Shapes for Appurtenances in Stilling Basins

Pillai, N. Narayana; Unny, T. E.

doi:10.1061/jyceaj.0001038

Cited by 21 publications

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“…Helal et al(2013) used sills of different heights and in different positions to reduce scour, and found that higher sills and fully covered floors yield less scour, and vice versa. Pillai & Unny (1964) studied the effects of different baffle block shapes and found that wedge-shaped blocks with a vertex angle of 120°dissipate more energy in a shorter length than rectangular blocks. Helal (2014) found that the use of floor water jets reduces scour depth by 50 to 90% and scour hole length by 42 to 85% compared to floors without water jets.…”

Section: Introductionmentioning

confidence: 99%

Scour downstream of a corrugated apron under wall jets

Chaudhary

Ahmad

Mishra

2021

Water Practice and Technology

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Experiments were performed over smooth and corrugated aprons with different corrugation dimensions to study the scour and flow characteristics under submerged wall jets condition. The scour depth and length are significantly lower for corrugated than smooth rigid aprons. The maximum reductions in scour depth and length are 79 and 83%, respectively. Optimum scour depth and length are found for aspect ratio (ratio of corrugation wave length to amplitude) three for corrugated apron. The factors affecting scour depth and length were analyzed graphically, and empirical equations are proposed for predicting maximum scour depth and length, and the point of maximum scour depth for corrugated aprons. Velocity, turbulence characteristics, and Reynolds stress in scour holes for smooth and corrugated aprons were also studied. HIGHLIGHT This paper presents the scour downstream of corrugated apron and flow characteristics under submerged wall jets. Here scour depth and length reduces significantly than other apron. In this we have tried to develop empirical equation on single size sediment considering all the flow parameter and apron parameter. Besides this we have also conducted study related to turbulence and shear stress and velocity vector profile.

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Section: Introductionmentioning

confidence: 99%