Abstract
Numerical study on near wake flows of a flat plate in three kinds of oncoming flows is made by using the discrete vortex model and improved vorticity creation method. For steady oncoming flow, both gross and detailed features of the wake flow are calculated and discussed. Then, in harmonic oscillatory oncoming flow two different wake flow patterns withK c=2,4 and 10 are obtained respectively. Our results present a new wake flow pattern for lowKc numbers (Kc<5) describing vortex shedding, pairing and moving in a period of the oscillatory flow starting from rest. The calculated drag and inertia force coefficients are closer to experimental data from the U-tube than the previous results of vortex simulation. For in-line combined oncoming flow the vortex lock-in and dynamic characteristics are simulated. The results are shown to be in good agreement with experiments.
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The project supported by National Natural Science Fundation of China and LNM of Institute of Mechanics. CAS
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Guocan, L., Caimao, L. Investigations of wake flows of a flat plate in steady, oscillatory and combined flows. Acta Mech Sinica 7, 21–30 (1991). https://doi.org/10.1007/BF02486592
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DOI: https://doi.org/10.1007/BF02486592