Numerical Study of the Effective Parameters on the Energy Dissipation Rate of the Baffled Chutes

Document Type : Original Article

Authors

1 M.Sc. Student, Department of Water and Hydraulic Structures Engineering, Zanjan University, Zanjan, Iran

2 Associate Professor, Department of Civil Engineering, Zanjan University, Zanjan, Iran

3 Assistant Professor, Department of Water and Hydraulic Structures Engineering, ZanjanUniversity, Zanjan, Iran.

Abstract

Baffled chutes are structures that are used to dissipate energy in chutes and water transmission and distribution structures. In the present study, baffled chutes were numerically studied using the Flow-3D numerical model. For this purpose, upon defining the boundary conditions, the validation was done using available experimental data and then, the effect of slope, chute length as well as the distance between baffles and their height on the energy dissipation rate of the baffled chutes was studied. The results showed that by increasing the distance between the baffle rows, the energy dissipation rate decreased. By increasing the height of the baffles using the design method proposed by the USBR, the energy dissipation rate slightly decreased. For similar slopes and other dimensions, by increasing the chute length by three times, the energy dissipation increased by 21.4%, and the energy dissipation rate decreased by increasing chute slope.
Keywords: Baffled Chutes ، Energy Dissipation ، FLOW-3D

Keywords

References

جم ، م .، طالب بیدختی، ن .، و مردشتی، ا. 2014. ارزیابی استهلاک انرژی روی سرریز دندانه‌دار بلوکی و مقایسه آن با سرریز پلکانی. نشریه هیدرولیک, 9(2), 1-10.‎
راشکی قلعه نو ، م .، اژدری مقدم ، م .، عزیزیان ، غ .، کامران ، خ . 2018. شبیه سازی عددی استهلاک انرژی در تندآب با موانع استوانه ای مستغرق با مدل Flow- 3D. علوم و مهندسی آبیاری, 41(4), 17-28.‎
خوشتراش، م .، شرافتی، ا .، تقیان جمالی، ح .2017. آنالیز و ارزیابی تأثیر مشخصات هندسی بر استهلاک انرژی در سرریزهای پلکانی دارای شیب منفی با استفاده از نرم افزار Flow- 3D.‎ شانزدهمین کنفرانس هیدرولیک ایران، اردبیل، انجمن هیدرولیک ایران-دانشگاه محقق اردبیلی.
لرنژاد ، ا .، قنواتی ، م .، صمدی رحیم ، ع .، یونسی ، ح .2017. ارزیابی استهلاک انرژی در شیب شکن های مایل مستطیلی با استفاده از مدل Flow3D.‎ شانزدهمین کنفرانس هیدرولیک ایران، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل.
Rhone,1. J. 1971. Studies to Determine the Feasibility of a Baffled Apron Drop as a Spiliway Energy Dissipator-
Conconully Dam Spillway-Okanogan Project. Washington U.S. Bureau of Reclamation Report REC-ERC-71-29.
Peterka, A. 1964 .Hydraulic Design of Stilling Basins and Energy Dissipators. Engineering Monograph No 25 U.S.
Department of Interior Bureau of Reclamation pp 154-188.
Brown, C., Crowley, R. 2018. United States Bureau of Reclamation Type IX Baffled Chute Spillways: A New Examination of Accepted Design Methodology Using CFD and Monte Carlo Simulations, Part I. In Multidisciplinary Digital Publishing Institute Proceedings (Vol. 7, No. 1, p. 13).
Katourany, S., Kashefipour, S. M. 2012. Experimental investigation the effect of space and size of baffles on energy dissipation in baffled apron drop. Archives Des Sciences, 65(6).
Christodoulou, G. C. 1993. Energy dissipation on stepped spillways. Journal of Hydraulic
Engineering, ASCE, 119(5):644-649.
Chinnarasri, C., Wongwises, S. 2006. Flow patterns and Energy dissipation over various stepped
chutes. Journal of Hydraulic Engineering, ASCE, 116(4): 587-691.
Rahmanshahi, Z.M.,Shafai Bajestan M. 2012. Experimental Investigation of the Effect of Chute Bed Roughness Height on Energy Dissipation. Journal of Water and Soil Science. Vol 22, Num 2, Summer 2012, pp: 95-106. (In Persian).
Iranian Journal of Irrigation & Drainage
Volume 14, Issue 3 - Serial Number 81
July and August 2020
Pages 796-806

Files

Share

How to cite

Statistics