|Title:||Enhancing utility of submerged vanes with collar|
Ojha, C. S. P.
|Published in:||Journal of Hydraulic Engineering|
|Abstract:||Submerged vanes are submerged foils of low height and larger length, constructed in a river at an angle of attack ? to the flow to modify the near-bed flow pattern and redistribute flow and sediment transport within the channel cross section. At a Froude number (F) of 0.13, the local scour development around the submerged vane without a collar was not enough to dislodge the vane whereas at F=0.25, there was a significant local scour hole around the vane and the vane was dislodged. With the introduction of a collar at the leading edge of a submerged vane, the scour depth at the leading edge of the vane was reduced to zero. A collar of circular shape was found more suitable for a rectangular vane. Recommendations for sizing collars at two values of F are given. The optimal ? for a rectangular vane with a collar was found close to 40°. The study clearly indicates the advantages of using collars in case of submerged vanes and provides insight into selection of appropriate collar shapes. © 2010 ASCE.|
|Citation:||Journal of Hydraulic Engineering(2010), 136(9): 651-655|
|Author Scopus IDs:||13409216900|
|Author Affiliations:||Gupta, U.P., Central Water Commission, R.K. Puram, New Delhi, India|
Ojha, C.S.P., Dept. of Civil Engineering, Indian Institute of Technology, Roorkee, India
Sharma, N., Dept. of WRD and M, Indian Institute of Technology, Roorkee, India
|Corresponding Author:||Gupta, U.P.; Central Water Commission, R.K. Puram, New Delhi, India|
|Appears in Collections:||Journal Publications [CE]|
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