THERMAL SCIENCE

International Scientific Journal

PARAMETER OPTIMIZATION OF ANTI CRYSTALLIZATION FLOCKING DRAINAGE PIPE BASED ON FLOW FIELD DISTRIBUTION CHARACTERISTICS

ABSTRACT
The crystal plugging of tunnel drainage pipe seriously affects the safe and normal use of the tunnel. In order to obtain the mechanism of flocking drainage pipe anti crystal plugging based on the characteristics of flow field distribution, numerical simulation was used to optimize the parameters of flocking drainage pipe. The results show that: with the existence of fluff, the velocity in the lower part of the drainage pipe decreases by about 50%, and the velocity in the upper part increases by about 25~50%. With the increase of the length of fluff, the velocity funnel between fluffs gradually increases, the velocity distribution at the bottom of the funnel is basically unchanged, and the velocity in the upper part gradually increases. The velocity in the upper part of the flocked drainage pipe fluctuates above the fluff to a certain extent. The flow velocity in the lower part of the drainage pipe forms a flow velocity ladder in the longitudinal direction of the villus, and the width of the ladder is about 2/3 of the longitudinal spacing of the villus. The optimized parameters of 3-D flow field of flocked drainage pipe are helpful to the further improvement of indoor test, and provide theoretical basis for the mechanism of preventing crystal blockage of flocked drainage pipe.
KEYWORDS
PAPER SUBMITTED: 2021-01-04
PAPER REVISED: 2021-07-10
PAPER ACCEPTED: 2021-07-12
PUBLISHED ONLINE: 2021-10-17
DOI REFERENCE: https://doi.org/10.2298/TSCI2106091L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 6, PAGES [4091 - 4098]
REFERENCES
  1. Duan, H., et al., The Phenomenon of Crystal Pipe Blocking in Karst Tunnel and its Induced Risk, China Civil Engineering Journal, 53 (2020), S1, pp. 332-335
  2. Zhou, Y., et al., Experimental Study on Prevention of Calcium Carbonate Crystallizing in Drainage Pipe of Tunnel Engineering, Advances in Civil Engineering, 2018 (2018), ID9430517
  3. Jiang, Y., et al., Experimental Research on Maintainability of Drainage Facilities in Lining Construction Joints of Karst Tunnel, Railway Standard Design, 63 (2019), 11, pp. 91-96
  4. Tian, C., et al., On Mechanism of Crystal Blockage of Tunnel Drainage System and Preventive Coun-termeasures, Modern Tunneling Technology, 57 (2020), 05, pp. 66-76+83
  5. Guo, X. Crystallization Mechanism and Countermeasures of Drainage System for Railway Tunnel, China Railway Science, 41 (2020), 01, pp. 71-77
  6. Zhao, P., et al., Research and Application of Dredge Equipment for Drainage Pipeline in Railway Tunnel, Railway Engineering, 58 (2018), 01, pp. 30-32+66
  7. Hong, Y., et al., On Scavenging Performances of Cleaning Solvents for the Clogging in the Drainage System of Karst Tunnels. Modern Tunneling Technology, 57 (2020), 06, pp. 160-170
  8. Liu, S., et al., The Effect of Flocking PVC Pipe on the Prevention and Crystallization of Tunnel Drains, Science Technology and Engineering, 18 (2018), 21, pp. 313-319
  9. Liu, S., et al., The Effect of Anti-Crystallization of Tunnel Plumage Drainpipe Under Different Water Filling State, Science Technology and Engineering, 18 (2018), 28, pp. 156-163
  10. Liu, S., et al., Effect of Fuzz Length on the Prevention of Crystallization of Tunnel Flocking Drainpipes, Science Technology and Engineering, 19 (2019), 09, pp. 234-239
  11. Liu, S., et al., Experimental Study on Anti‐Crystallization Law of Tunnel Transverse Flocking Drainpipe at Different Velocities, Asia Pacific Journal of Chemical Engineering, 15 (2020), S1, e2470
  12. Liu, S., et al., Two-Dimensional Flow Field Distribution Characteristics of Flocking Drainage Pipes in Tunnel, Open Physics, 18 (2020), 01, pp. 139-148
  13. Ruz, O., et al., Numerical Study of the Effect of Blockage Ratio on the Flow Past One and Two Cylinders in Tandem for Different Power-Law Fluids, Applied Mathematical Modelling, 89 (2021), 2, pp. 1640-1662
  14. Ji, C., et al., Direct Numerical Simulations of Horizontally Oblique Flows Past Three-Dimensional Circular Cylinder Near a Plane Boundary, Journal of Offshore Mechanics and Arctic Engineering, 142 (2020), 05, pp. 1-10
  15. Yanovych, V., et al., Structure Turbulent Flow Behind a Square Cylinder with an Angle of Incidence, European Journal of Mechanics - B/Fluids, 85 (2021), Jan.-Feb., pp. 110-123
  16. Devaki, P., et al., Wall Properties and Slip Consequences on Peristaltic Transport of a Casson Liquid in a Flexible Channel with Heat Transfer, Applied Mathematics and Nonlinear Sciences, 03 (2018), 1, pp. 277-290
  17. Selvi, C. K., Srinivas, A. N. S., Oscillatory Flow of a Casson Fluid in an Elastic Tube with Variable Cross Section, Applied Mathematics and Nonlinear Sciences, 03 (2018), 2, pp. 571-582

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence