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Type: Conference paper
Title: Effectiveness of flow-excited Helmholtz resonator on turbulence structures in streamwise and spanwise directions
Author: Ghanadi, F.
Arjomandi, M.
Cazzolato, B.
Zander, A.
Citation: Proceedings of the 9th International Symposium on Turbulence and Shear Flow Phenomena (TSFP-9), 2015, vol.1, pp.2D4-1-2D4-6
Publisher: Technische Universität Darmstadt
Issue Date: 2015
ISBN: 9780000000002
Conference Name: 9th International Symposium on Turbulence and Shear Flow Phenomena (TSFP-9) (30 Jun 2015 - 3 Jul 2015 : Melbourne, Australia)
Statement of
Farzin Ghanadi, Maziar Arjomandi, Ben Cazzolato, Anthony Zander
Abstract: This paper evaluates the capability of a cylindrical flow-excited Helmholtz resonator for the manipulation of the disturbances within a three dimensional turbulent boundary layer in the streamwise and spanwise directions. Detailed investigation of the characteristics of the boundary layer downstream of the resonator has been accomplished through an extensive experimental study. The results showed that a reduction in the turbulence intensity of the streamwise velocity fluctuations and sweep events occurs immediately downstream of the resonator but this effect dissipates further away from the resonator orifice. This was hypothesized to be due to thinning of the boundary layer thickness downstream of the resonator in the streamwise direction and weakening of the spanwise vortices generated by the resonator. The results presented in this paper provide an improved understanding for further development of multiple adjacent resonators over an area as a possible alternative system for the purpose of turbulent flow control.
Rights: Copyright status unknown
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Mechanical Engineering conference papers

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