Two hydraulic losses take effect at the junction point of three cylindrical conduits. These two quantities are considered to be functions of the three signed flow rates and two geometrical parameters: the cross-sectional area ratio and the angle between the main conduit and branch tube. A new design of experiment is developed for exploring the parameter space with continuous response surfaces, which cover both dividing and combining flow regimes with a general trigonometric formula. The loss coefficients are determined by using a steady-state, single-phase, three-dimensional (3D) computational fluid dynamics (CFD) model. To help the analytical treatment, a new reference velocity formulation is introduced. The new loss coefficient formula is validated against known empirical correlations for different junction types and flow directions. The obtained continuous solution promotes the applicability of the resistance model in hydraulic network models.
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April 2018
Research-Article
Junction Losses for Arbitrary Flow Directions
András Tomor,
András Tomor
Department of Fluid Mechanics,
Faculty of Mechanical Engineering,
Budapest University of
Technology and Economics,
Bertalan Lajos Street 4-6,
Budapest H-1111, Hungary
e-mail: tomor@ara.bme.hu
Faculty of Mechanical Engineering,
Budapest University of
Technology and Economics,
Bertalan Lajos Street 4-6,
Budapest H-1111, Hungary
e-mail: tomor@ara.bme.hu
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Gergely Kristóf
Gergely Kristóf
Department of Fluid Mechanics,
Faculty of Mechanical Engineering,
Budapest University of
Technology and Economics,
Budapest H-1111, Hungary
e-mail: kristof@ara.bme.hu
Faculty of Mechanical Engineering,
Budapest University of
Technology and Economics,
Bertalan Lajos Street 4-6
,Budapest H-1111, Hungary
e-mail: kristof@ara.bme.hu
Search for other works by this author on:
András Tomor
Department of Fluid Mechanics,
Faculty of Mechanical Engineering,
Budapest University of
Technology and Economics,
Bertalan Lajos Street 4-6,
Budapest H-1111, Hungary
e-mail: tomor@ara.bme.hu
Faculty of Mechanical Engineering,
Budapest University of
Technology and Economics,
Bertalan Lajos Street 4-6,
Budapest H-1111, Hungary
e-mail: tomor@ara.bme.hu
Gergely Kristóf
Department of Fluid Mechanics,
Faculty of Mechanical Engineering,
Budapest University of
Technology and Economics,
Budapest H-1111, Hungary
e-mail: kristof@ara.bme.hu
Faculty of Mechanical Engineering,
Budapest University of
Technology and Economics,
Bertalan Lajos Street 4-6
,Budapest H-1111, Hungary
e-mail: kristof@ara.bme.hu
1Corresponding author.
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received April 26, 2017; final manuscript received October 16, 2017; published online December 4, 2017. Assoc. Editor: Kwang-Yong Kim.
J. Fluids Eng. Apr 2018, 140(4): 041104 (13 pages)
Published Online: December 4, 2017
Article history
Received:
April 26, 2017
Revised:
October 16, 2017
Citation
Tomor, A., and Kristóf, G. (December 4, 2017). "Junction Losses for Arbitrary Flow Directions." ASME. J. Fluids Eng. April 2018; 140(4): 041104. https://doi.org/10.1115/1.4038395
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