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Coherent structures in the outer mixing region of annular jets

Published online by Cambridge University Press:  19 April 2006

W. T. Chan  and
N. W. M. Ko
W. T. Chan
Affiliation:
Department of Mechanical Engineering, University of Hong Kong
N. W. M. Ko
Affiliation:
Department of Mechanical Engineering, University of Hong Kong
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Abstract

This paper describes in detail the overall pressure and spectral results in the outer mixing region of three annular jets. The outer mixing region can be considered as the result of the shearing of a single jet by the ambient air. The coherent structures found consist of an array of toroidal jet vortices convecting downstream in the outer mixing region. The structures tend to agree with the ones for a single jet.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 89 , Issue 3 , 13 December 1978 , pp. 515 - 533
Copyright
© 1978 Cambridge University Press

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References

Abramovich, N. 1963 The Theory of Turbulent Jets. M.I.T. Press.
Beer, J. M. & Chigier, N. A. 1972 Combustion Aerodynamics. Applied Science Publishers.
Bradshaw, P., Ferriss, D. H. & Johnson, H. F. 1964 Turbulence in the noise-producing region of a circular jet. J. Fluid Mech. 19, 591–624.Google Scholar
Carmody, T. 1964 Establishment of the wake behind a disk. Trans. A.S.M.E., J. Basic Engng D 86, 869–882.Google Scholar
Chan, W. T. 1977 Flow structures of annular jets. M.Ph. thesis, University of Hong Kong.
Chigier, N. A. & Beer, J. M. 1964 The flow region near the nozzle in double concentric jets. Trans. A.S.M.E., J. Basic Engng D 86, 797–804.Google Scholar
Crow, S. C. & Champagne, G. H. 1971 Orderly structure in jet turbulence. J. Fluid Mech. 48, 547–591.Google Scholar
Davies, P. O. A. L., Fisher, M. J. & Barratt, M. J. 1963 The characteristics of the turbulence in the mixing region of a round jet. J. Fluid Mech. 15, 337–367.Google Scholar
Davies, T. W. & Beer, J. M. 1969 The turbulence characteristics of annular wake flow. Heat Mass Transfer in Flows with Separated Regions, Int. Sem., Hercig-Novi, Yugoslavia,Google Scholar
Fisher, M. J. & Davies, P. O. A. L. 1964 Correlation measurements in a non-frozen pattern of turbulence. J. Fluid Mech. 18, 97–116.Google Scholar
Fuchs, H. V. 1972 Measurements of pressure fluctuations within subsonic turbulent jets. J. Sound Vib. 22, 361–378.Google Scholar
Ko, N. W. M. & Chan, W. T. 1978 Similarity in the initial region of annular jets: three configurations. J. Fluid Mech. 84, 641–656.Google Scholar
Ko, N. W. M. & Davies, P. O. A. L. 1971 The near field within the potential core of subsonic cold jets. J. Fluid Mech, 50, 49–78.Google Scholar
Ko, N. W. M. & Davies, P. O. A. L. 1975 Some covariance measurements in a subsonic jets. J. Sound Vib. 41, 347–358.Google Scholar
Ko, N. W. M. & Kwan, A. S. H. 1976 The initial region of subsonic coaxial jets. J. Fluid Mech. 73, 305–332.Google Scholar
Kwan, A. S. H. & Ko, N. W. M. 1976 Coherent structures in subsonic coaxial jets. J. Sound Vib. 48, 203–219.Google Scholar
Kwan, A. S. H. & Ko, N. W. M. 1977 Covariance measurement in the initial region of coaxial jet. J. Sound Vib. 52, 567–578.Google Scholar
Lau, J. C. 1971 The coherent structure of jets. Ph.D. thesis, University of Southampton.
Lau, J. C., Fisher, M. J. & Fuchs, H. V. 1972 The intrinsic structure of turbulent jets. J. Sound Vib. 22, 379–406.Google Scholar
Miller, D. R. & Comings, E. W. 1960 Force-momentum fields in a dual-jet flow. J. Fluid Mech. 7, 247–256.Google Scholar
Vanderbury, W. H. 1973 Applications of dual jet flows to fluidics. Ph.D. thesis, University of Waterloo.
Williams, T. J., Ali, M. R. M. H. & Anderson, J. S. 1969 Noise and flow characteristics of coaxial jets. J. Mech. Engng Sci. 11, 133–142.Google Scholar