期刊
ACTA ASTRONAUTICA
卷 191, 期 -, 页码 178-192出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actaastro.2021.10.040
关键词
Hypersonic flows; Thermochemical non-equilibrium; Double-wedge; Shock wave/boundary layer interaction; Periodic flows
资金
- Italian Ministry of Education, University and Research [CUP -D94I18000260001]
- CINECA award under the ISCRA initiative [HP10CQ5D03, HP10CGAD79]
The paper presents highly detailed two-dimensional numerical simulations of hypersonic nitrogen and air flows around a double wedge, focusing on the unsteady behavior and thermo-chemical non-equilibrium effects. The results show that the occurrence of unsteady periodic behavior depends on the flow conditions and is inhibited in the high enthalpy case. Furthermore, discrepancies between the results obtained with different thermo-physical models are observed in the case of high enthalpy flows.
The paper presents highly detailed two-dimensional numerical simulations of hypersonic nitrogen and air flows around a double wedge, characterized by a complex shock wave/boundary layer interaction (SWBLI). The aim of the study is on one hand to investigate the unsteady behavior of such an interaction and on the other to evaluate thermo-chemical non-equilibrium effects. Two different thermo-physical models have been considered, the classical multi-temperature, or mode approximation, and the state-to-state vibrational kinetics. It is shown that for the geometric configuration under investigation, the occurrence of unsteady periodic behavior depends on the flow conditions and is inhibited in the high enthalpy case. Furthermore, non-equilibrium effects become relevant in the case of high enthalpy flows and discrepancies between the results obtained with the two models are observed.
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