Imperial College London
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DrPaulBruce

Faculty of Engineering, Department of Aeronautics

Reader in High-Speed Aerodynamics
 
 
 
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Contact

 

+44 (0)20 7594 5048p.bruce

 
 
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Location

 

333City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Rabey:2019:10.1017/jfm.2019.404,
author = {Rabey, P and Jammy, SP and Bruce, P and Sandham, N},
doi = {10.1017/jfm.2019.404},
journal = {Journal of Fluid Mechanics},
title = {Two-dimensional unsteadiness map of oblique shock wave/boundary layer interaction with sidewalls},
url = {http://dx.doi.org/10.1017/jfm.2019.404},
volume = {871},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The low-frequency unsteadiness of oblique shock wave/boundary layer interactions (SBLIs) has been investigated using large-eddy simulation (LES) and high-frequency pressure measurements from experiments. Particular attention has been paid to off-centreline behaviour: the LES dataset was generated including sidewalls and experimental pressure measurements were acquired across the entire span of the reflected shock foot. The datasets constitute the first maps of low-frequency unsteadiness in both streamwise and spanwise directions. The results reveal that significant low-frequency shock motion (with St ≈ 0.03) occurs away from the centreline, along most of the central separation shock and in the corner regions. The most powerful low frequency unsteadiness occurs offcentre, likely due to the separation shock being strengthened by shocks arising from the swept interactions on the sidewalls. Both simulation and experimental results exhibit asymmetry about the spanwise centre. In simulations, this may be attributed to a lack of statistical convergence; however, the fact that this is also seen in experiments is indicative that some SBLIs may exhibit some inherent asymmetry across the two spanwise halves of the separation bubble. There is also significant low-frequency power in the corner separations. The relation of the unsteadiness in the corner regions to that in the centre is investigated by means of two-point correlations: a key observation is that significant correlation does not extend across the attached flow channel between the central and corner separations.
AU  - Rabey,P
AU  - Jammy,SP
AU  - Bruce,P
AU  - Sandham,N
DO  - 10.1017/jfm.2019.404
PY  - 2019///
SN  - 0022-1120
TI  - Two-dimensional unsteadiness map of oblique shock wave/boundary layer interaction with sidewalls
T2  - Journal of Fluid Mechanics
UR  - http://dx.doi.org/10.1017/jfm.2019.404
UR  - http://hdl.handle.net/10044/1/69398
VL  - 871
ER  -
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