Studies of flow characteristics in pressure pipelines of irrigation systems with discrete fluid sampling
https://doi.org/10.26897/1997-6011-2022-5-100-104
Abstract
The purpose of the experiments is to study the characteristics of the flow in the pressure pipelines of irrigation systems with discrete liquid selection. The investigations have confirmed a slight increase in the head along the perforated pipeline during withdrawal of the fluid, which is explained by the transition of kinetic energy to potential energy. Theoretical studies of the fluid flow with a flow rate variable along the length of the pipeline made it possible to obtain dependences that describe the characteristics of the flow in the presence of both uniform and non-uniform installation of drains along the pipeline and pressure losses, taking into account the discreteness parameter, which takes into account the number of outlets per a unit of the length, i.e. frequency of setting. To clarify the coefficient of the flow disconnection, the studies were carried out, the results of which showed the independence of the ratio of the speeds of the main flow and the flow rate of the jet from the diameter of the outlet holes. The coefficient of disconnection of the flow is in the range of values from 0.66 to 0.87. The results of experimental studies allow us to conclude that the parameter of flow discreteness decreases with an increase in the number of drains. The value of the value of head losses in discrete withdrawal was determined by the value of head losses with uniform withdrawal of the fluid flow, taking into account the discreteness parameter. The obtained calculated values are well confirmed by the results of experimental studies.
About the Authors
L. A. Zhuravleva
Russian State Agrarian University – Moscow MAA named after C.A. Timiryazev
Russian Federation
Russian Federation
doctor of technical sciences, associate professor,
127434, Moscow, Timiryazevskaya St., 49
I. A. Popkov
LLC Ruskhimbio
Russian Federation
Russian Federation
candidate of economic sciences, Vice-rector for the introduction of innovative Technologies,
121170, Moscow, General Yermolov str., 10/6
A. Aldiab
Russian State Agrarian University – Moscow MAA named after C.A. Timiryazev
Russian Federation
Russian Federation
post graduate student,
127434, Moscow, Timiryazevskaya St., 49
B. Heirbeik
Russian State Agrarian University – Moscow MAA named after C.A. Timiryazev
Russian Federation
Russian Federation
post graduate student,
127434, Moscow, Timiryazevskaya St., 49
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Review
For citations:
Zhuravleva L.A., Popkov I.A., Aldiab A., Heirbeik B. Studies of flow characteristics in pressure pipelines of irrigation systems with discrete fluid sampling. Prirodoobustrojstvo. 2022;(5):100-104. (In Russ.) https://doi.org/10.26897/1997-6011-2022-5-100-104
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