and pressures along a pipe with a periodically varying cross section, as well as the oscillation frequency with satisfactory accuracy. Hydraulic resistance and total energy losses in the pipe under consideration with a periodically varying cross section are slightly lower than in a straight cylindrical pipe of the same length and with a diameter equal to the diameter of the smaller neck, with other things being equal.