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Similarity in the initial region of annular jets: three configurations

Published online by Cambridge University Press:  12 April 2006

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

This paper describes part of a detailed study of the initial region of three annular jets. The configurations are the basic one, without any bullet in the centre, and those with a conical and an elliptical bullet. From the mean velocity and turbulence intensity measurements the initial region can be divided into the initial merging, the intermediate and the fully merged zones. Within these three zones similarity of both the mean velocity and the turbulence intensity profiles has been found. The similarity curves are compared with those for a single jet.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 84 , Issue 4 , 27 February 1978 , pp. 641 - 656
Copyright
© 1978 Cambridge University Press

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References

Abramovich, N. 1963 The Theory of Turbulent Jets. M.I.T. Press.
Ayukawa, K. & Shakouchi, T. 1976 Analysis of a jet attaching to an offset parallel plate. Bull. Japan Soc. Mech. Engrs 19, 395–401.Google Scholar
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 86, 794–804.Google Scholar
Davies, P. O. A. L. & Davis, M. R. 1966 Hot-wire anemometer. Inst. Sound Vib. Res., Univ. Southampton Rep. no. 155.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
Eldred, K. M. et al. 1971 Far-field noise generation by coaxial flow jet exhaust. 1. Detailed discussion. Wyle Lab. Rep. no. FAA-RD-71- 101, p. 1.Google Scholar
Ko, N. W. M. & Davies, P. O. A. L. 1971 The near field within the potential cone of subsonic cold jets. J. Fluid Mech. 50, 49–78.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
Laurence, J. C. 1956 Intensity, scale and spectra of turbulence in the mixing region of a free subsonic jet. N.A.C.A. Rep. no. 1292.Google Scholar
Miller, D. & Comings, E. W. 1960 Force-momentum fields in a dual-jet flow. J. Fluid Mech. 7, 237–256.Google Scholar
Mollo-Christensen, E., Kolpin, M. A. & Martuccelli, J. R. 1964 Experiments on jet flows and jet noise for field spectra and directivity patterns. J. Fluid Mech. 18, 285–301.Google Scholar