Investigation of the influence of the gas pipeline tee geometry on hydraulic energy loss of gas pipeline systems
DOI:
https://doi.org/10.15587/1729-4061.2020.192828Keywords:
hydrodynamic pressure, local resistance coefficient, pressure loss, bending radius, turbulent flow, Navier-Stokes equationsAbstract
CFD simulation investigated turbulent flows in equal gas pipeline tees, in which the gas flow completely moves from the main line to the branch. The study was performed for tees of different geometry – stamped with different bending radii of the transition from the branch to the main line and weld, where the main line and branch connection is made at right angles. The outer diameter of the tees varied from 219 mm to 1,420 mm, the bending radius of the transition from the branch to the main line from the minimum permissible to the maximum possible, the pressure in the gas pipeline at the tee location from 3 MPa to 7 MPa.
The mathematical model is based on the solution of the Navier-Stokes and energy transfer equations closed by a two-parameter high-Reynolds k – ε Launder-Sharma turbulence model. To describe the processes occurring at the wall, the wall function was used.
It was found that the bending of the transition from the branch to the main line, the increase in the bending radius lead to a decrease in the intensity of flow separation at the bending point and a decrease in turbulence kinetic energy in recirculation areas. The velocity field of the gas flow after it moves from the main line to the branch becomes more uniform. All this greatly affects the magnitude of hydraulic energy loss of the gas flow in the tees. In this case, the greatest energy losses were observed in the tees located at the lowest pressure points in the gas pipeline system. An analysis of the results showed that if the ratio of the bending radius of the main line and branch connection to the outer diameter is more than 0.25, then the influence of such a tee on the energy loss of the gas pipeline system is minimal. Local resistance coefficients of equal gas pipeline tees are calculated and the resulting equation for their calculation will be useful for specialists designing gas pipeline systemsReferences
- Idel'chik, I. E. (2012). Spravochnik po gidravlicheskim soprotivleniyam. Mosсow, 466.
- Nimadge, G., Chopade, S. (2017). CFD analysis of flow through T-junction of pipe. International Research Journal of Engineering and Technology, 4 (2), 906–911.
- Abdulwahhab, M., Injeti, N., Dakhil, S. (2013). Numerical prediction of pressure loss of fluid in a T-junction. International Journal of Energy and Environment, 4 (2), 253–264.
- Abdulwahhab, M., Injeti, N., Dakhil, S. (2012). CFD simulations and flow analysis through a T-junction pipe. International Journal of Engineering Science and Technology, 4, 3392–3407.
- Sambandam, M. T., Madlool, N. A., Saidur, R., Devaraj, D., Rajakarunakaran, S. (2017). Investigation of energy saving potentials in T-junction and elbow in compressed air systems. Energy Efficiency, 10 (5), 1099–1113. doi: https://doi.org/10.1007/s12053-016-9493-0
- Li, X., Wang, S. (2013). Flow field and pressure loss analysis of junction and its structure optimization of aircraft hydraulic pipe system. Chinese Journal of Aeronautics, 26 (4), 1080–1092. doi: https://doi.org/10.1016/j.cja.2013.04.004
- Doroshenko, Ya. V., Marko, T. I., Doroshenko, Yu. I. (2016). Doslidzhennia dynamiky rukhu hazu fasonnymy elementamy obviazky kompresornoi stantsiyi. Naukovyi visnyk, 1 (40), 57–71.
- SNiP 2.05.06-85*. Magistral'nye truboprovody (2005). Moscow: FGUP TSPP, 60.
- Squires, K. D., Eaton, J. K. (1990). Particle response and turbulence modification in isotropic turbulence. Physics of Fluids A: Fluid Dynamics, 2 (7), 1191–1203. doi: https://doi.org/10.1063/1.857620
- TU U 27.2-05747991-001-2004. Detali ziednuvalni i zbirni odynytsi mahistralnykh i promyslovykh truboprovodiv na Pp do 10 MPa (100 khs/sm 2) (2004). Sumy: VAT “SMNO im. Frunze”, 98.
- GOST 102-61-81. Detali magistral'nyh truboprovodov stal'nye privarnye na Ru do 10,0 MPa (100 kgs/sm2). Troyniki svarnye s usilivayushchimi nakladkami. Razmery (1981). Moscow: Ministerstvo stroitel'stva predpriyatiy neftyanoy i gazovoy promyshlennosti, 32.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2020 Yaroslav Doroshenko, Ihor Rybitskyi
This work is licensed under a Creative Commons Attribution 4.0 International License.
The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.
A license agreement is a document in which the author warrants that he/she owns all copyright for the work (manuscript, article, etc.).
The authors, signing the License Agreement with TECHNOLOGY CENTER PC, have all rights to the further use of their work, provided that they link to our edition in which the work was published.
According to the terms of the License Agreement, the Publisher TECHNOLOGY CENTER PC does not take away your copyrights and receives permission from the authors to use and dissemination of the publication through the world's scientific resources (own electronic resources, scientometric databases, repositories, libraries, etc.).
In the absence of a signed License Agreement or in the absence of this agreement of identifiers allowing to identify the identity of the author, the editors have no right to work with the manuscript.
It is important to remember that there is another type of agreement between authors and publishers – when copyright is transferred from the authors to the publisher. In this case, the authors lose ownership of their work and may not use it in any way.
