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Observations of oscillatory motion in certain swirling flows

Published online by Cambridge University Press:  28 March 2006

Robert C. Chanaud
Robert C. Chanaud
Affiliation:
Research Division, American Radiator and Standard Sanitary Corp., New Brunswick, New Jersey
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Abstract

A descriptive experimental study was made in both air and water of the temporally periodic motion that occurs in the vortex whistle and cyclone separator. The motion can be described in terms of an oscillator that derives its energy from hydrodynamic instability of the steady swirling flow and whose frequency is determined by an angular velocity characteristic of this steady flow. The relevant dynamical parameters are the Rossby number and Reynolds number for the steady flow with the addition of the Strouhal number for the time-dependent flow. The results of this study were compared with the vortex breakdown phenomenon over swept-back wings. Breakdown can be described in the same terms as for the other two cases and it appears that all three motions are basically the same.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 21 , Issue 1 , January 1965 , pp. 111 - 127
Copyright
© 1965 Cambridge University Press

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References

Benjamin, T. B. 1962 Theory of the vortex breakdown phenomenon. J. Fluid Mech. 14, 593.Google Scholar
Bodewadt, U. T. 1940 The rotating flow over a fixed surface. Z. angew. Math. Mech. 20, 241.Google Scholar
Chanaud, R. C. 1963 Experiments concerning the vortex whistle. J. Acoust. Soc. Amer. 35, 953.Google Scholar
Gartshore, I. S. 1962 Recent work in swirling incompressible flow. Nat. Res. Counc. (Canada) Aero. Rep. LR-343.Google Scholar
Gore, R. W. & Ranz, W. E. 1964 Backflows in rotating fluids moving axially through expanding cross sections. Amer. Inst. Chem. Engrs. J. 10, 83.Google Scholar
Hama, F. R. 1962 Streaklines in a perturbed shear flow. Phys. Fluids, 5, 644.Google Scholar
Harvey, J. K. 1962 Some observations of the vortex breakdown phenomenon. J. Fluid Mech. 14, 585.Google Scholar
Howard, L. N. 1963 Fundamentals of the theory of rotating fluids. J. Appl. Mech. 30, 485.Google Scholar
Howard, L. N. & Gupta, A. S. 1962 On the hydrodynamic and hydromagnetic stability of swirling flows. J. Fluid Mech. 14, 463.Google Scholar
Lambourne, N. C. & Bryer, D. W. 1962 The bursting of leading-edge vortices-some observations and discussion of the phenomenon. Aero. Res. Counc., U.K., R. & M. 3282.Google Scholar
Lay, J. E. 1959 An experimental and analytical study of vortex flow temperature separation by superposition of spiral and axial flow. J. Basic Engr, 81, 1.Google Scholar
Powell, A. 1961 On the edge tone. J. Acoust. Soc. Amer. 33, 395.Google Scholar
Smith, J. L. 1962a An experimental study of the vortex in the cyclone separator. J. Basic Engr, 84, 602.Google Scholar
Smith, J. L. 1962b An analysis of the vortex flow in cyclone separator. J. Basic Engr, 84, 609.Google Scholar
Squire, H. B. 1960 Analysis of the ‘Vortex Breakdown’ phenomenon, Part I. Imperial Coll. Sci. Tech., Lond., Rep. no. 102.Google Scholar
Suzuki, M. 1960 Theoretical and experimental studies on the vortex tube. Sci. Pap. Inst. Phys. Chem. Res., Tokyo, 54, 43.Google Scholar
Vonnegut, B. 1954 A vortex whistle. J. Acoust. Soc. Amer. 26, 18.Google Scholar