Abstract
Certain features of the large-scale, time-dependent flow structure from an oscillating, three-dimensional body can be approximated by using combined hydrogen bubble visualization, video recording, and computer-aided design (CAD) reconstruction. This technique requires a single bubble wire and video camera in conjunction with a phase reference from the oscillating body to acquire two-dimensional projections of the flow at desired spanwise locations. In principle, this technique and its extensions can be employed for any unsteady, three-dimensional flow where a suitable phase reference exists. Appropriate generation of bubble timelines leads to three-dimensional “time-surfaces” at selected instants of time, and threreby a three-dimensional space-time estimate of the macroscale features of the flow.
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References
Griffin, O. M.; Ramberg, S. E. 1974: Vortex-street wakes of vibrating cylinders. J. Fluid Mech. 66, 553–576
Gumas, C.; Rockwell, D. 1985: The Fourier descriptor technique: a means of pattern recognition and description in fluid mechanics (to be submitted for publication)
Ho, C.-M.; Huerre, P. 1984: Perturbed free shear layer. Ann. Rev. Fluid Mech. 16, 365–424
Smith, C. R.; Paxson, R. D. 1983: A technique for evaluating of three-dimensional behavior in turbulent boundary layers using computer-augmented hydrogen-bubble-wire flow visualization. Exp. Fluids 1, 33–49
Smith, C. R.; Paxson, R. D. 1985: Computer augmented hydrogen bubble-wire flow visualization of turbulent boundary layers. In: Flow Visualization III (ed. Yang, W. J.) pp. 185–189. Washington: Hemisphere
Staubli, T. 1983: Calculation of the vibration of an elastically mounted cylinder using experimental data from forced oscillation. J. Fluids Eng. 105, 225–229
Wygnanski, L; Peterson, R. A. 1985: Coherent motion in excited free shear flows. AIAA Paper 85-0539
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Ongoren, A., Chen, J. & Rockwell, D. Multiple time-surface characterization of time-dependent, three-dimensional flows. Experiments in Fluids 5, 418–422 (1987). https://doi.org/10.1007/BF00264407
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DOI: https://doi.org/10.1007/BF00264407