Nonlinearly unstable waves dominated by entropy mode

W. S. Yoon, T. J. Chung

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


This paper is concerned with instability of flow fields which are dominated by the entropy mode with the presence of usual acoustic and vortical modes. These combined modes lead to nonlinear unstable waves which may occur in automobile, aircraft, or rocket engines. In this study instability in a side-burning rocket is investigated. It is shown that the energy growth rate parameters increase with an increase of the energy growth factor. The energy growth rate parameters for turbulent flows are larger than those for laminar flows. It is further shown that unstable wave motions for the high-temperature side-burning rocket are dictated mostly by the entropy mode, somewhat by the vortical mode, and least by the acoustic mode.

Original languageEnglish
Pages (from-to)1096-1103
Number of pages8
JournalJournal of the Acoustical Society of America
Issue number2
Publication statusPublished - 1994 Aug

All Science Journal Classification (ASJC) codes

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics


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