Investigation into The Influences of Turbulence Models on Heating Prediction of Hypersonic Inflatable Aerodynamic Decelerator

Abstract

With the increasing demand for larger payloads for manned spaceflight and planetary exploration missions, hypersonic inflatable aerodynamic decelerator has gradually great application potentiality. The work presents the numerical simulations of hypersonic inflatable aerodynamic decelerator by the compressible Reynolds averaged Navier-Stokes equations with different turbulence models (such as SA, BSL, wilcox1988, SST). The pressure, eddy viscosity and heat flux under three Reynolds numbers (6.89E+6, 9.94E+6, 12.73E+6) are analyzed. The results demonstrate that the surface pressure distributions have slight difference, whereas the surface heating distributions appear remarkable diversity. In addition, compared with one equation turbulence model, two-equation turbulence models maybe more suitable for hypersonic heating predictions.

Heat Balance Features of Decelerator System Considering Real-Time Reliability

“…Yang et al [21] used the compressible Reynolds averaged Navier-Stokes equations to perform numerical simulations on hypersonic inflatable aerodynamic decelerator, and analyzed the pressure, eddy viscosity, and heat flux under three Reynolds numbers (6.89E+6, 9.94E+6, 12.73E+6), and their results suggest slight difference in surface pressure distributions and significant difference in surface heating distributions; moreover, the authors believe that compared with one equation turbulence model, two-equation turbulence models maybe more suitable for hypersonic heating predictions. Scholar Hollis [22] carried out wind-tunnel tests to study the aerothermodynamic environment of a hypersonic inflatable aerodynamic decelerator with a flexible thermal protection system.…”