Investigation of Large Scale Flow Structures in an Offset Attaching Jet Using Spectral Linear Stochastic Estimation

The large scale flow structures in an offset attaching jet with an offset height equal to the jet height and Re = 44 000 were studied using simultaneous measurements of the fluctuating wall pressure along the streamwise direction and the fluctuating velocity field estimated using a spectral linear stochastic estimation (LSE) technique. Box filters were used to examine the flow structures with different characteristic frequencies. The results showed evidence of different dominant flow structures in the flow. The instantaneous distributions of the estimated velocities and vorticity were examined for periods when different modes were prominent and showed differences in the behavior of the flow structures in the flow. Copyright © 2010 by the American Institute of Aeronautics and Astronautics, Inc.