Investigation of transonic wake dynamics for mechanically deployable entry systems

Eric Stern, Michael Barnhardt, Ethiraj Venkatapathy, Graham Candler, Dinesh Prabhu

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

3 Scopus citations

Abstract

A numerical investigation of transonic flow around a mechanically deployable entry system being considered for a robotic mission to Venus has been performed, and preliminary results are reported. The flow around a conceptual representation of the vehicle geometry was simulated at discrete points along a ballistic trajectory using Detached Eddy Simulation (DES). The trajectory points selected span the low supersonic to transonic regimes with freestream Mach numbers from 1.5 to 0.8, and freestream Reynolds numbers (based on diameter) between 2.09 x 10 6 and 2.93 x 10 6. Additionally, the Mach 0.8 case was simulated at angles of attack between 0° and 5°. Static aerodynamic coefficients obtained from the data show qualitative agreement with data from 70° sphere-cone wind tunnel tests performed for the Viking program. Finally, the effect of choices of models and numerical algorithms is addressed by comparing the DES results to those using a Reynolds Averaged Navier-Stokes (RANS) model, as well as to results using a more dissipative numerical scheme.

Original languageEnglish (US)
Title of host publication2012 IEEE Aerospace Conference
DOIs
StatePublished - May 22 2012
Event2012 IEEE Aerospace Conference - Big Sky, MT, United States
Duration: Mar 3 2012Mar 10 2012

Publication series

NameIEEE Aerospace Conference Proceedings
ISSN (Print)1095-323X

Other

Other2012 IEEE Aerospace Conference
CountryUnited States
CityBig Sky, MT
Period3/3/123/10/12

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