Vortex Buffeting of Aircraft Tail: Interpretation via Proper Orthogonal Decomposition

The proper-orthogonal-decomposition method is applied to particle-image-velocimetry (PIV) data to extract the most energetic flow structures of vortex-tail interaction. The reconstructed flowfields, in conjunction with patterns of vorticity and streamline topology, are compared with the original PIV data on a crossflow plane. The reconstructed flowfields using 5 and 10 eigenfunctions can predict the largest-scale features of the original flowfield. However, the smaller-scale flow structures, which are evident in the original PIV image, are lost

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