Cavity Flow Assessment Using Advanced Turbulence Methods

The vortex shedding generated by compressible subsonic flow interacting with a wall cavity has been investigated using large-eddy-simulation-based turbulence techniques embedded within a legacy Reynolds-averaged Navier- Stokes solver. Cavity simulations using hybrid turbulence approaches seek the ac...

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Bibliographic Details
Published in:Journal of aircraft 2011-01, Vol.48 (1), p.141-156
Main Authors: Liggett, Nicholas D, Smith, Marilyn J
Format: Article
Language:English
Subjects:
Accuracy
Acoustics
Aeroacoustics, atmospheric sound
Aerodynamics
Comparative analysis
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Physics
Reynolds equation
Shear stress
Simulation
Turbulence models
Turbulence simulation and modeling
Turbulent flows, convection, and heat transfer
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Summary:The vortex shedding generated by compressible subsonic flow interacting with a wall cavity has been investigated using large-eddy-simulation-based turbulence techniques embedded within a legacy Reynolds-averaged Navier- Stokes solver. Cavity simulations using hybrid turbulence approaches seek the accuracy of large-eddy simulation by providing filtering and modeling of subgrid-scale turbulence with the cost of traditional Reynolds-averaged Navier- Stokes. Simulations applying differing techniques of hybridization of the Menter k-... shear stress transport Reynolds-averaged Navier-Stokes approach include detached eddy simulation (DES-SST), blended subgrid-scale turbulence models (GT-HRLES), and a self-adjusting large-eddy-simulation-very-large-eddy-simulation technique (KES) provide an understanding of differing hybrid approaches. Cavity flow results from Reynolds-averaged Navier-Stokes and hybrid simulations are compared with experiment and large-eddy simulation predictions. Evaluation of important flow characteristics illustrates the abilities of these advanced turbulence modeling techniques compared with traditional Reynolds-averaged Navier-Stokes models. Examination of the influence of the grid, time step, and simulation period demonstrates the sensitivity of the aerodynamic and aeroacoustic predictions to these parameters. In particular the subgrid-scale blended model, GT-HRLES, shows significant improvement in the ability to capture the acoustic signatures and flowfield features on a Reynolds-averaged Navier-Stokes or very-large-eddy-simulation grid compared with the other models. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0021-8669
1533-3868
DOI:10.2514/1.C031019