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Acta Aeronautica et Astronautica Sinica ›› 2023, Vol. 44 ›› Issue (16): 127980-127980.doi: 10.7527/S1000-6893.2022.27980

• Fluid Mechanics and Flight Mechanics • Previous Articles     Next Articles

Numerical simulation of aero-heating in slip flow regime with chemical non-equilibrium

Chongxiao LIU, Jiangfeng WANG()   

  1. College of Aerospace Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing  210016,China
  • Received:2022-09-07 Revised:2022-09-27 Accepted:2022-11-29 Online:2022-12-16 Published:2022-12-14
  • Contact: Jiangfeng WANG E-mail:wangjf@nuaa.edu.cn
  • Supported by:
    Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)

Abstract:

Numerical simulation predicting the aero-heating of chemical non-equilibrium flow in the slip flow regime has been carried out for the Orbital Reentry Experiment (OREX) vehicle by solving multicomponent chemical non-equilibrium Navier-Stokes(N-S) equations. A detailed comparison is made between the finite rate catalytic and non-catalytic, slip and no-slip wall conditions, and the influence of surface catalysis and slip effects on aero-heating is studied. The main mechanism affecting aero-heating is also analyzed. The results show that surface catalysis and slip effects influence the distribution of flow properties, with a strong impact on the shock stand-off distance at 92.82 km. With the decrease in altitude, the gap of heat flux increases between the finite rate catalytic and non-catalytic wall conditions, while decreases between the slip and no-slip wall conditions. At an altitude lower than 92.82 km, the stagnation point heat flux of the finite rate catalytic wall agrees well with the flight data, with the deviation within 11%. In the area near the wall, the catalytic effect has a considerable influence on species distribution, while the temperature jump condition of slip effects exerts a significant impact on the temperature distribution.

Key words: hypersonic, chemical non-equilibrium, surface catalysis, slip effects, aero-heating enviroment

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