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Fifth International Symposium on Turbulence and Shear Flow Phenomena
August, 27-29, 2007, Technische Universität München, Munich, Germany

DOI: 10.1615/TSFP5

VORTEX STRUCTURES IN THE SEPARATED FLOW ON AN INCLINED FLAT PLATE UNDER ELECTROMAGNETIC FORCING: INFLUENCES OF EXCITATION WAVE FORM, FREQUENCY, AND AMPLITUDE

pages 1105-1110
DOI: 10.1615/TSFP5.1720
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RESUMO

Wall parallel Lorentz forces have been used to excite the separated flow on the suction side of inclined symmetric hydrofoils. Resulting lift enhancements resemble those known from alternative active flow control methods. The controlled flow is characterized by a small number of relatively large vortices, which are related to the control mechanism. Consequently, time resolved flow fields have been analyzed by proper orthogonal decomposition and continuous wavelet transform to extract dominant features. Both evaluation methods highlight significant influences of excitation frequency, wave form, and amplitude.

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