Volume 38 Issue 3
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LIN Wei, ZHENG Shuihua, CHAI Min, et al. Numerical simulation of liquid sheet breakup process and structures in gas-liquid pintle injector[J]. Journal of Aerospace Power, 2023, 38（3）：618-629 doi: 10.13224/j.cnki.jasp.20210514
Citation: LIN Wei, ZHENG Shuihua, CHAI Min, et al. Numerical simulation of liquid sheet breakup process and structures in gas-liquid pintle injector[J]. Journal of Aerospace Power, 2023, 38（3）：618-629 doi: 10.13224/j.cnki.jasp.20210514
shu

Numerical simulation of liquid sheet breakup process and structures in gas-liquid pintle injector

doi: 10.13224/j.cnki.jasp.20210514
  • 1.

    College of Mechanical Engineering， Zhejiang University of Technology，Hangzhou 310023，China

  • 2.

    School of Aeronautics and Astronautics，Zhejiang University，Hangzhou 310027，China

  • Received Date: 2021-09-14
    Available Online: 2022-11-22
    Abstract

  • Numerical simulations of the primary atomization in the gas-liquid pintle injector were conducted, using the VOF (volume of fraction) method with the adaptive mesh refinement to capture the gas-liquid interface. The realizable k-ε turbulence model was adopted for the turbulence modelling. The entire breakup process and the gas-liquid interaction at different instants were captured. The numerical results were qualitatively and quantitatively in good agreement with the high-speed photograph measurement results, which verified the accuracy of the numerical method. The breakup process and mechanism of the primary breakup and atomization were studied by analyzing the evolution of the gas-liquid interface, the vortex structure of the flow field and the velocity field in the pintle injector. The results showed that the formation of the liquid bridge was mainly caused by the expansion, stretching and coalescence of the liquid hole, while the droplet was mainly caused by the stretching of the central liquid sheet, the fractures of the liquid ligament and liquid bridge. The fracture and displacement of liquid sheet was mainly attributed to the vortex structure formed in the liquid sheet breaking stage.

     

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