On Linear Stability of Compression Corner Flows Obtained by Kinetic Theory

Irmak T. Karpuzcu, Deborah A. Levin, Nicolas Cerulus, Vassilis Theofilis

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


Two-dimensional supersonic flow over several compression corners are computed by Direct Simulation Monte Carlo (DSMC) and their linear global stability analysed by solution of the compressible BiGlobal eigenvalue problem on generalised coordinates. The base flow features a large separation bubble, while time resolved data showed that the flow reached a steady state at the parameters examined. The maximum recirculation, calculated by reference to the free stream velocity, is found to be around 10% for all cases. Linear stability analysis performed confirms this conjecture, yielding a globally stable solution for a wide range of spanwise wavenumbers. The two-dimensional (spanwise wavenumber β = 0) limit is found to be the least stable, an increase of β leading to more stable spectra while retaining the same leading stationary mode. Higher scaled ramp angles, leading to substantially higher recirculation levels, are currently being analyzed.

Original languageEnglish (US)
Title of host publicationAIAA AVIATION 2022 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624106354
StatePublished - 2022
Externally publishedYes
EventAIAA AVIATION 2022 Forum - Chicago, United States
Duration: Jun 27 2022Jul 1 2022

Publication series

NameAIAA AVIATION 2022 Forum


ConferenceAIAA AVIATION 2022 Forum
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering
  • Aerospace Engineering


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