ВИЗНАЧЕННЯ ХАРАКТЕРИСТИК РОЗПОДІЛЬЧИХ ДРЕНАЖНИХ ТРУБОПРОВОДІВ ПРИ ПРОПУСКУ ТРАНЗИТНОЇ ВИТРАТИ

Abstract

Simple and convenient dependences for calculating basic hydraulic and design characteristics of horizontal drainage pipelines operating in the presence of transit flow, in which the fluid distribution along the path occurs in the filtration mode, are proposed on the basis of the analysis of a system of differential equations that describe the fluid motion in such pipes. The solutions are based on the assumption that the member is neglected, which takes into account the effect of the flow variation along the pass. The concept of a fictitious infinitely long distribution drainage pipeline or a pipeline with an infinitely large amount of permeation of the pipe walls is used in the analysis. It is assumed that the actual flow at the beginning of this
pipelines is replaced by a conditional flow, which is distributed at the fictitious initial section of the pipeline. The flow in the initial section of the fictitious pipes is assumed to be zero. The introduced assumptions allow to use formulas for calculation of the mentioned pipelines with a certain approximation which are applied at calculation of pipelines operation without transit. These dependences allow to calculate the effect of transit flow on the hydraulic characteristics of the distribution drainage pipelines.