Open AccessANALYSIS OF THE RESULTS OF PERFORATED DRAINAGE PIPELINES CALCULATION IN THE PRESENCE OF TRANSIT FLOW RATE
Author(s) -
Andriy Kravchuk,
Oleksandr Kravchuk
Publication year - 2021
Publication title -
problemi vodopostačannâ, vodovìdvedennâ ta gìdravlìki
Language(s) - English
Resource type - Journals
ISSN - 2524-0021
DOI - 10.32347/2524-0021.2021.37.42-46
Subject(s) - pipeline transport , drainage , volumetric flow rate , dimensionless quantity , mechanics , flow (mathematics) , transit time , pipeline (software) , variable (mathematics) , error analysis , nominal pipe size , mathematics , engineering , mathematical analysis , materials science , physics , mechanical engineering , ecology , transport engineering , composite material , biology
A method of calculating the error that occurs when determining the flow rate in the final section of the pressure perforated drainage pipeline when it passes transit flow rate, based on the analysis of differential equations describing the fluid motion with variable flow rate in such pipelines is proposed in the paper. The analysis is presented in dimensionless form. The impact of transit flow on the main flow is estimated using the values of the drainage pipeline resistance coefficient ζl and the generalized parameter of the perforated drain A, which takes into account its constructive and filtration characteristics. The obtained calculation formulas are quite simple and easy to use. The proposed method allows to perform calculations of drainage pipelines that operate in the presence of transit flow rate, according to the method of these pipes calculation that dispose drain water without passing transit. Herewith, the possible error, which includes in the calculation results, determines. To illustrate the obtained dependences, the corresponding graphs are given in the paper. The results of the analysis allow to determine the limits within which a simplified method of calculating these pipes can be used and the error, that occurs, can be estimated