DOI 10/35776/MNP.2019.09.09
UDC 628.2+532.54

Dezhina I. S., Orlov V. А., Zotkin S. P.

The study of the surface texture of pipes with the purpose
of increasing their transporting capacity

Summary

The results of exploratory research on the transportation of water and sand in specially designed laboratory and work benches including a platform with replaceable modular polymer elements (troughs) with artificial roughness are presented. The methodology of experiments on large benches with modular piped elements using photo- and film equipment as well as devices for determining velocity, filling and slope is presented. The nature of the turbulence zones with a different texture of the inner surfaces of the troughs in the form of obstructions of different height is revealed. The results of hydraulic experiments are presented in two modes: single-phase (water without foreign inclusions) and two-phase (water mixed with sand of different fractional composition). According to the results of experimental studies the areas of effective operation of modular troughs for sand transportation for various textures of artificial roughness of pipes of sewer systems were identified. The expediency of using corrugated inner walls of pipelines transporting wastewater for the efficient removal of sand belts settled on the bottom and walls of the pipes is substantiated.

Key words

simulation , transporting capacity , gravity sewers , artificial pipe roughness , microturbulence

Скачать/download (PDF) free access

The further text is accessible on a paid subscription.
For authorisation enter the login/password.
Or subscribe

REFERENCES

1. Danielson T. J. Sand transport modeling in multiphase pipelines. International Offshore Technology Conference, 30 April – 3 May 2007, Toronto.
2. Arolla S. K., Desjardins O. Transport modeling of sedimenting particles in a turbulent pipe flow using Euler-Lagrange large eddy simulation. International Journal of Multiphase Flow, 2015, no. 25, pp. 734–750.
3. Church M. Bed material transport and the morphology of alluvial river channels. Annual Review of Earth and Planetary Sciences, 2006, no. 34 (1), p. 325–354.
4. Iufin A. P. Gidromekhanizatsiia [Hydraulic excavation. Мoscow, Stroiizdat Publ., 1974, 223 p.].
5. Kuliczkowski A. Rury kanalizacyjne, Wydawnictwo Politechniki Swietokrzyskiej, 2004, 507 р.
6. Dancey C. L., Diplas P., Papanicolaou A, Bala M. Probability of individual grain movement and threshold condition. Journal of Engineering, 2002, no. 128 (2), pp. 1069–1075.
7. Ebtehaj I., Bonakdari H. Comparison of genetic algorithm and imperialist competitive algorithms in predicting bed load transport in clean pipe. Water Science Technology, 2014, no. 70 (10), pp. 695–701.
8. Grossmann S., Lohse D. Curvature effects on the velocity profile in turbulent pipe flow. European physical journal, 2017, no. 40, pp. 294–299.
9. Santiago A., Durango M. Most advanced technology for pipeline inspection in the world: see, measure and navigate in 3D through pipes and manholes. International Conference and Exhibition NO-DIG 2012, Sao Paulo (Brasil).
10. Ahern E. Non-invasive rehabilitation technologies. 30 NO-DIG International Conference and Exhibition, Sydney (Australia), 2013, paper 2–20, pp. 1–9.
11. Greaves G. N., Greer A. L., Lakes R. S., Rouxel T. Poisson’s ratio and modern materials. Journal Nature Materials, 2011, v. 10, pp. 823–837.
12. Rabmer-Koller U. No-dig technologies – innovative solution for efficient and fast pipe rehabilitation. 29 NO-DIG International Conference and Exhibition, NO-DIG Berlin 2011, paper 2C-1, pp. 1–10.
13. Janssen A. Importance of lateral structural repair of lateral lines simultaneously with main line CIPP rehabilitation. 30 NO-DIG International Conference and Exhibition, 2012, Sao Paulo (Brasil), PAP 012287, pp. 1–9.
14. Dulin V. M., Kozorezov Iu. S., Markovich D. M. [Estimation of the dissipation rate of turbulent kinetic energy in a free-stream flow from PIV measurements]. Vestnik NGU. Seriia Fizika, 2012, v. 7, pp. 53–69. (In Russian).
15. Girgidov A. D. [Change in energy dissipation during the transition from laminar to turbulent mode]. Inzhenerno-Stroitel’nyi Zhurnal, 2011, no. 5 (23), pp. 49–52. (In Russian).
16. Orlov V. A., Dezhina I. S., Pelipenko A. A., Orlov E. V. [Pat. 176330, RF. IPC C08J 7/00. Test bench for studying the fluid flow by optical means in open flumes with different reliefs of their inner surface]. Izobreteniia. Poleznye Modeli, 2018, no. 2. (In Russian).