TY - JOUR

T1 - Hypersonic boundary layer when flying in the atmosphere of Mars

AU - Grigoryev, Yu N.

AU - Ershov, I. V.

AU - Gorobchuk, A. G.

N1 - The study was supported by a grant of the Russian Science Foundation No. 23-11-00027, https://rscf.ru/project/23-11-00027/.

PY - 2024

Y1 - 2024

N2 - The structure of the boundary layer on a flat surface under conditions of landing on Mars is studied. A two-temperature model of a vibrationally excited dissociating three-component gas comprising of CO2, CO and O mixture is introduced, which allows adequately reproducing the main characteristics of hypersonic flight in the Martian atmosphere. For two points of the landing trajectory on Mars, calculations of a flat boundary layer on a plate with an isothermal non-catalytic surface were performed. The profiles of gas-dynamic quantities obtained on the basis of locally self-similar equations are compared with the profiles obtained by the finite-difference method based on the complete equations of the boundary layer. It is shown that, with acceptable accuracy for subsequent stability calculations, the profiles obtained from the complete equations yield locally self-similar solutions. A comparison is made of the phase velocities of neutral (growing) perturbations obtained on the basis of the well-known criterion of the “generalized” inflection point and the corresponding generalization, which explicitly takes into account the conditions of developed dissociation.

AB - The structure of the boundary layer on a flat surface under conditions of landing on Mars is studied. A two-temperature model of a vibrationally excited dissociating three-component gas comprising of CO2, CO and O mixture is introduced, which allows adequately reproducing the main characteristics of hypersonic flight in the Martian atmosphere. For two points of the landing trajectory on Mars, calculations of a flat boundary layer on a plate with an isothermal non-catalytic surface were performed. The profiles of gas-dynamic quantities obtained on the basis of locally self-similar equations are compared with the profiles obtained by the finite-difference method based on the complete equations of the boundary layer. It is shown that, with acceptable accuracy for subsequent stability calculations, the profiles obtained from the complete equations yield locally self-similar solutions. A comparison is made of the phase velocities of neutral (growing) perturbations obtained on the basis of the well-known criterion of the “generalized” inflection point and the corresponding generalization, which explicitly takes into account the conditions of developed dissociation.

KW - atmosphere of Mars

KW - dissociation

KW - finite difference scheme

KW - hypersonic boundary layer

KW - locally self-similar solutions

KW - numerical calculations

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85196274397&origin=inward&txGid=65b4c9afac8fbd611aef6b0bc36626fd

UR - https://www.elibrary.ru/item.asp?id=68592799

UR - https://www.mendeley.com/catalogue/86837535-472c-3e43-8292-faf9ddd77753/

U2 - 10.25743/ICT.2024.29.3.002

DO - 10.25743/ICT.2024.29.3.002

M3 - Article

VL - 29

SP - 5

EP - 24

JO - Вычислительные технологии

JF - Вычислительные технологии

SN - 1560-7534

IS - 3

ER -