Session
Session 6 2022
Start Date
10-27-2022 12:00 AM
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Jaiswal A., Ahmad, Z., and Mishra, S.K. (2022). "Effect of Diameter and Inlet-Depth on Hydro-Suction Performance of a Suction Pipe" in "9th IAHR International Symposium on Hydraulic Structures (9th ISHS)". Proceedings of the 9th IAHR International Symposium on Hydraulic Structures – 9th ISHS, 24-27 October 2022, IIT Roorkee, Roorkee, India. Palermo, Ahmad, Crookston, and Erpicum Editors. Utah State University, Logan, Utah, USA, 8 pages (DOI: 10.26077/aa4f-76f0) (ISBN 978-1-958416-07-5).
Abstract
Sedimentation in rivers and reservoirs leads to inundation of surrounding areas, topsoil degradation, low depth for navigation, loss of reservoir capacity, etc. Hydro-suction is a process of sediment removal in which sediment is sucked along with water using a suction pipe placed vertically on/above/below the sediment bed. This paper deals with the effect of diameter and inlet-depth of suction pipe on performance of hydro-suction. A series of experiments are performed using five suction pipes of diameter of 5.08×10-2 m, 7.62×10-2 m, 10.16×10-2 m, 12.70×10-2 m, and 15.24×10-2 m, placed at inlet depth of 0.015 m and 0.03 m, under discharge ranging from 0.5×10-3 m3/s to 3×10-3 m3/s and median sediment size of 0.33 mm. Hydro-suction performance is evaluated by the sediment volume removed, which is calculated from the experimental data of scour profile. The investigation inferred that for a constant diameter, hydro-suction performance decreases with an increase in suction inlet depth. An increase in hydro-suction performance is seen up to suction pipe diameter of 10.16×10-2 m, and any further increase in suction pipe diameter decreases the hydro-suction performance.
Effect of Diameter and Inlet-Depth on Hydro-Suction Performance of a Suction Pipe
Sedimentation in rivers and reservoirs leads to inundation of surrounding areas, topsoil degradation, low depth for navigation, loss of reservoir capacity, etc. Hydro-suction is a process of sediment removal in which sediment is sucked along with water using a suction pipe placed vertically on/above/below the sediment bed. This paper deals with the effect of diameter and inlet-depth of suction pipe on performance of hydro-suction. A series of experiments are performed using five suction pipes of diameter of 5.08×10-2 m, 7.62×10-2 m, 10.16×10-2 m, 12.70×10-2 m, and 15.24×10-2 m, placed at inlet depth of 0.015 m and 0.03 m, under discharge ranging from 0.5×10-3 m3/s to 3×10-3 m3/s and median sediment size of 0.33 mm. Hydro-suction performance is evaluated by the sediment volume removed, which is calculated from the experimental data of scour profile. The investigation inferred that for a constant diameter, hydro-suction performance decreases with an increase in suction inlet depth. An increase in hydro-suction performance is seen up to suction pipe diameter of 10.16×10-2 m, and any further increase in suction pipe diameter decreases the hydro-suction performance.