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- W2334082693 abstract "The mean velocity, turbulence and space-time correlation structure of a developing wake were measured and studied at different streamwise locations in the Virginia Tech Low Speed Linear Cascade Wind Tunnel. Single-point velocity, Reynolds stress and triple product measurements show the mid-span wake to be closely two dimensional and, at the maximum downstream measurement location (2.4 axial chords downstream the trailing edge), to have almost reached self similarity. Spectral measurements show evidence of organized structure that decays relative to the rest of the wake with downstream distance. Two-point space-time correlation measurements were made at 2 streamwise locations (0.6 and 1.8 axial chord downstream the trailing edge line) at midspan. Proper Orthogonal Decomposition was used to analyze these data and reveal the eddy structure of the developing wake. It was found that the dominant wake motions could be characterized using the first 6 POD modes. As the wake propagates downstream, the modal shapes remain virtually unchanged, while the modal energy distribution evolves through energy transfer from the strongest modes to the less energetic ones. Those results are particularly interesting since the POD structure of an inhomogeneous turbulent flow can be used to define the broadband noise source terms. A closer analysis of the aforementioned results will provide some strong basis for future wake management solutions, as well as a detailed benchmark data set for computational fluid dynamics." @default.
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- W2334082693 date "2004-05-10" @default.
- W2334082693 modified "2023-09-26" @default.
- W2334082693 title "Analysis of Wakes Shed by Idealized Aircraft Engine Fan Blades for Noise Reduction" @default.
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- W2334082693 doi "https://doi.org/10.2514/6.2004-2912" @default.
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