Header menu link for other important links
Control of sediment entry into an intake canal by using submerged vanes
Sruthi Thazhathe Kalathil, K. B. Ranjith,
Published in American Institute of Physics Inc.
Volume: 1875
River flow which is entering into an intake canal carries lot of sediment due to centrifugal action at river-intake junction and results in various problems. The present work aims to control sediment entry into an intake canal by modifying flow pattern using submerged vanes. Experiments are conducted in a 57.5 cm wide rectangular laboratory model filled with sediment, d50=0.28mm, for a constant discharge of 0.025m3/s and flow depth (H) of 8cm. A rigid bed trapezoidal channel (side slopes, 1H: 1V) of bed width 15 cm, diverting at an angle of 45°from river model is used as an intake channel. Submerged vanes of width 0.18H and 1mm thick are arranged in single and double rows at a spacing (Vs) of 8cm and 12cm. The angle of attack (θ) of vane with respect to flow direction in river model varies as 15°, 300 and 450. A total of seven vanes are arranged as a crest of wave with a central vane height of 0.625 H and decreasing gradually to 0.438H on either side. In single row vane arrangement, for 'Vs'=8 cm and 'θ'=15°, 30°and 450, the sediment entry (S) reduces to 43%, 47% and 57% of sediment entry without vanes (So) and it is 40%, 44% and 48% of 'So' for 'Vs'= 12cm. Further 'S' reduces to 38%, 39% and 47% of 'So', by adding a second row of vanes at a lateral spacing and 'Vs' of 8cm. It is observed that 'S' decreases with an increase of 'Vs' as well as with addition of a second row of vanes and increases with an increase of 'θ'. © 2017 Author(s).
About the journal
JournalData powered by TypesetAIP Conference Proceedings
PublisherData powered by TypesetAmerican Institute of Physics Inc.
Open AccessYes