Summary
Low order azimuthal modes of jet instability are introduced acoustically using an azimuthal array of speakers. The evolution of axisymmetric and helical instabilities, excited at the frequency of the preferred mode, are mapped along the potential core region. The amplification of the axisymmetric mode is much stronger than the helical mode and the agreement between phase locked measurements and stability predictions is much better. Phase-locked measurements of the helical instability show evidence of resonant interaction with other azimuthal modes.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
Wygnanski, I.; Petersen, K.A.: Coherent motion in excited free shear flows. AIAA J., accepted.
Petersen, R.A.; Samet, M.M.: On the preferred mode of jet instability. J. Fluid Mech., submitted.
Samet, M.M.; Petersen, R.A.: Effects of forcing level on the axisymmetric mixing layer. Bull. Am. Phys. Soc. 31 (1986) 1678.
Strange, P.J.K.; Crighton, D.G.: Spinning modes on axisymmetric jets. Part 1. J. Fluid Mech. 134 (1983) 231–245.
Batchelor, G.K.; Gill, A.E.: Analysis of the stability of axisymrnetric jets. J. Fluid Mech. 14 (1962) 529–551.
Morris, P.J.: The spatial viscous instability of axisymmetric jets. J. Fluid Mech. 77 (1976) 511–529.
Chan, Y.Y.: Wavelike eddies in a turbulent jet. AIAA J. 15 (1977) 992–1001.
Crow, S.C.; Champagne, F.H.: Orderly structure in jet turbulence. J. Fluid Mech. 48 (1971) 547–591.
Gutmark, E.; Ho., C.M.: On the preferred modes and the spreading rates of jets. Phys. Fluids 26 (1983) 2932–2938.
Lessen, M.; Sadler, S.G.; Liu, T.Y.: Stability of pipe Poiseuille flow. Phys. Fluids 11 (1968) 1404–1408.
Lessen, M.; Singh, P.J.: The stability of axisymmetric free shear layers. J. Fluid Mech. 60 (1973) 433–457.
Gaster, M.; Kit, E.; Wygnanski, I.: Large-scale structures in a forced turbulent mixing layer. J. Fluid Mech. 150 (1985) 23–39.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1988 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Petersen, R.A., Samet, M.M., Long, T.A. (1988). Excitation of Azimuthal Modes in an Axisymmetric Jet. In: Liepmann, H.W., Narasimha, R. (eds) Turbulence Management and Relaminarisation. International Union of Theoretical and Applied Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-83281-9_29
Download citation
DOI: https://doi.org/10.1007/978-3-642-83281-9_29
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-83283-3
Online ISBN: 978-3-642-83281-9
eBook Packages: Springer Book Archive