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ISSN 打印: 1065-3090

ISSN 在线: 1940-4336

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EXPERIMENTAL STUDY OF INFLUENCE OF ACTIVE METHODS OF FLOW CONTROL ON THE FLOW FIELD PAST A CYLINDER

卷 16, 册 4, 2009, pp. 353-366
DOI: 10.1615/JFlowVisImageProc.v16.i4.60
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摘要

The main emphasis of the paper is placed on the influence of an active method of flow control, as a synthetic jet, on a flow field around a cylinder with an aspect ratio of 1.8. It summarizes the influence of basic factors that affect the design of the synthetic jet actuator, particularly the Strouhal number − nondimensional frequency (F+), Stokes number of the output orifice (St), Reynolds number (Re), momentum coefficient (cμ), and a position of the output orifice of the synthetic jet actuator. The actuator is positioned in front of the boundary layer separation. The principle of flow control with and without amplitude modulation was used in order to generate a lower actuating frequency. An amount of input energy of the actuators that influences the flow filed was measured. A change of lift and drag coefficients was calculated from the measured pressure distribution by the model. The alternatives with and without flow control are compared through the relation of the saved up and added energy.

参考文献
  1. J. C. Lin, Review of research on low-profile vortex generators to control boundary layer separation.

  2. A. Glezer and M. Amitay, Synthetic jets.

  3. V. Uruba, On a synthetic jet flow.

  4. I. Wygnanski, Boundary layer and flow control by periodic addition of momentum.

  5. A. Seifert, T. Bachart, D. Koss, M. Shepshelovitch, and I. Wygnanski, Oscillatory blowing: a tool to delay boundary-layer separation.

  6. M. Amitay, A. Honohan, M. Trautman, and A. Glezer, Modification of the aerodynamic characteristics of bluff bodies using fluidic actuators.

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  8. W. P. Liu and G. H. Brodie, A demonstration of MEMS-based active turbulence transitioning.

  9. P. Catalano, M. Wang, G. Iaccarino, I. F. Sbalzarini, and P. Koumoutsakos, Optimization of cylinder flow control via zero net mass flux actuators.

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  11. D. Greenblatt and I. J. Wygnanski, The control of flow separation by periodic excitation.

对本文的引用
  1. DeMauro E. P., Leong C. M., Amitay M., Modification of the near wake behind a finite-span cylinder by a single synthetic jet, Experiments in Fluids, 53, 6, 2012. Crossref

  2. DeMauro E. P., Leong C. M., Amitay M., Interaction of a synthetic jet with the flow over a low aspect ratio cylinder, Physics of Fluids, 25, 6, 2013. Crossref

  3. Matejka Milan, Experimental Results of Synthetic Jet Wind Tunnel Tests, in Recent Progress in Flow Control for Practical Flows, 2017. Crossref

  4. Matejka Milan, Introduction to the Synthetic Jet Flow Control and Drag Reduction Techniques, in Recent Progress in Flow Control for Practical Flows, 2017. Crossref

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