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Title: Enhancing utility of submerged vanes with collar
Authors: Gupta U.P.
Ojha, C. S. P.
Sharma N.
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
Issue Date: 2010
Keywords: Froude number
Sediment transport
ISSN: 7339429
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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