Loading...

Discharge characteristics of a modified oblique side weir in subcritical flow

Borghei, S. M ; Sharif University of Technology | 2011

1245 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.flowmeasinst.2011.04.009
  3. Publisher: 2011
  4. Abstract:
  5. Side weirs are frequently used in many water projects. Due to their position with respect to the flow direction, side weirs are categorized as plain, oblique and labyrinth. One of the advantages of an oblique side weir is the increase in the effective length of the weir for overflowing and, therefore, diverting more discharge with the same channel opening, weir height and flow properties (i.e., upstream discharge, upstream Froude number and so on). In this paper, an experimental set-up of a new design of an oblique side weir with asymmetric geometry has been studied. The hydraulic behavior of this kind of oblique side weir, with a constant opening length, different weir heights and asymmetric oblique angle, has been investigated in a subcritical situation. The results from over 200 test measurements show that this kind of weir is up to 2.33 times more efficient with respect to the conventional side weir in a rectangular channel among the tested conditions. Finally, the discharge coefficient as a function of geometrical and flow variables are presented for design engineers. In addition, a more precise relation has been obtained for flow with Froude numbers less than 0.4
  6. Keywords:
  7. Oblique weir ; Side weir ; Asymmetric geometry ; Channel opening ; Design engineers ; Discharge characteristics ; Discharge coefficients ; Effective length ; Experimental models ; Experimental setup ; Flow direction ; Flow properties ; Flow variable ; Hydraulic behavior ; New design ; Oblique angles ; Rectangular channel ; Subcritical flow ; Test measurements ; Water projects ; Froude number ; Hydraulic structures ; Weirs
  8. Source: Flow Measurement and Instrumentation ; Volume 22, Issue 5 , October , 2011 , Pages 370-376 ; 09555986 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0955598611000598