Yıl: 2014 Cilt: 38 Sayı: 2 Sayfa Aralığı: 126 - 138 Metin Dili: İngilizce İndeks Tarihi: 29-07-2022

Experimental investigation of screens as energy dissipaters in submerged hydraulic jump

Öz:
This study investigated the effectiveness of screens as energy dissipaters in small hydraulic structures using physical experiments. In the experimental design, the Froude number, screen arrangements, and screen porosity were the major controlling parameters. The experiments covered a range of Froude numbers between 2.5 and 8.5, screen porosity of 40% and 50%, and gaps of double screens between 1 and 5 cm. The main goal of this study was investigation of the screens creating submerged hydraulic jumps. The flow depth was digitally measured in order to perceive the turbulences and validate the results of energy dissipation against those of the methods in the literature. The experimental results show the importance of each parameter on the screen performance. The screens with double arrangement with the imposed hydraulic jump dissipated more energy. The gaps of the double arrangement had an insignificant effect on energy dissipation. The double screen with porosity of 40% had the best performance. Since the Froude number was found to be the most effective parameter, quadratic equations as a function of this number were fitted to the experimental results with high R2 and very low RMSE values. The quadratic equations can be employed as interpolators and/or extrapolators.
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Konular: Çevre Mühendisliği
Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık
  • [1] Wei CY, Lindell JE. Hydraulic design of stilling basin and energy dissipators. In: Mays LW, editor. Hydraulic Design Handbook. Chicago, IL, USA: McGraw-Hill; 1999. pp. 18.1–18.55.
  • [2] Chanson H. Energy dissipation and drop structures in ancient times: the Roman dropshafts. In: Proceedings of 25th Hydrology & Water Resources Symposium, 2nd International Conference on Water Resources & Environment Research, Vol. 2. Brisbane, Australia; 1999. pp. 987–992.
  • [3] Carvalho RF, Leandro J. Hydraulic characteristics of a drop square manhole with a downstream control date. J Irrig Dain E-ASCE 2011; 138: 569–576.
  • [4] Burgi PH. Hydraulic design of vertical stilling wells. J Hydr Div 1975; 101: 801–816.
  • [5] Peterka AJ. Hydraulic Design of Stilling Basins and Energy Dissipators. 4th ed. Washington, DC, USA: Department of the Interior, Bureau of Reclamation; 1978.
  • [6] Mason PJ. Practical guidelines for the design of flip buckets and plunge pools. Int Water Power Dam Constr 1993; 45: 40–45.
  • [7] Espinoza EVM, Zevallos JMK. Scour in non-cohesive soil due to the impact of jet spillway out of ski jump. In: Walton R, editor. Proceedings of World Water and Environmental Resources Congress, Anchorage, Alaska: ASCE; 2005. pp. 1–11.
  • [8] Schmocker L, Pfister M, Hager WH, Minor HE. Aeration characteristics of ski jump jets. J Hydraul Eng-ASCE 2008; 134: 90–97.
  • [9] Rajaratnam N, Hurtig KI. Screen-type energy dissipator for hydraulic structures. J Hydraul Eng-ASCE 2000; 126: 310–312.
  • [10] C¸ akır P. Experimental investigation of energy dissipation through screens. MSc, Middle East Technical University, Ankara, Turkey, 2003.
  • [11] Bozkus Z, Cakir P, Ger M, Ozeren Y. Energy dissipation through screens. In: Sehlke G, Hayes DF, Stevens DK, editors. Proceedings of the 2004 World Water and Environmental Resources Congress. Salt Lake City, Utah, USA:ASCE; 2004. pp. 1–8.
  • [12] Bozkus Z, Cakir P, Ger M. Energy dissipation by vertically placed screens. Can J Civil Eng 2007; 34: 557–564.
  • [13] Balkıs G. Experimental investigation of energy dissipation through inclined screens. MSc, Middle East Technical University, Ankara, Turkey, 2004.
  • [14] Bozkus Z, Balkis G, Ger M. Effect of inclination of screens on energy dissipation downstream of small hydraulic structures. In: Schmidt N, editor. Proceedings of the 17th Canadian Hydrotechnical Conference, Edmonton, Alberta, Canada; 2005. pp. 881–890.
  • [15] Bozkus Z, G¨ung¨or E, Ger M. Energy dissipation by triangular screens. In: Proceedings of the Seventh International Congress on Advances in Civil Engineering, Yıldız Technical University, ˙Istanbul, Turkey: ACE; 2006.
