Evaluation of the impact of different head loss types on the collecting pipelines working character-istics

Автор(и)

  • Oleksandr Kravchuk Kyiv University of Construction and Architecture
  • Olga Kravchuk Національний транспортний університет http://orcid.org/0000-0003-2616-5455

DOI:

https://doi.org/10.32347/2524-0021.2020.34.19-24

Ключові слова:

short collecting perforated pipelines, long collecting perforated pipelines, variable fluid discharge, head, resistance coefficient, on-off time ratio

Анотація

The classification of collecting pipelines is elaborated on the basis of the solutions of the differential equation system, previously obtained by the authors, which describes the fluid motion with variable velocity along the path. It is based on the error value estimation, which is added into discharge calculations at the end of the collecting perforated pipeline while neglecting of head losses on hydraulic friction and losses which are associated with the flow variation effect. In accordance with the proposed classification all collecting pipelines are conditionally divided into: short, in which calculation head losses on hydraulic friction are neglected while the predetermined precision does not exceed; intermediate length pipelines, when it is necessary to take into account the head losses by length and for the discharge variation; long, when the head losses, associated with the discharge variation effect, can be ignored. Appropriate analytical dependencies and graphs are obtained.

Посилання

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Опубліковано

2020-12-16