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Numerical simulation of parafoil inflation process based on fluid-structure interaction methodChinese Full TextEnglish Full Text (MT)

ZHANG Siyu;YU Li;LIU Xin;Key Laboratory of Aircraft Environment Control and Life Support, MIIT, Nanjing University of Aeronautics and Astronautics;College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics;

Abstract: To study the fluid-structure interaction dynamic characteristics of rammed parafoil during inflating process, a folding model of rammed parafoil with multi-chamber was established based on the theory of free form deformation. The time-step updating technique was used to make fluid field move with the movement of the parafoil system. The nonlinear dynamics numerical calculation was carried out with Arbitrary Lagrange-Euler(ALE) method during the unsteady parafoil inflation process. The numerical results are in good agreement with the airdrop test results. The three-dimensional shape and unsteady flow field distribution indicate that there exists a wake recontact phenomenon with "tip warping and central depression" due to the tip vortex during parafoil inflation process. The inflatable law of each chamber is symmetrical with respect to the central chamber. The dynamic variation law of parafoil aerodynamic characteristics is analyzed and the glide ratio is stable at 2.24 after inflation. The conclusions provide a theoretical basis for parafoil design and inflation performance prediction.
  • DOI:

    10.13700/j.bh.1001-5965.2019.0408

  • Series:

    (C) Architecture/ Energy/ Traffic/ Electromechanics, etc

  • Subject:

    Aeronautics and Astronautics Science and Engineering

  • Classification Code:

    V244.21

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