Hostname: page-component-78c5997874-t5tsf Total loading time: 0 Render date: 2024-11-10T14:43:45.747Z Has data issue: false hasContentIssue false
  • English
  • Français

Studying Three-Dimensionality of Vortex Shedding Behind a Circular Cylinder with Mems Sensors

Published online by Cambridge University Press:  05 May 2011

J. K. Tu ,
J. J. Miau ,
Y. J. Wang ,
G. B. Lee  and
C. Lin
J. K. Tu*
Affiliation:
Department of Aeronautics and Astronautics, National Cheng-Kung University, Tainan, Taiwan 70101, R.O.C.
J. J. Miau*
Affiliation:
Department of Aeronautics and Astronautics, National Cheng-Kung University, Tainan, Taiwan 70101, R.O.C.
Y. J. Wang*
Affiliation:
Department of Aeronautics and Astronautics, National Cheng-Kung University, Tainan, Taiwan 70101, R.O.C.
G. B. Lee*
Affiliation:
Department of Engineering Science, National Cheng-Kung University, Tainan, Taiwan 70101, R.O.C.
C. Lin*
Affiliation:
Department of Civil Engineering, National Chung Hsing University, Taichung, Taiwan 40227, R.O.C.
*
*Ph.D. candidate
**Professor
***Master student
**Professor
**Professor
Get access

Abstract

Experiments were made with 14 MEMS sensors situated along the span of a circular cylinder whose aspect ratio was 5. The signals of the MEMS sensors were sampled simultaneously as flow over the cylinder at Reynolds numbers of 104. The results of Wavelet analysis of the signals indicate that the percentage of time during which strong three-dimensionality of vortex shedding was detected is about 10%.As noted, strong three-dimensionality took place when the fluctuating amplitude of the signals was severely modulated and the vortex shedding frequency reduced appeared abnormally high or low. Further noted was that the addition of a splitter plate of 0.5 or one diameter in length behind the circular cylinder was not able to suppress the three-dimensionality of the flow.

Keywords

MEMS sensorsWaveletThree-dimensionality of vortex shedding
Type
Articles
Information
Journal of Mechanics , Volume 23 , Issue 2 , June 2007 , pp. 107 - 116
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2007