  • [16] Aslankara V. Experimental investigation of tailwater effect on the energy dissipation through screens. MSc, Middle East Technical University, Ankara, Turkey, 2007.
  • [17] Bozkus Z, Aslankara V. Tailwater effect on the energy dissipation through screens. In: Proceedings of the 8th International Congress on Advances in Civil Engineering, Eastern Mediterranean University, Famagusta, North Cyprus: ACE; 2008.
  • [18] Sadeghfam S. Experimental investigation of screens as energy dissipator. MSc, Razi University, Kermanshah, Iran, 2012.
  • [19] Chow VT. Open Channel Hydraulics. 3rd ed. New York, NY, USA: McGraw-Hill; 1959.
  • [20] Belaud G, Cassan L, Baume JP. Calculation of contraction coefficient under sluice gates and application to discharge measurement. J Hydraul Eng-ASCE 2009; 135: 1086–1091.
  • [21] Rajaratnam N, Subramanya K. Flow immediately below submerged sluice gate. J Hydr Div 1977; 93: 57–77.
APA SADEGHFAM S, AKHTARI A, Daneshfaraz R, TAYFUR G (2014). Experimental investigation of screens as energy dissipaters in submerged hydraulic jump. , 126 - 138.
Chicago SADEGHFAM Sina,AKHTARI Ali Akbar,Daneshfaraz Rasoul,TAYFUR Görkmen Experimental investigation of screens as energy dissipaters in submerged hydraulic jump. (2014): 126 - 138.
MLA SADEGHFAM Sina,AKHTARI Ali Akbar,Daneshfaraz Rasoul,TAYFUR Görkmen Experimental investigation of screens as energy dissipaters in submerged hydraulic jump. , 2014, ss.126 - 138.
AMA SADEGHFAM S,AKHTARI A,Daneshfaraz R,TAYFUR G Experimental investigation of screens as energy dissipaters in submerged hydraulic jump. . 2014; 126 - 138.
Vancouver SADEGHFAM S,AKHTARI A,Daneshfaraz R,TAYFUR G Experimental investigation of screens as energy dissipaters in submerged hydraulic jump. . 2014; 126 - 138.
IEEE SADEGHFAM S,AKHTARI A,Daneshfaraz R,TAYFUR G "Experimental investigation of screens as energy dissipaters in submerged hydraulic jump." , ss.126 - 138, 2014.
ISNAD SADEGHFAM, Sina vd. "Experimental investigation of screens as energy dissipaters in submerged hydraulic jump". (2014), 126-138.
APA SADEGHFAM S, AKHTARI A, Daneshfaraz R, TAYFUR G (2014). Experimental investigation of screens as energy dissipaters in submerged hydraulic jump. Turkish Journal of Engineering and Environmental Sciences, 38(2), 126 - 138.
Chicago SADEGHFAM Sina,AKHTARI Ali Akbar,Daneshfaraz Rasoul,TAYFUR Görkmen Experimental investigation of screens as energy dissipaters in submerged hydraulic jump. Turkish Journal of Engineering and Environmental Sciences 38, no.2 (2014): 126 - 138.
MLA SADEGHFAM Sina,AKHTARI Ali Akbar,Daneshfaraz Rasoul,TAYFUR Görkmen Experimental investigation of screens as energy dissipaters in submerged hydraulic jump. Turkish Journal of Engineering and Environmental Sciences, vol.38, no.2, 2014, ss.126 - 138.
AMA SADEGHFAM S,AKHTARI A,Daneshfaraz R,TAYFUR G Experimental investigation of screens as energy dissipaters in submerged hydraulic jump. Turkish Journal of Engineering and Environmental Sciences. 2014; 38(2): 126 - 138.
Vancouver SADEGHFAM S,AKHTARI A,Daneshfaraz R,TAYFUR G Experimental investigation of screens as energy dissipaters in submerged hydraulic jump. Turkish Journal of Engineering and Environmental Sciences. 2014; 38(2): 126 - 138.
IEEE SADEGHFAM S,AKHTARI A,Daneshfaraz R,TAYFUR G "Experimental investigation of screens as energy dissipaters in submerged hydraulic jump." Turkish Journal of Engineering and Environmental Sciences, 38, ss.126 - 138, 2014.
ISNAD SADEGHFAM, Sina vd. "Experimental investigation of screens as energy dissipaters in submerged hydraulic jump". Turkish Journal of Engineering and Environmental Sciences 38/2 (2014), 126-138.