Experimental Investigation of Curved Trash Screens

Zayed, Mahmoud; Molla, Anas El; Sallah, Mohammed

doi:10.1061/(asce)ir.1943-4774.0001472

Cited by 5 publications

(1 citation statement)

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“…The continuous hazards due to screen clogging in hydroelectric plants and turbines caused significant head loss, resulting in reduced operational efficiency or fatal operational failure. Several experimental research on-screen performances under various screen blockage instances have been carried out e.g., [2,3,4,5,6,7], and flow pattern variations caused by screen blockage results in an intensifies screen head losses, leading to a less hydraulically efficient inlet condition. The efficiency of screen blockage typically has a substantial impact on a variety of societal facets, including vital domains like infrastructure, the built environment, and economic activity.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of interaction of turbulent flow with trash screen in open channels

Kokkiligadda,

Dhar,

Reddy Hanmaiahgari

2024

J. Phys.: Conf. Ser.

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Trash screens are widely employed at the entrance of hydraulic structures, water intakes, and pumping stations to trap flowing debris that could exasperate downstream troubles. The characteristics of the vertical trash screen flow are measured using a Three-Dimensional Acoustic Doppler Velocimetry instrument for different flow conditions. The governing equations of the flow are numerically solved using k–ω SST, k–ϵ STD, k–ϵ RNG, and Reynolds Stress Model (RSM) and Large Eddy Simulations (LES). ANSYS-Fluent is used for these numerical simulations. The free surface of the vertical trash screen flow is computed by the volume of fluid method. The Grid Convergence Index is used to analyze the impact of the chosen grid structure on the numerical results. Experimental measurements of the velocity field and free surface profiles are compared with the numerical results of 3D simulations for validation. This study aims to identify the behavior of flow through screens in more detail through experimental and numerical simulations. The computed flow profiles considering all five cases agree well with the measured profile, whereas streamwise velocity in most portions of the flow, the k-ω SST outperforms the other models, and the RSM turbulence model is the second most effective.

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Section: Introductionmentioning

confidence: 99%