000005249 001__ 5249
000005249 005__ 20210201174543.0
000005249 0247_ $$2DOI$$adoi:10.1017/jfm.2020.714
000005249 037__ $$aSCART-2021-0047
000005249 100__ $$aRamjatan, Sahade
000005249 245__ $$aBlackout analysis of Martian reentry missions
000005249 260__ $$c2020
000005249 520__ $$aA new methodology to accurately and efficiently examine the radio frequency blackout phenomenon during the hypersonic reentry process is introduced and validated. The current state-of-the-art thermochemical modelling of CO2 flows is reviewed and one-dimensional stagnation line studies are performed in order to determine a suitable chemical mechanism for the electron density modelling. Hypersonic computational fluid dynamics (CFD) simulations are performed with a simplified chemical model including only neutral species, in order to calculate the flow field surrounding the ExoMars Schiapparelli module in flight conditions. A novel decoupled CFD approach is then applied where the calculation of the electron density is performed separately using a computationally inexpensive Lagrangian approach. Subsequently, a ray tracing algorithm is applied in order to model the propagation of electromagnetic waves in the wake flow past the ExoMars vehicle accounting for collisions between electrons and gas particles. The numerical results of the proposed novel approach for blackout analysis consisting of CFD, Lagrangian and ray tracing algorithms are in good agreement with the flight data.
000005249 594__ $$aNO
000005249 700__ $$aLani, A. 
000005249 700__ $$aBoccelli, S. 
000005249 700__ $$aVan Hove, B. 
000005249 700__ $$aKaratekin, O.
000005249 700__ $$aMagin, T.
000005249 700__ $$aThoemel, J.
000005249 773__ $$pJ. Fluid Mech.$$v904$$y2020
000005249 8560_ $$fozgur.karatekin@observatoire.be
000005249 85642 $$ahttps://www.cambridge.org/core/journals/journal-of-fluid-mechanics/article/abs/blackout-analysis-of-mars-entry-missions/328B2B1985549164B63B5D2079E55493
000005249 905__ $$apublished in
000005249 980__ $$aREFERD