Abstract

Tarbela dam is one of the largest earth filled dam in the world. The sediments inflow in the Tarbela reservoir has resulted in reduction in water storage capacity. In addition damage to the tunnels, power generating units and ultimately to the plant equipment by the sediments particles carried by water is observed. To the authors knowledge, to-date no comprehensive simulation studies are performed for this dam reservoir and tunnels, especially at present when sediment delta and presence of sediment particles in the tunnels is observed to a reasonable extent. The aim of this study is to investigate the damage to the Tunnel 2 of the Tarbela Dam with and without considering the affect of sediment particles for one way and two way/full coupling during summer, winter and average seasons, using turbulent flows of water. Numerically calculated erosion results are compared with the experimental erosion results. Pressure, velocity and erosion rate density results are discussed in detail.

Highlights

  • To-date no comprehensive simulation studies are performed for this dam reservoir and tunnels, especially at present when sediment delta and presence of sediment particles in the tunnels is observed to a reasonable extent

  • The aim of this study is to investigate the damage to the Tunnel 2 of the Tarbela Dam with and without considering the affect of sediment particles for one way and two way/full coupling during summer, winter and average seasons, using turbulent flows of water

  • Tarbela Dam Project comprises of six tunnels, three of which are used for power generation and three for irrigation purposes

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Summary

Introduction

Tarbela Dam Project comprises of six tunnels, three of which are used for power generation and three for irrigation purposes. In this study modeling and fluid flow analysis of tunnel 2 is performed.

Turbulent Flow and Particle Tracking
Erosion Estimation and Surface Damage
Modeling and Analysis
Results and Discussion
Effect of Coupling at the High Head
Effect of No Sedimentation at High Head
Critical Period and Flow Type for Erosion Damage to the Tunnel
Conclusions

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