Flow Downstream Sluice Gate with Orifice

다국어 초록 (Multilingual Abstract)

Gates and orifices were significant common structures used in controlling and adjusting the flow in water system channels. Installing of an orifice with sluice gates, increase the flow discharge with minimizing the horizontal jets under gate that was attributed with higher bed flow velocity and larger scour geometry downstream these gates. An experimental study was conducted to examine the flow pattern and the bed configurations downstream sluice gates with an orifice. In this research, a circular orifice employed with sluice gates as a means of energy dissipation downstream the gates, was explored. Forty-five runs were completed under 3 discharges, 3 upstream water heads, and 7 tail gate water depths. Five models for sluice gate with orifice were utilized. A series of regime plots were created to help designing the sluice gate with orifice as heading up and flow distributions structures. The outcomes illustrated that combining of an orifice with sluice gates productively scattered the jump energy and diminished the downstream local scour compared to the conventional sluice gate. Additionally,existed equations used to predict the jump length downstream sluice gate were applicable in case of sluice gate with orifice provided similar flow conditions were achieved. The optimum ratio of orifice and under gate areas was also introduced.

참고문헌 (Reference)

1 Oskuyi N, "Vertical sluice gate discharge coefficient" 2 (2): 108-114, 2012

2 Yaser SG, "Three-dimension numerical simulation of scour temporal changes due to flow in the downstream of combined weirs and gate model" 3 (3): 1111-1120, 2011

3 Majcherek H, "Submerged discharge relations of logarithmic weirs" 110 (110): 840-846, 1984

4 Saleh IK, "Study the free flow over compound weir and below semi circular gate" 4 (4): 1486-1491, 2013

5 Bambang S, "Study of hydraulic jump length coefficient with the leap generation by canal gate model" 5 (5): 148-154, 2017

6 Swamee P, "Sluice-gate discharge equations" 118 (118): 56-60, 1992

7 Matahel A, "Simultaneous flow over and under a gate" 127 (127): 325-328, 2001

8 Vito F, "Simultaneous flow over and under a gate" 126 (126): 190-193, 2000

9 USBR, "Research studies on stilling basins, energy dissipators and associated appurtenances" Hydraulic Laboratory 393-438, 1955

10 Henderson FM, "Open channel flow" Macmillan 202-210, 1966

11 Carollo FG, "New solution of classical hydraulic jump" 135 : 527-531, 2009

12 Gupta SK, "Modeling of relative length and relative energy loss of free hydraulic jump in horizontal prismatic channel" 51 : 529-, 2013

13 McCorquodale JA, "Internal flow in hydraulic jumps" 109 : 684-701, 1983

14 Wu, "Hydraulics course material. Section 29.5"

15 Douma, "Hydraulics course material. Section 29.5"

16 Safranez, "Hydraulics course material. Section 29.5"

17 Woycicki, "Hydraulics course material. Section 29.5"

18 Chertoussov, "Hydraulics course material. Section 29.5"

19 Ivanchenko, "Hydraulics course material. Section 29.5"

20 Silvester R, "Hydraulic jump in all shapes of horizontal channels" 90 : 23-, 1964

21 Rajaratnam N, "Free flow immediately below sluice gate" 103 (103): 345-351, 1977

22 Hayawi H, "Free combined flow over a triangular weir and under rectangular gate" 24 : 9-22, 2008

23 Yaser S, "Flow upstream of orifices and sluice gates" 131 (131): 127-133, 2005

24 Rajaratnam N, "Flow equation for the sluice gate" 93 (93): 167-186, 1967

25 Shaker AJ, "Experimental study of combined oblique weir and gate structure" 8 (8): 306-315, 2013

26 Shahabi M, "Experimental investigation of the effect of contraction on scouring in downstream of combined flow over weirs and below gate" 2011

27 Dehghani A, "Experimental investigation of scouring in downstream of combined flow over weirs and below gates" 2009

28 Karbasi M, "Estimation of classical hydraulic jump length using teaching–learning based optimization algorithm" 7 (7): 2947-2954, 2016

29 Hager WH, "Energy dissipators and hydraulic jump" Springer Science and Business Media 8-, 1992

30 Leutheusser H, "Effects of inflow conditions on hydraulic jump" 98 (98): 1367-1385, 1972

31 Delwar H, "Dynamic study of simultaneous underflow-overflow past low head sluice gates" 11 (11): 51-67, 1999

32 Dehghani A, "Downstream scour of combined flow over weirs and below gates" 2010

33 Garbrecht G, "Discussion of ‘Discharge computations at river control structures’ by L" 103 (103): 1481-1484, 1977

34 Negm A, "Discharge prediction model for simultaneous underflow-overflow" 665-670, 1996

35 Alhamid A, "Discharge equation for simultaneousflow over rectangular weirs and below inverted triangular weirs" 14 (14): 595-607, 1996

36 Alhamid A, "Discharge equation for proposed self-cleaning device" 9 (9): 13-24, 1997

37 Negm A, "Combined-free flow over weirs and below gate" 40 (40): 359-365, 2002

38 Jamal M, "Combined flow over weir and under gate" 135 (135): 2009

39 Hayawi H, "Coefficient of discharge for a combined hydraulic measuring device" 17 (17): 92-100, 2009

40 Negm A, "Characteristics of simultaneous flow over weir and below inverted V-notches" Faculty of Engineering, Al-Azher University 16 (16): 786-799, 1994

41 Carlos S, "Benchmark of discharge calibration methods for submerged sluice gates" 135 : 676-682, 2009

42 Abdel-Azim M. Negm, "Analysis and formulation of flow through combined v-notch-gate-device" Informa UK Limited 40 (40): 755-765, 2010

43 Alhamid AA, "Analysis and formulation of flow through combined V-notch-gate-device" 37 (37): 697-705, 1999

44 Nasrin H, "An experimental study of hydraulic jump in a gradually expanding rectangular stilling basin with roughened bed" 9 (9): 2017