|Preprint-No.:||< 381 >||Published in:||January 2014||PDF-File:||IGPM381_k.pdf|
|Title:||Investigation of the Unsteady Edney Type IV and VII Shock–Shock Interaction|
|Authors:||Christian Windisch, Birgit Reinartz , Siegfried Müller|
Edney type IV and type VII shock-shock interactions are complex hypersonic ﬂow phe- nomena. They are characterized by a supersonic jet which reaches far into the ﬂow ﬁeld. An experimental investigation of the inner jet structure is difficult, especially in cases where the jet is subject to high-frequency unsteady movements. The present paper pro- vides insight into the jet structure by means of a highly-resolved Computational Fluid Dynamics analysis in thermochemical nonequilibrium. Simulations of an Edney type IV interaction in nitrogen ﬂow are presented. Multiple resolution levels support the identiﬁ- cation and analysis of the mechanisms of the jet unsteadiness. The second conﬁguration is an Edney type VII interaction. This shock-shock interaction type was observed and deﬁned in nitrogen ﬂow by Yamamoto et al. The present results demonstrate that this interaction may also be observed in CO2 -dominated ﬂow with a gas composition similar to the Martian atmosphere. The results provide insight into the jet structure of this less known interaction.
|Keywords:||Hypersonic ﬂows, shock–shock interaction, grid adaptation, thermochemical nonequilibrium|
|Publication:||AIAA Jourmal |
Vol. 54, No. 6 (2016), pp. 1846-1861