Thermochemical interactions in the linear stability of hypersonic boundary layers

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Recent shock tunnel experiments have shown an increase in transition Reynolds number with increasing freestream total enthalpy, and linear stability theory has been used to reproduce the same trends. It was observed that as the freestream enthalpy is increased, the presence of chemical reactions and translational-vibrational energy exchange in the boundary layer becomes increasingly important and a stability code which does not take these effects into account will not give correct disturbance amplification rates. Previous work has shown a significant damping effect of endothermic chemical reactions and thermal energy transfer in boundary layer disturbances. Conversely, exothermic reactions were shown to have a destabilizing effect. These results were observed while simulating the complicated air flows of the shock tunnel experiments, making it difficult to effectively isolate the relevant stabilizing or destabilizing mechanisms. Therefore, a series of numerical experiments were performed under more controlled conditions in an attempt to further our understanding of the role of thermochemical interactions in hypersonic boundary layer stability.

Original languageEnglish (US)
Number of pages12
StatePublished - 1998
Event29th AIAA Fluid Dynamics Conference - Albuquerque, United States
Duration: Jun 15 1998Jun 18 1998


Other29th AIAA Fluid Dynamics Conference
Country/TerritoryUnited States

Bibliographical note

Funding Information:
and AASERT Grant No. DA/DAAH04-96-1-0269. This work was also sponsored in part by the Army High Performance Computing Research Center under the auspices of the Department of the Army, Army Research Laboratory cooperative agreement number DAAH04-95-2-0003 / contract number DAAH04-95-C-0008, the content of which does not necessarily re- flect the position or the policy of the government, and no official endorsement should be inferred.

Publisher Copyright:
© 1998, American Institute of Aeronautics and Astronautics, Inc.

Copyright 2017 Elsevier B.V., All rights reserved.


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