Numerical simulations of subsonic and transonic open-cavity flows

Yiyang Sun, Aditya G. Nair, Kunihiko Taira, Louis N. Cattafesta, Guillaume A. Brés, Lawrence S. Ukeiley

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

10 Scopus citations

Abstract

Two-dimensional open-cavity flows for free stream Mach number of 0.1 to 1.6 are investigated with direct numerical simulations for cavities of aspect ratio 2 and 6 to characterize the flow stability. We determine the neutral stability curve over a wide range of Mach numbers and Reynolds numbers. In particular, we examine the effects of compressibility on the flow in transonic regime at low Reynolds numbers. Rossiter modes are identified by spectral analysis. The corresponding spatial structures associated with the dominant and subdominant Rossiter modes are extracted with dynamic mode decomposition. The nature of these structures provides us insight to their contribution to instability of the flow. The interaction between the shock waves and the shear layer modes for the transonic flows are investigated.

Original languageEnglish (US)
Title of host publicationAIAA AVIATION 2014 -7th AIAA Theoretical Fluid Mechanics Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624102936
StatePublished - Jan 1 2014
EventAIAA AVIATION 2014 -7th AIAA Theoretical Fluid Mechanics Conference 2014 - Atlanta, GA, United States
Duration: Jun 16 2014Jun 20 2014

Publication series

NameAIAA AVIATION 2014 -7th AIAA Theoretical Fluid Mechanics Conference

Other

OtherAIAA AVIATION 2014 -7th AIAA Theoretical Fluid Mechanics Conference 2014
CountryUnited States
CityAtlanta, GA
Period6/16/146/20/14

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