Investigating the Characteristics of the Hydraulic Jump in a Stilling Basin with Netted Perforated Bed

Akbari, Nima; Esmaili, Kazem; Khodashenas, Saeedreza

doi:10.22092/idser.2018.121658.1315

Document Type : Original Article

Authors

¹ Water Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran

² Water engineering, Faculty of agriculture, Ferdowsi university of Mashhad

³ Ferdowsi University

https://doi.org/10.22092/idser.2018.121658.1315

Abstract

In this research, the effects of a network of holes in the bottom of the stilling basin on the main properties of the hydraulic jump, such as the sequent depths ratio and the jump length, have been studied. First, by mathematical analysis and expansion of the momentum equation, an equation for the direct calculation of sequent depths ratio was obtained while flow rate in the channel decreased. Using a laboratory flume , equipped with a network of valves under the bed, a series of experiments were conducted in order to study the behavior and characteristics of hydraulic jump, the results of which were compared with the results obtained from classical hydraulic jump on a smooth bed. The Froude number range in this research was between 5.3 and 7.4 and the ratio of the remaining flow at downstream to incoming flow to the channel was between 0.98 to 0.995. Results showed that reducing the flow rate up to two percent in the channel caused decreasing sequent depths ratio by 19 and 12 percent, compared to classical jump and analytical equation, respectively; the jump length decreased by 29 percent, compared to the classical jump.

Keywords

References

Abbaspour, A., Dalir A. M., Farsadizadeh, D. and Sadraddini, A. A. 2009. Effect of sinusoidal corrugated bed on hydraulic jump characteristics. J. Hydroenviron. Res. 3, 109-117.

Badizadegan, R., Esmaeili, K., Maghrebi, M. F. and Saneie, M. 2011. Hydraulic jump properties in irrigation canals with corrugated bed. J. Water Soil. 25(3): 676-687. (in Persian)

Bazzaz, M., Ghorbani, B. and Eskini, M. 2012. Studding the changes of hydraulic jump properties on rough beds relative to roughness wavelengths. J. Hydraul. 7(3): 33-42.
(in Persian)

Carollo, F. G., Fero, V. and Pampalone, V. 2007. Hydraulic jumps on rough beds. J. Hydraul. Eng. 133(9): 989-999.

Chow, V. T. 1959. Open-Channel Hydraulics. McGraw-Hill.

Dastourani, M., Esmaili, K. and Khodashenas, S. R. 2016. The impact of water rectangular jet angel on the characteristics of hydraulic jump. J. Water Soil Conserv. 23(3): 225-238.
(in Persian)

Ead, S. A. and Rajaratnam, N. 2002. Hydraulic jumps on corrugated beds. J. Hydraul. Eng. ASCE. 128(7): 656-663.

Esmaili, K. and Abrishami, J. 2001. Hydraulic jump over negative slopes with negative steps. Jame. 19(2): 97-110. (in Persian)

Farhoudi, J. Flow in Open Streams (Translation). 1993. Orumiyeh University Pub.

Forster, J. W. and Skrinde, R. A. 1950. Control of the hydraulic jump by sills. Transaction ASCE. 115, 973-987.

Gohari, A. and Farhoudi J. 2009. The characteristics of hydraulic jump on rough bed stilling basins. 33^rd IAHR Congress: Water Engineering for a Sustainable Environment, Vancouver, Aug. 9-14. British Columbia.

Hager, W. H. and Bremen, R. 1989. Classical Hydraulic Jump: Sequent Depths Ratio. J. Hydraul. Res. 27(5): 565-585.

Hager, W. H. 1992. Energy Dissipaters and Hydraulic Jump. Kluwer Academic, Dordrecht, the Netherlands.

Hosseini, S. M. and Abrishami, J. 1999. Open Channel Hydraulics. Second Ed. Astan Quds Razavi Pub. Mahhad, Iran. (in Persian)

Hughes, W. C. and Flack, J. E. 1984. Hydraulic jump properties over a rough bed. J. Hydraul. Eng. 110(12): 1755-1771.

Izadjoo, F. and Shafai-Bajestan, M. 2007. Corrugated bed hydraulic jump stilling basin. J. Appl. Sci. 7(8):1164-1169.

Najandali, A., Esmaili, K. and Farhoudi, J. 2012. The effect of triangular blocks on the characteristics of hydraulic jump. J. Water Soil. 26(2): 282-289. (in Persian)

Pagliara, S., Lotti, I. and Palermo, M. 2008. Hydraulic jump on rough bed of stream rehabilitation structures. J. Hydroenviron. Res. 2, 29-38.

Peterka, A. J. 1958. Hydraulic Design of Stilling Basins and Energy Dissipators. US Department Interior, Bureau of Reclamation, Engineering Monograph. (Appeared a LSO as 7^th Printing in 1983).

Rajaratnam, N. 1968. Hydraulic jumps on rough beds. Trans. Eng. Inst. Canada. 11(A-2): 1-8.

Tokyay, N. D. 2005. Effect of channel bed corrugations on hydraulic jumps. In Impacts of Global Climate Change Conference, EWRI. May 15-19. Anchorage, Alaska, USA.

Varol, F. A., Cevik, E. and Yüksel, Y. 2009. The Effect of water jet on the hydraulic jump. 13^th International Water Technology Conference, IWTC. March 12. Hurghada, Egypt.

Yüksel, Y., Günal, M., Bostan, T., Cevik, E. and Celikoglu, Y. 2004. The influence of impinging jets on hydraulic jumps. Process of the Institution of Civil Engineering, Water Manage.
157, 63-76.

Irrigation and Drainage Structures Engineering Research

Investigating the Characteristics of the Hydraulic Jump in a Stilling Basin with Netted Perforated Bed

References

References

Volume 20, Issue 75 - Serial Number 75
August 2019
Pages 71-84

Investigating the Characteristics of the Hydraulic Jump in a Stilling Basin with Netted Perforated Bed

References

References

Volume 20, Issue 75 - Serial Number 75August 2019Pages 71-84

Volume 20, Issue 75 - Serial Number 75
August 2019
Pages 71-84