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- W1657216912 abstract "A new method of turbulence generation for wind-tunnel studies of bridge models is investigated in the present study. In this method an additional energy is supplied to the mean flow by stirring air in an active manner. Two arrays of symmetric airfoils are placed in the smooth, uniform flow and oscillate pseudorandomly driven by an oppropriate servo-system and input driving signals. Vertical and horizontal velocity components are of main interest. Various configurations of the generator were considered and velocity measurements were taken in the near wake downstream of the generator. Turbulence intensities, scales and spectra were evaluated at different locations. Generation of turbulence of given characteristics for the two velocity components of interest was possible provided that the experimental configuration of the generator was correctly selected. Measured velocity spectra were in good agreement with the target spectra, especially in the low-frequency range. The integral scales of turbulence were approximately one order of magnitude larger than the scales of a typical grid turbulence generated in the same wind-tunnel conditions. (FHWA)" @default.
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- W1657216912 date "1983-02-01" @default.
- W1657216912 modified "2023-09-23" @default.
- W1657216912 title "ACTIVE MODELING OF TURBULENCE FOR WIND-TUNNEL STUDIES OF BRIDGE MODELS" @default.
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