Dissipation of mechanical energy over spillway through counter flow

Građevinar

article

Amad Deen Abdusalam Alghwail¹  Svetlana Stevović²  Mohammad A. Abourohiem³ 

[1] Lecturer at Elmergib University, Libya Union-Nikola Tesla University;University of Belgrade Faculty of Mechanical Engineering Innovation Center;Alexandria University, Egypt Faculty of Civil Engineering

关键词: energy dissipation;    local scour;    counter flow dissipater;    hydraulic jump;    stilling basin length;   

DOI  :  10.14256/JCE.1691.2016

学科分类：社会科学、人文和艺术（综合）

来源: Hrvatsko Drustvo Gradevinskih Inzenjera

【 摘 要 】

A reversed flow in form of cross-jet serves for dissipation of the energy of flow after spillway. Parameters influencing characteristics of hydraulic jump are systematically investigated via a physical model. The obtained results reveal that the reversed flow can speed up the transition from supercritical to subcritical flow by creating a forced hydraulic jump and, consequently, by shortening the protection length needed to counter scouring problems downstream of the channel, since the length of hydraulic jump is reduced by 19%. The efficiency of such energy dissipation methods can have a significant impact on the overall construction cost of hydraulic structures.

【 授权许可】

CC BY