Relationships and Mechanisms of Sand Grain Promotion on Nozzle Cavitation Flow Evolution: A Numerical Simulation Investigation

  • HAN Xiangdong ,
  • XIAO Jingping ,
  • YU Fangyan ,
  • ZHAO Weiguo
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  • 1. Aerospace Technology Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China
    2. School of Civil Engineering, Nanchang Institute of Technology, Nanchang 330044, China
    3. College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China

Online published: 2023-12-04

Supported by

This work was financially supported by China Postdoctoral Science Foundation (2021MD703972), the National Key Research and Development Program of China (No. 2018YFC0808400), National Natural Science Foundation of China (No. 52074194), and the National Key Basic Research Program of China (No. 2014CB239203).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

Abstract

The objective of this study was to primarily investigate the effects of sand grains with different mean diameters and concentrations on cavitation flow development in a nozzle. One new solid-liquid-vapor three-phase coupling numerical method was presented and a cavitation model was changed to perform numerical simulations. Results indicated that sand grain-pure water-cavitation flow (SG-PW-CF) vapor contents were greater than in pure water-cavitation flow (PW-CF). Sand grains were found to promote cavitation flow development, with the concentration promotion range becoming smaller with increased mean diameter. The mechanisms for these effects were explored and revealed as well. In SG-PW-CF, cavitation nuclei number was greater and tensile stress was also greater than in PW-CF. The maximum and absolute minimum slip velocities and maximum and minimum turbulent kinetic energies of SG-PW-CF were greater than in PW-CF. These effects on SG-PW-CF evolution were large, involving primary factors. The calculated magnitude of the Saffman lift force in SG-PW-CF was small (10–2), with its effects relatively weak and it was thus a secondary factor. Effects of variations of flow fields were more significant than force changes. In SG-PW-CF, variations of a single parameter with the concentration could not reflect the alternating relationships of vapor content with the concentration. Indeed, it was a combination of variations of all parameters.

Cite this article

HAN Xiangdong , XIAO Jingping , YU Fangyan , ZHAO Weiguo . Relationships and Mechanisms of Sand Grain Promotion on Nozzle Cavitation Flow Evolution: A Numerical Simulation Investigation[J]. Journal of Thermal Science, 2022 , 31(6) : 2385 -2410 . DOI: 10.1007/s11630-022-1568-y

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