ANALYSIS OF FLOW HYDRAULICS DURING FORCED WATER DISCHARGE THROUGH THE CHUTE OF THE NOVOTROITSK RESERVOIR EXCESS WATER CAPACITY

Authors:Litunovskiy Igor G., Tkachev Alexsandr A.

627.83
Theme: Hydraulic Engineering, Hydraulics and Engineering Hydrology
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Annotation

Purpose: to perform a hydraulic analysis of the flow in a flume under forced water flow; to draw conclusions about the discrepancy between the obtained parameters and current regulations and to justify the adopted flume design solutions to ensure the safety and durability of the structure.

Materials and methods. The study is based on the numerical integration of the differential equation of non-uniform water movement in open channels. To verify the results and demonstrate the reliability of the conclusions, the calculations were performed using two independent numerical methods: the finite difference method of V. I. Charnomskii (calculation by depth steps) and the standard steps method (calculation by length steps), calculated in a software module in the Python language.

Results. The calculations performed for a forced flow of Q = 260 m³/s showed that a type B₂ recession curve is formed in the chute. The flow rate at the end of the 159-meter-long flume reaches 15.73 m/s, and the Froude number exceeds 5.0. Shear stresses at the bottom reach 14 kPa.

Conclusions. The obtained rate and shear stress values are categorically unacceptable for the operation of a concrete hydraulic structure, as they significantly exceed its abrasion and cavitation resistance limits. These loads impact negatively the load-bearing capacity and durability of the building structures and can also lead to an emergency. The developed software module confirmed the accuracy of the calculations and can be used as a flexible tool for further alternative design.

doi: 10.31774/2712-9357-2025-15-4-353-366

Keywords

hydraulic structure, chute, hydraulic calculation, uneven flow, recession curve, numerical method, flow rate

For quoting

Litunovskiy I. G., Tkachev A. A. Analysis of flow hydraulics during forced water discharge through the chute of the Novotroitsk reservoir excess water capacity. Land Reclamation and Hydraulic Engineering. 2025;15(4):353–366. (In Russ.). https://doi.org/10.31774/2712-9357-2025-15-4-353-366.

Authors

И. Г. Литуновский – Postgraduate Student, Novocherkassk Engineering and Land Reclamation Institute named after A. K. Kortunov – branch of the Don State Agrarian University (346428, Rostov Region, Novocherkassk, Pushkinskaya Street, 111), gts_i_sm.nimi@mail.ru;

А. А. Ткачев – Head of the Department, Doctor of Technical Sciences, Associate Professor, Novocherkassk Engineering and Land Reclamation Institute named after A. K. Kortunov – branch of the Don State Agrarian University (346428, Rostov Region, Novocherkassk, Pushkinskaya Street, 111), Prof_al@mail.ru, ORCID: 0000-0002-8060-620X.

Bibliography

1. Mikhalchuk A.V., Litunovsky I.G., Solonyna I.A., Belov V.A., 2025. Aktual'nye problemy rekonstruktsii dlitel'no ekspluatiruyemykh gidrotekhnicheskikh sooruzheniy [Current problems of long-term reconstruction operated hydraulic structures]. Melioratsiya kak drayver modernizatsii APK v usloviyakh izmeneniya klimata: materialy Mezhdunar. nauchno-prakt. internet-konferentsii [Land Reclamation as a Driver of Agro-Industrial Complex Modernization in the Context of Climate Change: Proceed. of the International Scientific and Practical Internet-Conference]. Novocherkassk, Lik Publ., pp. 154-159, EDN: COQZOZ. (In Russian).

2. Tkachev A.A. [et al.], 2024. Aktual'nye voprosy prakticheskikh issledovaniy gidrotekhnicheskikh sooruzheniy: monografiya [Actual Issues of Practical Research of Hydraulic Structures: monograph]. Novocherkassk, Lik Publ., part 2, 209 p., ISBN: 978-5-907708-86-0, EDN: YZUWDT. (In Russian).

