آمار
| تعداد نشریات | 20 |
| تعداد شمارهها | 423 |
| تعداد مقالات | 3,364 |
| تعداد مشاهده مقاله | 3,560,373 |
| تعداد دریافت فایل اصل مقاله | 2,313,400 |
An experimental investigation of the influence of zigzag walls in the stilling basin on the hydraulic jump's properties | ||
| فناوری های پیشرفته در بهره وری آب | ||
| مقاله 1، دوره 5، شماره 4، دی 1404، صفحه 1-14 اصل مقاله (756.93 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22126/atwe.2025.12036.1162 | ||
| نویسندگان | ||
| Humam Amer Hadi1؛ Ali Akbar Akhtari* 2؛ Atheer Zaki Al-Qaisi3 | ||
| 1Department of Civil Engineering, Faculty of Engineering, Razi University of Kermanshah, Iran. | ||
| 2Department of Civil Engineering, Faculty of Engineering, Razi University of Kermanshah, Kermanshah, Iran. | ||
| 3Department of Water Resources Management Engineering, College of Engineering, AL-Qasim Green University, Babylon, Iraq. | ||
| چکیده | ||
| Objective: The objective of this study is to assess how stilling basin wall geometry (smooth vs. zigzag) affects hydraulic jump behavior and energy dissipation.It also investigates whether zigzag walls improve supercritical-to-subcritical flow conversion, reduce downstream scour, and support shorter, more efficient basin designs. Method: The study used two stilling basin models in a hydraulic flume at the University of Babylon: Case 1 with smooth walls and blocks, and Case 2 with zigzag walls and the same blocks. Twenty-two runs (11 per case) were tested with discharges of 10–20 L/s, maintaining supercritical inlet Froude numbers of 4.30–5.70, and energy dissipation and downstream Froude numbers were measured for comparison. Results: The results indicate that the average relative energy dissipation reached 61.1% in Case 1 and 64.9% in Case 2, demonstrating a 3.8% increase attributed to zigzag wall geometry. Additionally, energy dissipation in the smooth-wall basin exhibited high sensitivity to changes in Fr₁, with a 28.1% variation across the tested Froude range, whereas the zigzag configuration showed much more stable performance, with only 5.1% variation. Case 2 also generated lower downstream Froude numbers (Fr₂ between 0.46 and 1.20), reflecting better subcritical flow conditions. The free surface profile differed notably between cases, with Case 2 showing lower water depths in the center than near the side walls, while Case 1 maintained nearly uniform depths across the width. Conclusions: The study concludes that zigzag side walls significantly enhance and stabilize hydraulic energy dissipation, leading to more favorable downstream flow regimes and reduced scour potential, which directly benefits dam safety. The lower Fr₂ values observed in Case 2 confirm improved compatibility with natural river flow conditions. The higher dissipation efficiency also suggests that zigzag geometry can help reduce the required length of stilling basins, offering a design advantage in both performance and economy. Although the zigzag walls create a non-uniform free surface profile, this behavior contributes positively to increased energy losses. Overall, the findings support the adoption of zigzag walls with middle blocks as an effective option for optimizing stilling basin performance and reducing structural dimensions. | ||
| کلیدواژهها | ||
| Energy dissipater؛ Free surface profile؛ Hydraulic jump؛ Spillway؛ Stilling basin | ||
| مراجع | ||
|
Chow, V. T. (1988). Open channel hydraulics. McGraw-Hill Book Publications Columbus, Ohio, U.S. https://www.accessengineeringlibrary.com/binary/mheaeworks
Bhowmik, N. G., (1971). Hydraulic Jump Stilling Basin for Froude Number 2.5 to 4.5. Illinois State Water Survey Publications, Urbana, USA. https://books.google.com/books/about/Hydraulic_Jump_Type_Stilling_Basins_for.html?id=KUd2GQAACAAJ
Ead, S.A., & Rajaratnam, N. (2002). Hydraulic jump on corrugated bed. Journal of Hydraulic Engineering, ASCE, 128(7), 656-663. https://doi.org/10.1061/(ASCE)0733-9429(2002)128:7(656)
