Physical Modeling of Ski-Jump Spillway to Evaluate Dynamic Pressure

Water

卷:11

Mehdi Karami Moghadam¹  Thamer Mohammad²  Hasan Hoseini³  MarlindaAbdul Malek⁴  Ata Amini⁵ 

[1] Department of Agriculture, Payame Noor University (PNU), Tehran 19395-4697, Iran;

[2] Department of Water Resources Engineering, College of Engineering, University of Baghdad, Baghdad 10011, Iraq;

[3] Faculty of Water Sciences Engineering, Shahid Chamran University of Ahvaz, Ahvaz 6135783151, Iran;

[4] Institute of Sustainable Energy, Universiti Tenaga Nasional, Selangor 43000, Malaysia;

[5] Kurdistan Agricultural and Natural Resources Research and Education Center, AREEO, Sanandaj 6616949688, Iran;

关键词: jet falling;    energy dissipation;    surface disturbances;    pressure fluctuations;    water jet;    physical modeling;   

DOI  :  10.3390/w11081687

来源: DOAJ

【 摘 要 】

The effects of changes in the angle of pool impact plate, plunging depth, and discharge upon the dynamic pressure caused by ski-jump buckets were investigated in the laboratory. Four impact plate angles and four plunging depths were used. Discharges of 67, 86, 161, and 184 L/s were chosen. For any discharge, plunging depth and impact plate angle were regulated, and dynamic pressures were measured by a transducer. The results showed that with the increase in the ratio of drop length of the jet to its break-up length (H/L_b), and with an increase in the impact plate angle, the mean dynamic pressure coefficient decreased. An inspection of the plunging depth (Y) ratio to the initial thickness of the jet (B_j) revealed that when Y/B_j > 3, the plunging depth of the downstream pool reduced dynamic pressure. At the angle of 60°, the dynamic pressure coefficient due to increasing in plunging depth varied from 34% to 95%.

【 授权许可】

Unknown