Volume 34 Issue 5
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Characteristics investigation on supersonic inlet buzz with dynamic mode decomposition method[J]. Journal of Aerospace Power, 2019, 34(5): 1076-1084. doi: 10.13224/j.cnki.jasp.2019.05.013
Citation: Characteristics investigation on supersonic inlet buzz with dynamic mode decomposition method[J]. Journal of Aerospace Power, 2019, 34(5): 1076-1084. doi: 10.13224/j.cnki.jasp.2019.05.013
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Characteristics investigation on supersonic inlet buzz with dynamic mode decomposition method

doi: 10.13224/j.cnki.jasp.2019.05.013
  • Received Date: 2018-09-14
  • Publish Date: 2019-05-28
    Abstract
  • Buzz phenomena of a typical supersonic inlet were studied with numerical simulations. The dynamic mode decomposition (DMD) method was introduced to analyze the flow characteristics of the little buzz and big buzz. The first order dynamic mode reflected the time-averaged flow field characteristics, and the second order dynamic mode showed the flow field features of the main frequency oscillation. In addition, the research on the relationship between little buzz and big buzz reveals that the flow of little buzz contains the oscillation characteristics of the big buzz, and little buzz regime is a transitional state from the steady flow field to the big buzz regime. During the evolution from the little buzz to the big buzz, some flow structures in the inlet are gradually weakened and tend to be stable, hence the overall flow field of the big buzz is more stable than that of the little buzz.

     

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