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1.Hama, F. R., “Three-Dimensional Vortex Pattern Behind a Circular Cylinder,” Journal of the Aeronautical Sciences, 24, pp. 156–158 (1957).Google Scholar
2.Bloor, M. S., “The Transition to Turbulence in the Wake of a Circular Cylinder,” Journal of Fluid Mechanics, 19, pp. 290–304 (1964).CrossRefGoogle Scholar
3.Gerrard, J. H., “The Three-Dimensional Structure of the Wake of a Circular Cylinder,” Journal of Fluid Mechanics, 25, pp. 143–164(1966).CrossRefGoogle Scholar
4.Roshko, A., “Perspectives on Bluff Body Aerodynamics,” Journal of Wind Engineering and Industrial Aerodynamics, 49, pp. 79–100 (1993).CrossRefGoogle Scholar
5.Williamson, C. H. K., ”Three-Dimensional Wake Transition, “ Journal of Fluid Mechanics, 328, pp. 345–407 (1996).CrossRefGoogle Scholar
6.Norberg, C., “Fluctuating Lift on a Circular Cylinder: Review and New Measurements,” Journal of Fluids and Structures, 17, pp. 57–96 (2003).CrossRefGoogle Scholar
7.Norberg, C., “An Experimental Investigation of the Flow around a Circular Cylinder: Influence of Aspect Ratio,” Journal of Fluid Mechanics, 258, pp. 287–316 (1994).CrossRefGoogle Scholar
8.Szepessy, S. and Bearman, P. W., “Aspect Ratio and End Plate Effects on Vortex Shedding from a Circular Cylinder,” Journal of Fluid Mechanics, 234, pp. 191–217 (1992).CrossRefGoogle Scholar
9.Najjar, F. M. and Vanka, S. P., “Effects of Intrinsic Three-Dimensionality on the Drag Characteristics of a Normal flat plate,” Phys. Fluids, 7(10), pp. 2516–2518 (1995).CrossRefGoogle Scholar
10.Braza, M., Faghani, D. and Persillon, H., “Successive Stages and the Role of Natural Vortex Dislocations in Three-Dimensional Wake Transition,” Journal of Fluid Mechanics, 439, pp. 1–41 (2001).CrossRefGoogle Scholar
11.Thompson, M., Hourigan, K. and Sheridan, J., “Three-Dimensional Instabilities in the Wake of a Circular Cylinder,” Experimental Thermal and Fluid Science, 12, pp. 190–196(1996).CrossRefGoogle Scholar
12.Henderson, R. D., “Nonlinear Dynamics and Pattern Formation in Turbulent Wake Transition,” Journal of Fluid Mechanics, 352, pp. 65–112 (1997).CrossRefGoogle Scholar
13.Roshko, A., “On the Development of Turbulent Wakes from Vortex Streets,” NACA Report 1191, (1954).Google Scholar
14.Zdravkovich, M. M., “Different Modes of Vortex Shedding: an Overview,” Journal of Fluids and Structures, 10, pp. 427–437 (1996).CrossRefGoogle Scholar
15.Miau, J. J., Wu, S. J., Hu, C. C. and Chou, J. H., “Low-Frequency Modulations Associated with Vortex Shedding from Flow over Bluff Body,” AIAA Journal 42(7), pp. 1388–1396(2004).CrossRefGoogle Scholar
16.Wu, S. J., Miau, J. J., Hu, C. C. and Chou, J. H., “On Low-Frequency Modulations and Three-Dimensionality in Vortex Shedding Behind a Normal Plate,” Journal of Fluid Mechanics, 526, pp. 117–146 (2005).CrossRefGoogle Scholar
17.Wang, C. T., “Clarifying low-frequency variations phenomenon using a novel mode decomposition method,” Journal of Mechanics, 22, pp. 193–198 (2006).CrossRefGoogle Scholar
18.Huang, N. E., Shen, Z., Long, S. R., Wu, M. C., Shih, H. H., Zheng, Q., Yen, N. C., Tung, C. C. and Liu, H. H., “The Empirical Mode Decomposition and the Hilbert Spectrum of Nonlinear and Non-Stationary Time Series Analysis,” Proc. R. Soc. Lond., A454, pp. 903–995 (1998).CrossRefGoogle Scholar
19.Miau, J. J., Tu, J. K., Chou, J. H. and Lee, G. B., “Sensing Flow Separation on a Circular Cylinder by MEMS Thermal-Film Sensors,” AIAA Journal 44(10), pp. 2224–2230 (2005).CrossRefGoogle Scholar
20.Mattingly, G. E., “An experimental study of the three dimensionality of the flow around a circular cylinder,” University of Maryland, Technical Note BN-295, (1962).Google Scholar
21.Gerich, D. and Eckelmann, H., “Influence of End Plates and Free Ends on the Shedding Frequency of Circular Cylinders,” Journal of Fluid Mechanics, 122, pp. 109–121 (1982).CrossRefGoogle Scholar
22.Torrence, C. and Compo, T. P., “A Practical Guide to Wavelet Analysis,” Bull. Am. Met. Soc., 79, pp. 61–78 (1998).2.0.CO;2>CrossRefGoogle Scholar
23.Nishimura, H. and Taniike, Y., “Aerodynamic Characteristics of Fluctuating Forces on a Circular Cylinder,” Journal of Wind Engineering and Industrial Aerodynamics, 89, pp. 713–723 (2001).CrossRefGoogle Scholar
24.Miau, J. J., Yang, C. C., Chou, J. H. and Lee, K. R., “Suppression of Low Frequency Variations in Vortex Shedding by a Splitter Plate behind a Bluff Body,” Journal of Fluids and Structures, 7, pp. 897–912 (1993).CrossRefGoogle Scholar
25.Miau, J. J., Wang, Y. J. and Tu, J. K., “On the threedimensionality of initial wake developments behind a normal plate and a T-shaped vortex shedder,” Eurasian Physical Technical Journal, 2(4), pp. 52–62 (2005).Google Scholar
26.Wei, C. Y. and Miau, J. J., “Influences of Freestream Turbulence and Wake on Flow Near the Stagnation Region,” Journal of the Chinese Society of Mechanical Engineers, 12(6), pp. 555–562 (1991).Google Scholar
27.Wei, C. Y. and Miau, J. J., “Stretching of Freestream Turbulence in Stagnation Region,” AIAA Journal, 30(9), pp. 2196–2203 (1992).CrossRefGoogle Scholar
28.Wei, C. Y. and Miau, J. J., “Characteristics of Stretched Vortical Structures in Two-Dimensional Stagnation Flow,” AIAA Journal, 31(11), pp. 2075–2082 (1993).CrossRefGoogle Scholar
29.Hunt, J. C. R., “A Theory of Turbulent Flow Round Two-Dimensional Bluff Bodies,” Journal of Fluid Mechanics, 61, Pt. 4, pp. 625–706 (1973).CrossRefGoogle Scholar
30.Sadeh, W. Z. and Brauer, H. J., “A Visual Investigation of Turbulence in Stagnation Flow about a Circular Cylinder,” Journal of Fluid Mechanics, 99, Pt. 1, pp. 53–64 (1980).CrossRefGoogle Scholar
31.Britter, R. E., Hunt, J. C. R. and Mumford, J. C., “The Distortion of Turbulence by a Circular Cylinder,” Journal of Fluid Mechanics, 92, Pt. 2, pp. 269–301 (1979).CrossRefGoogle Scholar