Geodesic
Influence of thermochemical nonequilibrium on characteristics of boundary layer at flight in the Martian atmosphere
Čelâbinskij fiziko-matematičeskij žurnal, Tome 9 (2024) no. 2, pp. 213-221

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In framework on the $e^N$-method, comparative calculations of position beginning zone of laminar-turbulent transition completed for two points on landing trajectory of “Pathfinder” spacecraft on surface of the Mars. The calculations used a three-component model of a thermochemical nonequilibrium mixture $\textrm{CO}_2/\textrm{CO}/\textrm{O}$. The set of frequencies of spatial disturbances is determined along neutral curves for first unstable modes of temporary disturbances. The transition Reynolds number $\textrm{Re}_{\delta T}$ was determined from envelopes of families of the $N$-factor curves at $N_T = 8$. In hypersonic regime at $\textrm{M}=12.6$, taking into account the developed thermochemical nonequilibrium leads to a significant decrease in the static temperature of gas in the lower part of the boundary layer. As a result, beginning of the zone of laminar-turbulent transition shifts downstream by approximately 9% compared to case of a perfect gas.
Keywords: Martian atmosphere, linear stability, laminar-turbulent transition, $e^N$-method, $N$-factors integral curves. 
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     title = {Influence of thermochemical nonequilibrium on characteristics of boundary layer at flight in the {Martian} atmosphere},
     journal = {\v{C}el\^abinskij fiziko-matemati\v{c}eskij \v{z}urnal},
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Yu. N. Grigor'ev; I. V. Ershov; A. G. Gorobchuk. Influence of thermochemical nonequilibrium on characteristics of boundary layer at flight in the Martian atmosphere. Čelâbinskij fiziko-matematičeskij žurnal, Tome 9 (2024) no. 2, pp. 213-221. http://geodesic.mathdoc.fr/item/CHFMJ_2024_9_2_a5/