UFR 3-32 Best Practice Advice

Planar shock-wave boundary-layer interaction

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Best Practice Advice

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Best Practice Advice

Key Physics

• The low frequency component (two orders of magnitude below the typical turbulent boundary layer frequencies) is an important feature of the interaction. It may be detected, for example, in the weighted power spectrum near the foot of the reflected shock wave.
• Mean and turbulent flow properties show the presence of a shock-induced separation bubble.
• For weak interaction cases the results for the spanwise periodic assumption compares favourably with experimental data.
• With strong interactions and with sidewalls present the separated flow zones are highly three dimensional.

Numerical Modelling

• Discretisation method
• Grids and grid resolution

Physical Modelling

• Turbulence modelling
• Transition modelling
• Near-wall modelling
• Other modelling

Application Uncertainties

Summarise any aspects of the UFR model set-up which are subject to uncertainty and to which the assessment parameters are particularly sensitive (e.g location and nature of transition to turbulence; specification of turbulence quantities at inlet; flow leakage through gaps etc.)

Recommendations for Future Work

Propose further studies which will improve the quality or scope of the BPA and perhaps bring it up to date. For example, perhaps further calculations of the test-case should be performed employing more recent, highly promising models of turbulence (e.g Spalart and Allmaras, Durbin's v2f, etc.). Or perhaps new experiments should be undertaken for which the values of key parameters (e.g. pressure gradient or streamline curvature) are much closer to those encountered in real application challenges.

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Contributed by: Jean-Paul Dussauge — Orange

Front Page

Description

Test Case Studies

Evaluation

Best Practice Advice

References

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