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Início - ICHMT DL Ano atual Arquivos Comitê executivo Centro Internacional para Transferência de Calor e Massa

Large Eddy Simulation of Supersonic Jet Plumes from Rectangular Con-Di Nozzles

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.1840
pages 1798-1808

P. C. Wang
Dept. Of Aero. & Auto. Eng., Loughborough Univ., Leicestershire, LE11 3TU, United Kingdom

James J. McGuirk
Department of Aeronautical and Automotive Engineering, Loughborough University, Leicestershire, United Kingdom


A Large Eddy Simulation investigation is described for a supersonic jet discharging from a rectangular convergent-divergent nozzle at Nozzle Pressure Ratios (NPRs) typical of military aircraft propulsion. Accurate inlet conditions and Sub-Grid Scale modelling, as well as appropriate mesh design are essential for good LES predictions. The present work adopts an LES inlet condition generation method based on a rescaling/recycling method (R2M) and the Piomelli and Guerts SGS model (PGSGS), which has the attractive feature of being independent of filter width, but has not previously been used in free shear flow. Results show that the R2M technique was able to generate an unsteady 3D velocity field at the nozzle inlet plane which matched available experimental data and possessed physically consistent spatial and temporal correlations. Using an appropriately refined mesh, turbulence was sustained through the nozzle, enabling good prediction of the nozzle exit boundary layer state and the near field jet plume development. The PGSGS model was observed to improve predictions compared to the standard Smagorinsky SGS model.

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