Izadjoo, F., & Shafai Bejestan, M. (2007). Corrugated bed hydraulic jump stilling basin. Journal of Applied Sciences, 7(8), 1164-1169. https://doi.org/10.3923/jas.2007.1164.1169
Abbaspour, A., Hosseinzadeh Dalir, A., Farshadizadeh, D., & Sadraddini, A.A. (2009). Effect of sinusoidal corrugated bed on hydraulic jump characteristics. Journal of Hydro-environment Research, 3(2), 109-117. https://doi.org/10.1016/j.jher.2009.05.003
Hayawi, H. A., & Mohammed A., Y. (2011). Properties of Hydraulic Jump Down Stream Sluice Gate. Research Journal of Applied Sciences, Engineering and Technology, 3(2), 81-83. https://www.researchgate.net/publication/215647334
Ashraf F., & Zhi-lin, S. (2012). Hydraulic jump basins with wedge-shaped baffles. Journal of Zhejiang Univ-Sci A (Appl Phys & Eng), 13(7), 519-525. https://doi.org/10.1631/jzus.A1200037
Gandhi, S., & Singh, R.P. (2016). Empirical Formulation of Flow Characteristics in Trapezoidal Channels. Journal of The Institution of Engineers, (India), 97(3), 247-253. https://doi.org/10.1007/s40030-016-0153-3
Ibrahim M. M. (2017). Improve the Efficiency of Stilling Basin Using Different Types of Blocks. American Journal of Engineering Research (AJER), 6(8), 295-304. https://www.researchgate.net/publication/359195975
Christopher, B., & Raphael, C. (2019). 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. Water, mdpi journal, 7 (1), 13. https://doi.org/10.3390/ECWS-3-05805
Nassrin, J., Thair J., Khalid S., & Laith S. (2020). The Effects of Different Shaped Baffle Blocks on the Energy Dissipation. Civil Engineering Journal, 6(5), 961-973. http://dx.doi.org/10.28991/cej-2020-03091521
Rasoul D., Amir G., Ali A., & Silvia F. (2020). On the Effect of Block Roughness in Ogee Spillways with Flip Buckets. Water, mdpi journal, 5 (4), 182. https://www.researchgate.net/publication/344689815
Alireza J., & Ebrahim, A.(2021). Experimental Study on the Effects of Rectangular Zigzag Blocks Geometry on Hydraulic Jump Characteristics in Trapezoidal Channel. Journal of Hydraulics, 16 (2), 31-42. https://doi.org/10.30482/jhyd.2021.261274.1496
Alfiansyah, Y., Azmeri, A., Faris, Z., Ziana, Z., & Muslem, M. (2022). An experiment of energy dissipation on USBR IV stilling basin - Alternative in modification. Journal of Water and Land Development,53(IV–VI), 68-72. https://doi.org/10.24425/jwld.2022.140781
Pillai, N.N., Kansal, M.L.(2022). Stilling Basins Using Wedge-Shaped Baffle Blocks. 9th International Symposium on Hydraulic Structures Publications, Roorkee, India. https://doi.org/10.26077/1d83-f83b
Wang, H., & Chanson, H. (2013). Free-Surface Deformation and Two-Phase Flow Measurements in Hydraulic Jumps. Research Report No. CH91/13, School of Civil Engineering, the University of Queensland, Brisbane, Australia. https://www.academia.edu/115367311/Free_Surface_Deformation_and_Two_Phase_Flow_Measurements_in_Hydraulic_Jumps
USBR. (1987). Design of Small Dams. United States Department of Interior- Bureau of Reclamation Publications, Washington, DC, USA. https://www.usbr.gov/tsc/techreferences/mands/mands-pdfs/SmallDams.pdf
Chow, V. T. (1959). Open-Channel Hydraulics. McGraw-Hill Publications, New York, USA. https://www.accessengineeringlibrary.com/binary/mheaeworks/
Novak, P., Moffat, A. I. B., Nalluri, C., & Narayanan, R. (2007). Hydraulic Structures. Taylor and Frances Publications, New York, USA. https://www.taylorfrancis.com/books/mono/10.1201/9781315274898/hydraulic-structures-novak-moffat-nalluri-narayanan
Peterka, A.J. (1978). Hydraulic Design of Stilling Basins and Energy Dissipators. United States Department of Interior—Bureau of Reclamation Publications, Denver, Colorado, USA. https://www.usbr.gov/tsc/techreferences/hydraulics_lab/pubs/EM/EM25.pdf | ||
|
آمار تعداد مشاهده مقاله: 171 تعداد دریافت فایل اصل مقاله: 53 |
||