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Hydraulic Analysis of Submerged Spillway Flows and Performance Evaluation of Chute Aerator Using CFD Modeling: A Case Study of Mangla Dam Spillway

Iranian Journal of Science and Technology, Transactions of Civil Engineering Aims and scope Submit manuscript

Abstract

Submerged spillways with large capacity outlets are generally provided below the dam crest to perform the dual functions of flood disposal and sediment flushing. Flood water passing through these spillways exhibits turbulent behavior. Moreover; hydraulic analysis of such turbulent flows is a challenging task. Therefore, the present study aims to use numerical simulations to examine the hydraulic behavior of submerged spillways constructed at Mangla Dam, Pakistan. Besides, the hydraulic performance of aerator was also evaluated at different operating conditions. Computational fluid dynamics code FLOW 3D was used to numerically model the flows of Mangla Spillway. Reynolds-averaged Navier–Stokes equations are used in FLOW 3D to numerically model the turbulent flows. The study results indicated that the developed model can simulate the submerged spillway flows as it computed the flow parameters with an acceptable error of up to 6%. Moreover, air concentration computed by model near spillway chute bed was 3% which raised to more than 6% after the installation of ramp on aerator which showed that developed model is also capable of evaluating the performance of submerged spillway aerator.

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Data Availability

The data used to support the findings of this study are available from the corresponding author upon reasonable request.

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Acknowledgements

We would like to thank the Water and Power Development Authority of Pakistan for their support in providing the essential data to conduct this study.

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No funding was received to assist with the preparation of this manuscript.

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Correspondence to Muhammad Kaleem Sarwar.

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Sarwar, M.K., Nisar, Z., Nabi, G. et al. Hydraulic Analysis of Submerged Spillway Flows and Performance Evaluation of Chute Aerator Using CFD Modeling: A Case Study of Mangla Dam Spillway. Iran J Sci Technol Trans Civ Eng 46, 3485–3497 (2022). https://doi.org/10.1007/s40996-021-00789-3

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  • DOI: https://doi.org/10.1007/s40996-021-00789-3

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