Volume 26 Issue 5
May  2011
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LI Lei, SUN Xiao-feng. Three-dimensional thermoacoustic instability model based on spectral method[J]. Journal of Aerospace Power, 2011, 26(5): 1017-1024.
Citation: LI Lei, SUN Xiao-feng. Three-dimensional thermoacoustic instability model based on spectral method[J]. Journal of Aerospace Power, 2011, 26(5): 1017-1024.

Three-dimensional thermoacoustic instability model based on spectral method

  • Received Date: 2010-12-08
  • Rev Recd Date: 2011-03-24
  • Publish Date: 2011-05-28
  • In order to investigate the effect of circumferential non-uniform fluid parameters and heat release on thermoacoustic instabilities, Chebyshev method was applied to axial and radial directions and Fourier method was applied to circumferential direction in the linear Euler equations. Resonant frequencies and acoustic fields of a duct were obtained by this method for validation and further investigations. At last, after some calculation for circumferential non-uniform heat release, it is verified that some symmetrical circumferential non-uniform conditions can be simplified to uniform conditions. But this approximation would bring errors if the circumferential non-uniform distribution is strong in case of asymmetrical distribution.

     

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