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Characteristics of transient vortices in the boundary layer on a rotating disk under orbital motion

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Abstract

The objective of this study is to experimentally examine the characteristics of transient vortices in the boundary layer on a disk undergoing both rotation and orbital motion. The velocity fluctuations on a rotating, orbiting disk (disk radius equal to orbital radius) are measured by the hot-wire method, and the effects of orbital motion on the transient vortices in the boundary layer are examined. When the ratio of the orbital speed to the speed of rotation is ±0.025, the interval of transient vortices depends on only the orbital radius, regardless of the directions of rotation and orbital motion. The rate of low-frequency disturbances increases as the orbital speed increases, and the vortices induced by these low-frequency disturbances travel over the disk and then develop in the region of increased velocity. Consequently, no vortices generated on a rotating disk under orbital motion are stationary relative to the disk.

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Abbreviations

r :

distance from center of disk (m)

r o :

distance from center of orbit (m)

N :

Rotational velocity (revolutions/min)

N o :

orbital velocity (r/min)

R :

disk radius (m)

R o :

orbital radius (m)

z :

height from the disk surface (m)

δ :

thickness of boundary layer under pure rotation = (ν/ω)0.5 (m)

ν :

kinematic viscosity of fluid (m2/s)

ω :

angular velocity of rotating disk (rad/s)

References

  1. H. L. Reed and W. S. Sari: Stability of Three Dimensional Boundary Layers, Annual Review of Fluid Me chanics, vol.21, pp.235–284, (1989).

    Article  ADS  Google Scholar 

  2. N. Gregory, J. T. Stuart and W. S. Walker: On the Stability of Three-Dimensional Boundary Layers with Application to the Flow Due to a Rotating Disk, Phil. Trans. R. Soc. London, A248, pp.155–199, (1955).

    Article  MathSciNet  ADS  Google Scholar 

  3. Y. Kohama: Study on Boundary Layer Transition of a Rotating Disk, Acta Mechanica, vol.50, pp.193–199, (1984).

    Article  ADS  Google Scholar 

  4. M. Munekata, N. Jobi, K. Ikebe, H. Yoshikawa: Effects of Orbital Motion on the Boundary Layer Flow on a Spinning Disk, Open Journal of Fluid Dynamics, vol.2, pp.181–186, (2012).

    Article  ADS  Google Scholar 

  5. H. Schlichting: “Boundary-Layer Theory”, McGrawhill, New York, pp.83–89, (1955).

    MATH  Google Scholar 

  6. S. P. Wilkinson and M. R. Malik: “Stability Experiments in the Flow over a Rotating Disk”, AIAA Journal, vol.23, No.4, pp.588–595, (1983).

    Article  ADS  Google Scholar 

  7. N. Itoh: “Theoretical Description of Instability Waves in Flow on a Rotating Disk”, Trans. Japan Soc. Aero. Space Sci, pp.262–279, (1997).

    Google Scholar 

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Authors and Affiliations

  1. Department of Mechanical System Engineering, Kumamoto University, 2-39-1 Kurokami, Chuo -ku, Kumamoto, 860-8555, Japan

    Mizue Munekata, Naoya Jobi, Keiichiro Kubo & Hiroyuki Yoshikawa

Authors
  1. Mizue Munekata
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  2. Naoya Jobi
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  3. Keiichiro Kubo
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  4. Hiroyuki Yoshikawa
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Additional information

This paper was supported by the National Natural Science Foundation of China (No. 51006090)

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Munekata, M., Jobi, N., Kubo, K. et al. Characteristics of transient vortices in the boundary layer on a rotating disk under orbital motion. J. Therm. Sci. 22, 600–605 (2013). https://doi.org/10.1007/s11630-013-0668-0

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  • DOI: https://doi.org/10.1007/s11630-013-0668-0

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