A Spectral Analysis Modal Method Applied to Cavity Flow Oscillations
Publication Type:
Conference
Authors:
Co-Authors:
Ukeiley, L.
Year Published:
2019
Abstract:
This paper presents a spectral analysis modal method applied to a canonical cavity flow at Mach 0.6. In particular , time-resolved (TR) unsteady surface pressure measurements are synchronized with non-time resolved (NTR) pla-nar Particle Image Velocity measurements along the cavity midplane. We present a linear multiple-input/multiple-output (MIMO) frequency-domain model to estimate the cavity flow system. The model is further used for modal decomposition via Proper Orthogonal Decomposition (POD) in the spectral domain. Temporally and spatially coherent structures associated with Rossiter modes are identified. These results are compared with corresponding POD and Dynamic Mode Decomposition (DMD) modes obtained using independent time-resolved PIV measurements, which show strong similarities in the resulting modes.
Conference Name:
Eleventh International Symposium on Turbulence and Shear Flow Phenomena (TSFP11)
Conference Location:
Southampton, UK
Other Numbers:
Refereed Designation:
Date Published:
7/1/2019