TY - GEN
T1 - Numerical simulations of subsonic and transonic open-cavity flows
AU - Sun, Yiyang
AU - Nair, Aditya G.
AU - Taira, Kunihiko
AU - Cattafesta, Louis N.
AU - Brés, Guillaume A.
AU - Ukeiley, Lawrence S.
PY - 2014/1/1
Y1 - 2014/1/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84907000947&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84907000947&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84907000947
SN - 9781624102936
T3 - AIAA AVIATION 2014 -7th AIAA Theoretical Fluid Mechanics Conference
BT - AIAA AVIATION 2014 -7th AIAA Theoretical Fluid Mechanics Conference
PB - American Institute of Aeronautics and Astronautics Inc.
T2 - AIAA AVIATION 2014 -7th AIAA Theoretical Fluid Mechanics Conference 2014
Y2 - 16 June 2014 through 20 June 2014
ER -