Guangjing JU, Lin BAO

DOI Number: XXX-YYY-ZZZ

Conference number: HiSST 2024- 0096

In high-enthalpy shock tunnel experiments, the expansion flow originating from the high-temperature chamber accelerates rapidly. Consequently, the flow exists in a state of thermochemical non-equilibrium. Furthermore, due to incomplete wall catalysis, heterogeneous reactions are also in a non-equilibrium state. Therefore, it is essential to consider the effects of chemical non-equilibrium when measuring heat transfer in shock tunnel experiments. In this study, computational fluid dynamics (CFD) is employed to investigate the influence of partially catalytic walls on heat flux under high-enthalpy shock tunnel conditions, using a flat plate as the physical model. It is assumed that the wall heat flux can be divided into two components: one associated with translational-rotational energy, which can be determined using classical boundary layer theory, and the other related to catalytic reactions, which can be determined based on the Damköhler number. These results are valuable for the establishment on a ground-to-flight extrapolation methodology in the context of chemical non-equilibrium hypersonic flows.

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In Categories: 1.Events, High-Speed Aerodynamics and Aerothermodynamics, HiSST 2024
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