A Timeline of Jet Instability Research
A chronological and topological review of past and recent progress in the analysis of jet instability
Editor
Lutz Lesshafft
Global modes and transient response of a cold supersonic jet (2011)
JOSEPH W. NICHOLS, SANJIVA K. LELE
Nichols & Lele present the first truly global linear eigenmode calculations for jets. The paper is short, in the JFM fast track format, and therefore focuses on one single configuration, at Mach number 2.5 and Reynolds number 3600. Similar results for other Mach numbers (>=0.9) and temperature ratios can be found in a companion paper (Nichols & Lele, Int. J. Spray Combust. Dyn. 2011).
The spectrum features two families of eigenmodes, one related to shear instability and box resonance, the other related to a mechanism described by Tam & Hu. The optimal perturbation flow response (temporal SVD) in the jet is computed, and shown to involve only shear instability phenomena.
Subjects
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