Skip to main content
×
Home
    • Aa
    • Aa
  • Get access
    Check if you have access via personal or institutional login
  • Cited by 1111
  • Cited by
    This article has been cited by the following publications. This list is generated based on data provided by CrossRef.

    Afsar, Mohammed Z. Sescu, Adrian and Leib, Stewart J. 2016. 22nd AIAA/CEAS Aeroacoustics Conference.

    Ahmed, Anwar and Weiner, Arthur J. 2016. Axisymmetric Jet Subjected to Radial and Azimuthal Forcing. Journal of Propulsion and Power, Vol. 32, Issue. 2, p. 311.


    Belotserkovskii, O. M. Fimin, N. N. and Chechetkin, V. M. 2016. Coherent hydrodynamic structures and vortex dynamics. Mathematical Models and Computer Simulations, Vol. 8, Issue. 2, p. 135.


    Benard, Nicolas Mizuno, Akira and Moreau, Eric 2016. 8th AIAA Flow Control Conference.

    Bhaumik, Swagata Gaitonde, Datta V. Goparaju, Kalyan Unnikrishnan, Sasidharan and Waindim, Mbu 2016. 46th AIAA Fluid Dynamics Conference.

    Bogey, Christophe and Marsden, Olivier 2016. 54th AIAA Aerospace Sciences Meeting.

    Bogey, Christophe and Marsden, Olivier 2016. Simulations of Initially Highly Disturbed Jets with Experiment-Like Exit Boundary Layers. AIAA Journal, Vol. 54, Issue. 4, p. 1299.


    Brès, Guillaume A. Jaunet, Vincent Le Rallic, Maxime Jordan, Peter Towne, Aaron Schmidt, Oliver Colonius, Tim Cavalieri, André V. and Lele, Sanjiva K. 2016. 22nd AIAA/CEAS Aeroacoustics Conference.

    Calvo, Esteban García, Juan A. Santolaya, José Luis García, Ignacio and Aísa, Luis 2016. Periodic structure of the dispersed phase in a forced jet and their effects on the particle dispersion. International Journal of Multiphase Flow, Vol. 82, p. 119.


    Cluts, Jordan D. Kuo, Ching-Wen and Samimy, Mo 2016. 22nd AIAA/CEAS Aeroacoustics Conference.

    Dairay, T. Roux, S. Fortuné, V. and Brizzi, L. E. 2016. On the Capability of PIV-Based Wall Pressure Estimation for an Impinging Jet Flow. Flow, Turbulence and Combustion, Vol. 96, Issue. 3, p. 667.


    Di Stazio, Annalisa Chauveau, Christian Dayma, Guillaume and Dagaut, Philippe 2016. Combustion in micro-channels with a controlled temperature gradient. Experimental Thermal and Fluid Science, Vol. 73, p. 79.


    Fénot, M. and Dorignac, E. 2016. Heat transfer and flow structure of an impinging jet with upstream flow. International Journal of Thermal Sciences, Vol. 109, p. 386.


    Fu, Zhidong Agarwal, Anurag Cavalieri, André V. Jordan, Peter and Brès, Guillaume A. 2016. 22nd AIAA/CEAS Aeroacoustics Conference.

    Fu, Zhidong Agarwal, Anurag Cavalieri, André V. Jordan, Peter Lehnasch, Guillaume and Daviller, Guillaume 2016. 22nd AIAA/CEAS Aeroacoustics Conference.

    Ghadi, Sina Esmailpour, Kazem Hosseinalipour, Mostafa and Kalantar, Mehrdad 2016. Dynamical Study of Pulsed Impinging Jet with Time Varying Heat Flux Boundary Condition. Heat Transfer-Asian Research, Vol. 45, Issue. 1, p. 85.


    Ghadi, Sina Esmailpour, Kazem Hosseinalipour, S.M. and Mujumdar, Arun 2016. Experimental study of formation and development of coherent vortical structures in pulsed turbulent impinging jet. Experimental Thermal and Fluid Science, Vol. 74, p. 382.


    Ghadimi, Masoud Farshchi, Mohammad and Hejranfar, Kazem 2016. On spatial filtering of flow variables in high-order finite volume methods. Computers & Fluids, Vol. 132, p. 19.


    Gloor, Michael Bühler, Stefan and Kleiser, Leonhard 2016. Transition to turbulence and noise radiation in heated coaxial jet flows. Physics of Fluids, Vol. 28, Issue. 4, p. 044103.


    Goldstein, Marvin E. and Leib, Stewart J. 2016. 22nd AIAA/CEAS Aeroacoustics Conference.

    ×

Orderly structure in jet turbulence

  • S. C. Crow (a1) and F. H. Champagne (a1)
  • DOI: http://dx.doi.org/10.1017/S0022112071001745
  • Published online: 01 March 2006
Abstract

Past evidence suggests that a large-scale orderly pattern may exist in the noiseproducing region of a jet. Using several methods to visualize the flow of round subsonic jets, we watched the evolution of orderly flow with advancing Reynolds number. As the Reynolds number increases from order 102 to 103, the instability of the jet evolves from a sinusoid to a helix, and finally to a train of axisymmetric waves. At a Reynolds number around 104, the boundary layer of the jet is thin, and two kinds of axisymmetric structure can be discerned: surface ripples on the jet column, thoroughly studied by previous workers, and a more tenuous train of large-scale vortex puffs. The surface ripples scale on the boundary-layer thickness and shorten as the Reynolds number increases toward 105. The structure of the puffs, by contrast, remains much the same: they form at an average Strouhal number of about 0·3 based on frequency, exit speed, and diameter.

To isolate the large-scale pattern at Reynolds numbers around 105, we destroyed the surface ripples by tripping the boundary layer inside the nozzle. We imposed a periodic surging of controllable frequency and amplitude at the jet exit, and studied the response downstream by hot-wire anemometry and schlieren photography. The forcing generates a fundamental wave, whose phase velocity accords with the linear theory of temporally growing instabilities. The fundamental grows in amplitude downstream until non-linearity generates a harmonic. The harmonic retards the growth of the fundamental, and the two attain saturation intensities roughly independent of forcing amplitude. The saturation amplitude depends on the Strouhal number of the imposed surging and reaches a maximum at a Strouhal number of 0·30. A root-mean-square sinusoidal surging only 2% of the mean exit speed brings the preferred mode to saturation four diameters downstream from the nozzle, at which point the entrained volume flow has increased 32% over the unforced case. When forced at a Strouhal number of 0·60, the jet seems to act as a compound amplifier, forming a violent 0·30 subharmonic and suffering a large increase of spreading angle. We conclude with the conjecture that the preferred mode having a Strouhal number of 0·30 is in some sense the most dispersive wave on a jet column, the wave least capable of generating a harmonic, and therefore the wave most capable of reaching a large amplitude before saturating.

Copyright
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Fluid Mechanics
  • ISSN: 0022-1120
  • EISSN: 1469-7645
  • URL: /core/journals/journal-of-fluid-mechanics
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×
MathJax