3. Litunovsky I.G., Safronov A.V., Antonov V.O., Menshikov V.I., 2023. Konstruktivnye resheniya vodosbrosnykh sooruzheniy pri rekonstruktsii malykh prudov [Design solutions for spillway structures during the reconstruction of small ponds]. Nauka i molodozh': sb. nauch. tr. Vyp. 10. Innovatsii v sovremennom agropromyshlennom komplekse [Science and Youth: Collection of Scientific Papers. Iss. 10. Innovations in the Modern Agro-Industrial Complex]. Novocherkassk, pp. 13-18, EDN: NGEPVE. (In Russian).

4. Baev O.A., Shevchenko A.V., 2022. Sovershenstvovanie konstruktivnykh resheniy vodosbrosov s tsentral'nym razmeshcheniem rybopropusknykh sooruzheniy i zakreplennoy risbermoy [Improvement of construction solutions for spillways with a central placement of fish passage and a fixed apron]. Puti povysheniya effektivnosti oroshaemogo zemledeliya [Ways of Increasing the Efficiency of Irrigated Agriculture], no. 2(86), pp. 13-21, EDN: ITEKUC. (In Russian).

5. Bubnov D.V., Bryanskaya Yu.V., 2024. Gidravlicheskiy raschot bystrotoka s razlichnymi tipami sherokhovatosti [Hydraulic calculation of a rapid flow with different types of roughness]. Gidrotekhnicheskoe stroitel'stvo [Hydrotechnical Construction], no. 10, pp. 17-22, EDN: KFESUI. (In Russian).

6. Mezin R.S., Kharlamov E.V., Andros I.A., Kuvshinchikov R.V., 2023. Tekhnicheskie resheniya pri rekonstruktsii vodosbrosnogo sooruzheniya sifonnogo tipa [Technical solutions for the reconstruction of a siphon-type spillway structure]. Melioratsiya kak drayver modernizatsii APK v usloviyakh izmeneniya klimata: materialy Mezhdunar. nauchno-prakt. internet-konferentsii [Land Reclamation as a Driver of Agro-Industrial Complex Modernization in the Context of Climate Change: Proceed. of the International Scientific and Practical Internet-Conference]. Novocherkassk, Lik Publ., pp. 104-109, EDN: AVDCTZ. (In Russian).

7. Kanyarugendo L., 2023. Otsenka vliyaniya zigzagoobraznoy sherokhovatosti na kinematicheskie parametry potoka [Evaluation of the influence of zigzag roughness on kinemaic flow parameters]. Prirodoobustroystvo [Environmental Engineering], no. 3, pp. 85-91, DOI: 10.26897/1997-6011-2023-3-85-91, EDN: UHBWNT. (In Russian).

8. Li Sh., Zhang Ji., Nie Ji., Peng Y., 2014. Energy dissipation and flow characteristics of baffles and sills on stepped spillways. Journal of Hydraulic Research, vol. 52, no. 1, pp. 140-143, DOI: 10.1080/00221686.2013.856040.

9. Sudol'skiy G.A., 2020. Gidravlicheskoe obosnovanie skhemy gasheniya energii s pomoshch'yu diafragm na trakte stroitel'no-ekspluatatsionnogo vodosbrosa Pskemskoy GES [Hydraulic justification of the scheme of energy dissipation using orifices plates on the construction and operational tunnel of the Pskem HPP]. Gidrotekhnicheskoe stroitel'stvo [Power Technology and Engineering], no. 9, pp. 5-15, EDN: JZYYQA. (In Russian).

10. Bubnov D.V., Bryanskaya Yu.V., 2024. Raschot bystrotoka s usilennoy sherokhovatost'yu [Calculation of fast current with increased roughness]. Izvestiya Vserossiyskogo nauchno-issledovatel'skogo instituta gidrotekhniki im. B. Ye. Vedeneeva [Bullet. of the All-Russian Research Institute of Hydraulic Engineering named after B. E. Vedeneyev], vol. 312, pp. 3-12, EDN: ERPGTF. (In Russian).

11. Blanc P., Lempérière F., 2001. Labyrinth spillways have a promising future. Hydropower & Dams, vol. 8, iss. 4, pp. 129-131.

12. Tabbara M., Chatila J., Awwad R., 2005. Computational simulation of flow over stepped spillways. Computers & Structures, vol. 83, iss. 27, pp. 2215-2224, ISSN: 0045-7949, DOI: 10.1016/j.compstruc.2005.04.005.