Volume 33 Issue 12
Dec.  2018
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Effects of thermodynamic on unsteady cavitation flow of liquid hydrogen[J]. Journal of Aerospace Power, 2018, 33(12). doi: 10.13224/j.cnki.jasp.2018.12.007
Citation: Effects of thermodynamic on unsteady cavitation flow of liquid hydrogen[J]. Journal of Aerospace Power, 2018, 33(12). doi: 10.13224/j.cnki.jasp.2018.12.007

Effects of thermodynamic on unsteady cavitation flow of liquid hydrogen

doi: 10.13224/j.cnki.jasp.2018.12.007
  • Received Date: 2017-10-19
  • Publish Date: 2018-12-28
  • In order to investigate the effects of thermodynamics on the unsteady cavitation flow of cryogenic fluid, the unsteady cavitation flow of the liquid-hydrogen around the Ogive body was studied by using the large eddy simulation under thermodynamics and isothermy. The results showed that the thermodynamics prolonged the cavitation period of liquid hydrogen, enhanced the unsteady characteristics and suppressed the cavitation. In addition, compared with isothermy, the cavitation in thermodynamics containd finer bubbles. A temperature depression about 1.5K was detected because of thermodynamics. Besides, the vortex structure moved from the cavity interface to the inner of the cavity due to the thermodynamics. The interaction between cavitation and vortex structure was also studied based on the vorticity transfer equation under thermodynamics and isothermy. In thermodynamics, the vortex stretching term is mainly located at the front and the end of the cavity, and the vortex dilation term and baroclinic torque term are mainly located inside the cavity. In isothermy, the vortex stretching term and vortex dilation term are mainly located at the interface of cavity, and the baroclinic torque term is located at the end of cavity.

     

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