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Performance improvement prediction of push chain moist-mix concrete spraying machine employing orifice plate

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An Erratum to this article was published on 02 November 2022

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Abstract

Push chain moist-mix concrete spraying machine is widely used in shotcrete construction processes, but shotcrete surplus has always been the main problem affecting work efficiency. To improve the efficiency, the orifice plate is employed in the discharge cylinder, considering three different distributions (equal, left concentrated and both side distribution) of the holes and two hole diameters (6 mm and 8 mm). In different orifice plate, the discharge cylinder flow field is studied employing the FLUENT software by the computational fluid dynamic method. Besides, dimensionless evaluation index of the discharge cylinder flow field is defined based on the force of particles. By comparing dimensionless index and velocity vector, the best orifice plate (both side distribution and 8 mm) is presented. Compared without orifice plate, the experiment showed the shotcrete surplus ability is reduced by 26 %–87 %. This study provides guidance for the design and optimization of pneumatic conveying equipment.

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Abbreviations

S m :

Mass added to the continuous phase

\(\mathop {\mathop {\mathop \rho \limits_ \to }\limits_ \to }\limits_ \to \) :

Fluid density

vi :

Fluid velocity

T :

Stress tensor

\({\boldsymbol{\vec F}}\) :

Gravitational body force and external body forces

μ :

Molecular viscosity

I :

Unit tensor

G k :

Generation of turbulence kinetic energy

G b :

Generation of turbulence kinetic energy due to buoyancy

Y M :

Contribution of the fluctuating dilatation in compressible turbulence to the overall dissipation rate

X :

Horizontal displacement

v x :

Particles horizontal velocity

t :

Movement time in the discharge cylinder

Y :

Vertical displacement

C Pv :

Point velocity constant

\({C_{Pgv}}\) :

Point velocity gradient constant

C Sv :

Surface (plane) velocity constant

C Sgv :

Surface (plane) velocity gradient constant

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Acknowledgments

This work was supported by National Natural Science Foundation of China (No.51974177); Natural Science Foundation of Shandong Province (No.ZR2019QEE007).

Author information

Authors and Affiliations

  1. College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao, 266590, China

    Lianjun Chen, Hui Ma & Guanguo Ma

  2. State Key Laboratory of Mining Disaster Prevention and Control co-founded by Shandong Province and Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China

    Lianjun Chen

  3. College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China

    Gang Pan, Pengcheng Li & Zhenjiao Sun

Authors
  1. Lianjun Chen
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  2. Hui Ma
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  4. Gang Pan
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Corresponding author

Correspondence to Gang Pan.

Additional information

Gang Pan received his Ph.D. in Engineering from College of Safety and Environmental Engineering, Shandong University of Science and Technology. He is currently an Assistant Professor. He presided over the China-Czech Republic government science and technology regular exchange project. He was awarded the Second Prize of Science and Technology Progress Award of Ministry of Education, Second Prize of Science and Technology Progress Award of Ministry of Education, Second Prize of Science and Technology Progress Award of Shandong Province and First Prize of Science and Technology Progress Award of China Coal Industry Association. His research interests include equipment and technology of mine concrete spray support material.

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Chen, L., Ma, H., Ma, G. et al. Performance improvement prediction of push chain moist-mix concrete spraying machine employing orifice plate. J Mech Sci Technol 36, 2889–2901 (2022). https://doi.org/10.1007/s12206-022-0521-z

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  • DOI: https://doi.org/10.1007/s12206-022-0521-z

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