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RANS prediction of open jet aerofoil interaction and design metrics

Published online by Cambridge University Press:  24 July 2019

A. A. Sheikh Al-Shabab Open the ORCID record for A. A. Sheikh Al-Shabab [Opens in a new window]  and
P. G. Tucker
A. A. Sheikh Al-Shabab
Affiliation:
Department of Engineering University of CambridgeCambridge, United Kingdom
P. G. Tucker*
Affiliation:
Department of Engineering University of CambridgeCambridge, United Kingdom
*
pgt23@cam.ac.uk
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Abstract

RANS models remain an attractive turbulence simulation method which could provide some open jet aerofoil interaction analysis at a fraction of the cost of a high-fidelity LES approach. The present work explores the potential and limitations of RANS in this context by simulating an open jet aerofoil noise experiment using the aerospace oriented Menter SST RANS model. This model’s tendency to transition at a critical Reynolds number lower than the experimental value was found to impact the boundary layer development. However, the introduction of a low-Re correction improved the prediction of surface pressure and skin friction, enabling the suction surface separation bubble to be captured. The free shear layer’s virtual origin characteristics exhibited sensitivity to the interaction with the aerofoil, which can be developed into a metric of the interaction. The main challenge for RANS was accounting for the rise in background disturbance level in the working section, which is caused by the high-turbulence intensity in the free shear layers.

Keywords

AerodynamicsInstallation effectsComputational fluid dynamicsOpen jetTurbulence modelling
Type
Research Article
Information
The Aeronautical Journal , Volume 123 , Issue 1266 , August 2019 , pp. 1275 - 1296
Copyright
© Royal Aeronautical Society 2019 

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Footnotes

*

Present affiliation: School of Aerospace, Transport and Manufacturing, Cranfield University, Cranfield, United Kingdom.

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