Vortex structures in the separated flow on an inclined flat plate under electromagnetic forcing: influences of excitation wave form, frequency, and amplitude


Vortex structures in the separated flow on an inclined flat plate under electromagnetic forcing: influences of excitation wave form, frequency, and amplitude

Weier, T.; Cierpka, C.; Gerbeth, G.

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.

Keywords: Proper Orthogonal Decomposition; Continuous Wavelet Analysis; Coherent Structures; Flow Control; Lorentz force

  • Lecture (Conference)
    5th International Symposium on Turbulence and Shear Flow Phenomena, 27.-29.08.2007, München, Germany
  • Contribution to proceedings
    5th International Symposium on Turbulence and Shear Flow Phenomena, 27.-29.08.2007, München, Germany
    Proceedings of the 5th International Symposium on Turbulence and Shear Flow Phenomena, 1105-1110

Permalink: https://www.hzdr.de/publications/Publ-10015
Publ.-Id: 10015