3D Flow Modeling of the First Trifurcation Made in Nepal

Authors

  • R K Malik Structural Engineering
  • Paras Paudel Mechanical Engineering

DOI:

https://doi.org/10.3126/hn.v5i0.2493

Keywords:

Symmetrical Trifuraction, Trifurcation, Computational fl uid dynamics, Hydropower, Nepal

Abstract

The foremost objective of the study was to find out the most efficient profile of trifurcation in given constraints of pressure, velocity and layout of the overall geometry. The study was done for the 3.2 MW Madi Khola Hydropower Project of Gandaki Hydropower Development Co. Pvt. Ltd. The 3 Dimensional Flow modeling of the trifurcation was based on the application of Computational Fluid Dynamics (CFD).

The loss in the Trifurcation greatly depends upon its geometrical configuration. The research started with a general profi le and the flow pattern generated inside it was studied with the help of 3 Dimensional Flow modeling. The extent of vortex zone formation inside the trifurcation indicates the loss inside trifurcation. The profile of the trifurcation was hence changed to reduce the vortex formation as far as possible, till we get minimum possible loss. The profile under study should meet maximum flow efficiency under the physical constraints of fabrication. The flow efficient profile was then analyzed to capture the stress amplifi cation near junction. The reinforcing element in the form of steel T-section was added of different sectional values till the stress was within allowable limits under severe conditions.

Key words: Symmetrical Trifuraction; Trifurcation; Computational fluid dynamics; Hydropower; Nepal

DOI: 10.3126/hn.v5i0.2493

Hydro Nepal Vol. 5, July 2009 Page:56-61

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Author Biographies

R K Malik, Structural Engineering

R. K. Mallik completed his M.Sc. in Structural Engineering from IOE in 2005. He has worked for Radha Structure Engineering & Works and many consultancy as a Structural Engineer. These days he is involved as research engineer at NSET. He has started the fi nite element modeling for the analysis of the complex profi le of hydropower for the fi rst time in Nepal such as Bifurcation modeling for Heldung
Hydropower and Lower Piluwa Hydropower.
Besides other different researches in structural fi eld, he was the developer of the analysis and design methodology for the 3-Dimensional fl ow modeling in the trifurcation for Madi Khola small hydropower for the fi rst time in Nepal.

Paras Paudel, Mechanical Engineering

Paras Paudel completed B.E. in Mechanical Engineering in 2006. He was involved in various research activities in Robotics club of IOE. He is currently working as a Mechanical Engineer at Nepal Airlines Corporation. 
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How to Cite

Malik, R. K., & Paudel, P. (2010). 3D Flow Modeling of the First Trifurcation Made in Nepal. Hydro Nepal: Journal of Water, Energy and Environment, 5, 56–61. https://doi.org/10.3126/hn.v5i0.2493

Issue

Vol. 5 (2009)

Section

Articles

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