Scour downstream of a corrugated apron under wall jets | Zendy

Rakesh Kumar Chaudhary | Zendy; Zulfequar Ahmad | Zendy; Surendra Kumar Mishra | Zendy

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Scour downstream of a corrugated apron under wall jets

Author(s) -

Rakesh Kumar Chaudhary,

Zulfequar Ahmad,

Surendra Kumar Mishra

Publication year - 2021

Publication title -

water practice and technology

Language(s) - English

Resource type - Journals

ISSN - 1751-231X

DOI - 10.2166/wpt.2021.096

Subject(s) - turbulence , geotechnical engineering , amplitude , reynolds number , geology , flow (mathematics) , aspect ratio (aeronautics) , mechanics , materials science , optics , physics , composite material

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.

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