Volume 37 Issue 1
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LU Weiyu, HUANG Guoping, YANG Yuxuan. Coupling model of self- and external-excitation for phenomena in pulsed jet flow control[J]. Journal of Aerospace Power, 2022, 37(1): 181-190. doi: 10.13224/j.cnki.jasp.20210069
Citation: LU Weiyu, HUANG Guoping, YANG Yuxuan. Coupling model of self- and external-excitation for phenomena in pulsed jet flow control[J]. Journal of Aerospace Power, 2022, 37(1): 181-190. doi: 10.13224/j.cnki.jasp.20210069
shu

Coupling model of self- and external-excitation for phenomena in pulsed jet flow control

doi: 10.13224/j.cnki.jasp.20210069
  • 1.

    School of Physical and Mathematical Sciences，Nanjing Tech University，Nanjing 211800，China

  • 2.

    College of Energy and Power Engineering，Nanjing University of Aeronautics and Astronautics，Nanjing 210016，China

  • Received Date: 2021-02-17
  • Publish Date: 2022-01-28
    Abstract
  • In order to explain four phenomena such as frequency-dependent，position-dependent，synchronization and intensity-dependent effects in pulsed jet flow control，a simplified coupling model of self- and external- excitation was established to approximately describe pulsed jet flow control based on the flow stability theory with weak nonlinearity.Composed of two partial differential equations，the model can be simplified as ordinary differential equations for solution in particular cases.By comparing the model results with those from numerical simulation and experiment of pulsed jet flow control，it can be found that the coupling model can qualitatively or semi-quantitatively reflect the four phenomena in actual pulsed jet flow control.Further analysis of the model showed that the pulsed jet mainly used the nonlinear flow instability mechanism to promote the momentum transfer between the main flow and the separated flow by making the flow field synchronize with unsteady excitation.As a result of self- and external- excitation coupling，flow control effects were realized and four typical and unique phenomena were presented.

     

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