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Numerical Simulation and Experimental Study on High-Pressure Water Jet Descaling in Coal Mine Drainage Pipeline

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Iranian Journal of Science and Technology, Transactions of Mechanical Engineering Aims and scope Submit manuscript

Abstract

Traditional chemical and mechanical descaling methods are expensive, inefficient and environmental pollution for removing scales in coal mine main drainage pipeline. In this study, a water jet is proposed to remove pipe scales, which can solve the inadequacies of traditional methods. Parametric optimization for water jet and descaling nozzle are analyzed. Firstly, the mechanical properties of scale materials are obtained for the first time by uniaxial compressive tests and Brazilian disk splitting tests. Secondly, crushing mechanism and crushing effect of pipe scale subjected to water jet are studied by AUTODYN software. Relationship between the nozzle’s key structure parameters and the axial static pressure and velocity of the fluid field inside the nozzle are analyzed by Fluent software. Moreover, the axial dynamic pressure and velocity of fluid field outside the nozzle are also analyzed. The above numerical simulations indicate that the pressure, flow and target distance of water jet should be 20 MPa, 40L/min and 50 mm, respectively; the outlet diameter, contraction angle and length-diameter ratio of the nozzle should be 2 mm, 13°and 2, respectively. Finally, experiments are conducted for the validation of these parameters. The results provide guidance for the development of the water jet descaling technique of the coal mine drainage pipeline.

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Acknowledgments

The authors would like to thank for the supports of all the fundings.

Funding

“This research was funded and supported by the Fundamental Research Funds for the Central Universities (grant number 8000150A084) and the Yue Qi Distinguished Scholar Project, China University of Mining & Technology, Bei**g and National key research and development program of China (grant number 2016YFC0600900).

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Authors and Affiliations

  1. School of Mechanical Electronic & Information Engineering, China University of Mining & Technology (Bei**g), D11 Xueyuan Road, Haidian, Bei**g, 100083, China

    Aiming Wang, Baomei He, Guoying Meng, Jie Yang & **aohan Cheng

  2. Fengtai District, Bei**g National Railway Research & Design Institute of Signal & Communication Co, Ltd. Building No.18, Huayuan Yili, Bei**g, 100073, China

    Pengfei Sun

  3. China North Engine Research Institute, Beichen District, 96 Yong** Road, Tian**, 300400, China

    Ziwei Zhang

Authors
  1. Aiming Wang
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  2. Pengfei Sun
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  3. Ziwei Zhang
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  4. Baomei He
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  5. Guoying Meng
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  6. Jie Yang
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  7. **aohan Cheng
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Contributions

All authors discussed and agreed upon the idea and made scientific contributions. A.W. and G.M. conceived the original idea and designed the simulations and experiments. A.W., P.S. and Z. Z. conducted the numerical simulations. A.W. wrote the paper. P.S., Z. Z., B. H., J. Y. and X. H. conducted the experiments.

Corresponding author

Correspondence to Aiming Wang.

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Wang, A., Sun, P., Zhang, Z. et al. Numerical Simulation and Experimental Study on High-Pressure Water Jet Descaling in Coal Mine Drainage Pipeline. Iran J Sci Technol Trans Mech Eng 46, 113–130 (2022). https://doi.org/10.1007/s40997-020-00408-y

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  • DOI: https://doi.org/10.1007/s40997-020-00408-y

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