Self-sustained oscillation for compressible cylindrical cavity flows

Kung Ming CHUNG, Kuan Huang LEE, Keh Chin CHANG

研究成果: Article同行評審

3 引文 斯高帕斯(Scopus)


The presence of a cavity changes the mean and fluctuating pressure distributions. Similarities are observed between a cylindrical cavity and a rectangular cavity for a compressible flow. The type of cavity flow field depends on the diameter-to-depth ratio and the length-to-depth ratio. The feedback loop is responsible for the generation of discrete acoustic tones. In this study, the self-sustained oscillation for a compressible cylindrical cavity flow was investigated experimentally. For open-type cavities, the power spectra show that the strength of resonance depends on the diameter-to-depth ratio (4.43–43.0) and the incoming boundary layer thickness-to-depth ratio (0.72–7.0). The effective streamwise length is used as the characteristic length to estimate the Strouhal number. At higher modes, there is a large deviation from Rossiter's formula for rectangular cavities. The gradient-based searching method was used to evaluate the values of the empirical parameters. Less phase lag and a lower convection velocity are observed.

頁(從 - 到)1294-1299
期刊Chinese Journal of Aeronautics
出版狀態Published - 2017 8月

All Science Journal Classification (ASJC) codes

  • 航空工程
  • 機械工業


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