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Waves on water jets

Published online by Cambridge University Press:  12 April 2006

J. W. Hoyt  and
J. J. Taylor
J. W. Hoyt
Affiliation:
U. S. Naval Academy, Annapolis, Maryland 21402
J. J. Taylor
Affiliation:
Naval Ocean Systems Center, San Diego, California 92152
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Abstract

By the use of high-speed photography, instabilities occurring in high Reynolds number water jets discharging into air have been made visible. These instabilities include the axisymmetric mode accompanying the transition from laminar to turbulent flow at the nozzle exit, spray formation as a culmination of the axisymmetric disturbances, and, further downstream, helical disturbances which result in the entire jet assuming a helical form. The final disruption of the jet is due to amplification of the helical waves. It is further shown that the amplification of the helical disturbances is due in part to aerodynamic form drag, since jets discharging into surrounding air moving at the same speed as the jet remain relatively stable, compared with the case when the jet is discharged into stagnant air.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 83 , Issue 1 , 1 November 1977 , pp. 119 - 127
Copyright
© 1977 Cambridge University Press

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