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Non-zero time-averaged thermoacoustic effects, linear or nonlinear?

Author(s) : LUO E. C.

Summary

N. Rott, et al. have developed a so-called linear thermoacoustic theory (LTAT) to explain nonzero, time-averaged thermoacoustic effects under acoustical approximation assumption. However, two important facts, which are given in the main text of this paper, have been a shortcoming of the LTAT for a long time. Here, the author proposes a distinguished viewpoint: that is, the nonzero, time-averaged thermoacoustic effects are basically nonlinear. With this new recognition, the author solves the two shortcomings encountered by the LTAT. Then, a framework of weakly nonlinear thermoacoustic theory is developed. For strongly nonlinear thermoacoustic systems, the full computational fluid dynamics method is a more powerful and feasible theoretical tool.

Details

  • Original title: Non-zero time-averaged thermoacoustic effects, linear or nonlinear?
  • Record ID : 2008-1074
  • Languages: English
  • Subject: General information
  • Publication date: 2006/06/14
  • Source: Source: Proc. 14th int. Cryocooler Conf., Annapolis, MD
    195-203; fig.; 11 ref.

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