Imperial College London
Portrait Picture

ProfessorMatthewSanter

Faculty of Engineering, Department of Aeronautics

Professor of Aerospace Structures
 
 
 
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Contact

 

+44 (0)20 7594 5117m.santer

 
 
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Location

 

335City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Gramola:2020:10.1016/j.jfluidstructs.2019.102856,
author = {Gramola, M and Bruce, P and Santer, M},
doi = {10.1016/j.jfluidstructs.2019.102856},
journal = {Journal of Fluids and Structures},
title = {Off-design performance of 2D adaptive shock control bumps},
url = {http://dx.doi.org/10.1016/j.jfluidstructs.2019.102856},
volume = {93},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Adaptive shock control bumps can exploit the on-design drag-reducing potential of 2D bumps, while mitigating their off-design performance deterioration through geometric modifications. In this study, experiments and simulations have been employed to investigate the wave-drag reducing potential of (actuated and unconstrained) 2D adaptive shock control bumps over a wide range of shock positions. Experiments were carried out in the Imperial College supersonic wind tunnel, modelling the adaptive bump as a flexible surface placed beneath a Mach 1.4 shock wave. 2D RANS CFD simulations of the flow in a parallel channel with a solid bump complement experiments. Wave drag was demonstrated to be proportional to the ratio of inlet to exit stagnation pressure in a blow-down wind tunnel for a given shock position. The shock exhibits a hysteretic behaviour when travelling in the wind tunnel working section, governed by the wave drag reducing potential of the bump. The actuated adaptive bump tested reduces wave drag over a wider operational envelope than solid bumps as experiments revealed the presence of three preferred structural configurations, which lead to a significantly enlarged hysteresis region. Finally, tests on unconstrained bumps were shown to increase wave drag, both on- and off-design, due to the unfavourable bump shapes that result from (only) passive actuation, suggesting that some constraints are required to achieve desirable surface deformations.
AU  - Gramola,M
AU  - Bruce,P
AU  - Santer,M
DO  - 10.1016/j.jfluidstructs.2019.102856
PY  - 2020///
SN  - 0889-9746
TI  - Off-design performance of 2D adaptive shock control bumps
T2  - Journal of Fluids and Structures
UR  - http://dx.doi.org/10.1016/j.jfluidstructs.2019.102856
UR  - http://hdl.handle.net/10044/1/75942
VL  - 93
ER  -
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