Open AccessNon-Normal Global Modes of High-Speed Jets
Author(s) -
Joseph W. Nichols,
Sanjiva K. Lele
Publication year - 2011
Publication title -
international journal of spray and combustion dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 16
eISSN - 1756-8285
pISSN - 1756-8277
DOI - 10.1260/1756-8277.3.4.285
Subject(s) - mach number , superposition principle , physics , jet (fluid) , transient (computer programming) , mode (computer interface) , mechanics , range (aeronautics) , normality , normal mode , dynamic mode decomposition , computational physics , mathematics , aerospace engineering , computer science , acoustics , statistics , quantum mechanics , engineering , vibration , operating system
Global mode decomposition is applied to high speed jets over a range of jet-to-ambient density ratios and Mach numbers. Maximal transient response was obtained for each system by computing an optimal superposition of non-normal global modes. The non-normality of the global modes increased with decreasing density ratio as well as decreasing Mach number