Computational analysis of flight data on convective heating of the Martian descent vehicle within the framework of the perfect gas model

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The spatial problem of supersonic flow past the MSL descent space vehicle in the dense layers of the Martian atmosphere is solved using the perfect gas model. The system of Reynolds-averaged Navier-Stokes (RANS) equations is numerically integrated together with the Baldwin-Lomax algebraic turbulent mixing model. In addition to studying the flow field patterns in the vicinity of the descent vehicle for real trajectory conditions, the calculated data on convective heating of the surface on the windward and leeward sides are analyzed. Change in the heating conditions during laminar-turbulent transition near the surface is taken into account. A comparison with flight data is presented.

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S. Surzhikov

Ishlinsky Institute for Problems in Mechanics, Russian Academy of Sciences

编辑信件的主要联系方式.
Email: surg@ipmnet.ru
俄罗斯联邦, Moscow

参考

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2. Fig. 1. Calculation grid and isotherms in two sections along the x-axis.

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3. Fig. 2. Longitudinal velocity field Vx = u/V∞ in the vicinity of the MSL SA at t=65.1 s.

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4. Fig. 3. Temperature field in the vicinity of the MSL CA at t=65.1 s.

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5. Fig. 4. Density of convective heat fluxes on the frontal surface of the aerodynamic shield of the MSL spacecraft at t1=61.5 s (a), t2=65.1 s (b), t3=69.3 s (c), t4=74.0 s (d).

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6. Fig. 5. Distributions of convective heat flux densities along the plane of symmetry of the frontal aerodynamic shield of the MSL spacecraft at t1=61.5 s (a), t2=65.1 s (b), t3=69.3 s (c), t4=74.0 s (d). Black curves – laminar flow, colored curves – turbulent flow.

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7. Fig. 6. Distribution of the convective Qw,tot = Qw,hc + Qdif and integral radiative heat flux Qrad densities along the MSL SA surface in the symmetry plane at t = 65 s (left) and t = 74 s (right). Baldwin–Lomax turbulent mixing model. Constant frontal surface temperature Tw = 1000 K. Solid black curve is the total convective heat flux density, dashed line is the heat flux density due to the diffusion flux to the absolutely catalytic surface; dashed line is the heat conductivity component; solid curve with round markers is the integral radiative heat flux density.

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