Volume 15, Issue 56 (sumer 2011)                   JWSS 2011, 15(56): 209-223 | Back to browse issues page

XML Persian Abstract Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

A. Moradi Sabz Koohi, S. S.M. Kashefipour, M. Bina. Experimental Comparison of Energy Dissipation on Drop Structures. JWSS. 2011; 15 (56) :209-223
URL: http://jstnar.iut.ac.ir/article-1-1719-en.html
, kashefipour@excite.Com
Abstract:   (22769 Views)
Drops are the most important and common hydraulic structures used as energy dissipators in irrigation networks and erodible waterways. Dissipation of energy occurs in two different ways. One portion belongs to the geometric form of the structure (briefly called loss due to structure), whereas the other occurs due to happening of hydraulic jump downstream of the structure. The dimensions of drop structure and downstream stilling basin can be optimized if geometric and hydraulic characteristics are recognized properly. In this research, the effects of drop geometry and hydraulic characteristics on the loss due to structure were investigated. At first, the effective dimensionless parameters were specified. 14 physical models of more common drops including straight, inclined and stepped drops were then built in 2 heights of 51.5 & 25.5 centimeters and 2 bed slopes of 26.6 & 33.7 degrees. The number of steps in stepped models was chosen equal to 3 and 7. With establishment of 90 flow rate, the energy losses were compared. The results showed that in the range of variable parameters, the straight drop has the maximum amount of energy dissipation.
Full-Text [PDF 494 kb]   (5034 Downloads)    
Type of Study: Research | Subject: Ggeneral
Received: 2011/10/11 | Published: 2011/07/15

Add your comments about this article : Your username or Email:

© 2020 All Rights Reserved | JWSS - Isfahan University of Technology

Designed & Developed by : Yektaweb