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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.9

ISSN Imprimir: 2152-5102
ISSN On-line: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v31.i1.30
8 pages

Numerical Simulation of Turbulent Underexpanded Jet

Mohamed Si-Ameur
Laboratory of Geophysical and Industrial Flows B. P. 53X, 38041 Grenoble Cedex, France

RESUMO

The evolution with time and space of hot gas (NOx, CO2, air) in exhaust underexpanded jet is studied by numerical simulations. The jet at the nozzle exit is at Mach number Mj = 1, the ambient flow corresponds to an homogeneous base state environment. This test case is considered to analyze turbulent motion responsible for gas mixing with ambient air. Longitudinal streamwise Taylor−Görtler eddies in mildly underexpanded jet are identified in our flow visualizations. A complete transition to turbulent flow is reached thanks to Monotone Integrated Large Eddy Simulation (MILES) approach. Computed statistics are in good agreement with experimental measurements.


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