Volume 30 Issue 7
Jul.  2015
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WANG Cong-lei, SUN Jian-hong, XU Chang-yue, HOU Bin. Flow field of cylindrical membrane inflation under the fluid-structure interaction[J]. Journal of Aerospace Power, 2015, 30(7): 1661-1669. doi: 10.13224/j.cnki.jasp.2015.07.018
Citation: WANG Cong-lei, SUN Jian-hong, XU Chang-yue, HOU Bin. Flow field of cylindrical membrane inflation under the fluid-structure interaction[J]. Journal of Aerospace Power, 2015, 30(7): 1661-1669. doi: 10.13224/j.cnki.jasp.2015.07.018

Flow field of cylindrical membrane inflation under the fluid-structure interaction

doi: 10.13224/j.cnki.jasp.2015.07.018
  • Received Date: 2014-11-05
  • Publish Date: 2015-07-28
  • Numerical research on the flow field characteristics of the cylindrical membrane inflation was performed by the Euler-Lagrangian method. The results show that bumps are formed at two ends of the cylindrical membrane, swinging vertically during the inflation within inlet velocity range (50-90m/s) and inlet pressure range (1.0-1.4MPa). With the analysis on the flow structure, vorticity transportation and the mechanism of vortex/shock interaction in the flow field inside the cylindrical membrane, it is found that there is a cured shock adjacent to the inlet tube, making flow deflection. Vortexes formed by the deflected flow interact with shock, resulting in local supersonic zones. Based on the discussion about cylindrical membrane stress distribution, the local stress concentrations at the top and two ends of the cylindrical membrane are considered as important factors influencing the safety and stability. Comparing the results of different inlet pressures and velocities, it is found that the influence on safety caused by the inlet velocity is less than the inlet pressure, and the influence on stability caused by the inlet velocity is greater than the inlet pressure.

     

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