Input-output analysis of complex hypersonic boundary layers

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We apply I/O analysis to investigate multi-modal instability mechanisms in Mach 6 flow past a cold-wall sharp cone and blunt cones with and without a swept fin. I/O analysis, based on the resolvent operator, considers the linear dynamical response of an entire flow system to small externally imposed fluctuations. The global view taken by I/O analysis allows it to handle complex geometry seamlessly. All of the cases we consider involve multi-mode interaction, which is difficult for traditional stability analysis to capture. We demonstrate that I/O analysis captures both modal growth and non-modal growth in hypersonic boundary layers, and thus provides an ideal platform to study multi-mode instability. As the cases that we consider become progressively more complex we show that such interactions become increasingly important.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2019 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105784
DOIs
StatePublished - Jan 1 2019
EventAIAA Scitech Forum, 2019 - San Diego, United States
Duration: Jan 7 2019Jan 11 2019

Publication series

NameAIAA Scitech 2019 Forum

Conference

ConferenceAIAA Scitech Forum, 2019
CountryUnited States
CitySan Diego
Period1/7/191/11/19

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  • Cite this

    Nichols, J. W., & Candler, G. V. (2019). Input-output analysis of complex hypersonic boundary layers. In AIAA Scitech 2019 Forum (AIAA Scitech 2019 Forum). American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2019-1383