Computational modeling of fin induced shock wave/turbulent boundary layer interactions over an axisymmetric surface

Joshua D. Pickles, Balachandra, R. Mettu, Pramod K. Subbareddy, Venkateswaran Narayanaswamy, Joseph D. Vasile, James Despirito

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


Interactions between an oblique shock wave generated by a sharp fin placed on a cylindrical surface and the incoming boundary layer have critical occurrence in several practical platform. However, the resulting flowfield is very complex with multiple non-linear interactions between the fin shock, incoming boundary layer, and 3D relief effects from the surface curvature. Having the ability to predict the resulting flowfield and the variables of interest can make a transformational impact in different topics of interest. Rigorous computational studies are presented to delineate both the surface and off-body flow structures of the fin generated shock boundary layer interactions at a freestream Mach number of 2.5. The fin angle was chosen (20 degrees) such that the resultant shock wave generates a complex separated flow including both primary and secondary separation and reattachment features. RANS framework was adopted for computations to address realistic situations where such vehicle designs are undertaken. Two common turbulence models (−and SA) are presented and the models are implemented using two different solvers (US3D and CFD++) maintaining the same inflow condition. Comparisons are made of the mean surface and off-body quantities between the different models and experimental measurements.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2020 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Number of pages13
ISBN (Print)9781624105951
StatePublished - 2020
Externally publishedYes
EventAIAA Scitech Forum, 2020 - Orlando, United States
Duration: Jan 6 2020Jan 10 2020

Publication series

NameAIAA Scitech 2020 Forum
Volume1 PartF


ConferenceAIAA Scitech Forum, 2020
Country/TerritoryUnited States

Bibliographical note

Funding Information:
Funding for this investigation has been provided by the Army Research Office under grant W911NF-16-1-0072. CCDC-ARL contributions were supported in part by a grant of high-performance computing time from the U.S. Department of Defense High Performance Computing Modernization program at the U.S. Army CCDC-Army Research Laboratory Supercomputing Resource Center, Aberdeen Proving Ground, MD.

Publisher Copyright:
© 2020, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.


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