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Vortex dynamics and entrainment mechanisms in low Reynolds orifice jets

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Abstract

Classical planar 2D-PIV measurements and time-resolved visualizations enriched by low-level processing are used for the reconstruction of the Kelvin-Helmholtz vortex passing in the near field of a circular and a 6-lobed orifice jet flow. In the circular jet, the entrainment is produced in the braid region, being interrupted in the presence of the Kelvin-Helmholtz ring. The latter compresses the streamwise vortices and alters their self-induction role. Conversely, the 6-lobed orifice geometry allows the cutting of the Kelvin-Helmholtz structures into discontinuous ring segments. Consequently, into these discontinuity regions streamwise large scale structures are developing. These streamwise structures are permanent thus controlling and enhancing the jet entrainment which is not altered by the Kelvin-Helmholtz structures passing.

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References

  • Belovich, V. M. and Samimy, M., Mixing processes in a coaxial geometry with a central lobed mixer-nozzle, AIAA Journal, 35-5 (1997), 838–841.

    Article  Google Scholar 

  • Bernal, L. P. and Roshko, A., Streamwise vortex structures in plane mixing layers, Journal of Fluid Mechanics, 170 (1986), 499–525.

    Article  Google Scholar 

  • Browand, F. K. and Laufer, J., The role of large scale structures in the initial development of circular jets, Proceedings of 4th symposium on the turbulence in liquids, University of Missouri, (1975), 333–334.

  • Brown, G. L. and Roshko, A., On density effects and large structures in turbulent mixing layers, Journal of Fluid Mechanics, 64-4 (1974), 775–816.

    Article  Google Scholar 

  • Christman, P. J. and Podzimek, J., Hot-wire anemometer behaviour in low velocity air flow, Journal of Physics E: Scientific Instruments, 14 (1980), 46–51.

    Article  Google Scholar 

  • Collis, D. C. and Williams, M. J., Two-dimensionnal convection from heated wires at low Reynolds numbers, Journal of Fluid Mechanics, 6 (1959), 357–384.

    Article  MATH  Google Scholar 

  • Hernan, M. A. and Jimenez, J., Computer analysis of a high-speed film of the plane turbulent mixing layer, Journal of Fluid Mechanics, 119 (1982), 323–345.

    Article  Google Scholar 

  • Ho, C. M. and Gutmark, E., Vortex induction and mass entrainment in a small-aspect-ratio elliptic jet, Journal of Fluid Mechanics, 179 (1987), 383–405.

    Article  Google Scholar 

  • Hu, H., Kobayashi, T., Saga, T. Sagawa, S. and Taniguchi, N., Particle Image Velocimetry and Planar Laser Induced Fluorescence Measurements on Lobed Jet Mixing Flows, Experiments in Fluids (Suppl.), (2000), S141–S157.

  • Hu, H., Saga, T., Kobayashi, T., and Taniguchi, N., A Study on a Lobed Jet Mixing Flow by Using Stereoscopic Particle Image Velocimetry Technique, Physics of Fluids, 13-11 (2001), 3425–3441.

    Article  Google Scholar 

  • Hu, H., Saga, T., Kobayashi, T., and Taniguchi, N., Mixing Process in a Lobed Jet Flow, AIAA Journal, 40-7 (2002), 1339–1345.

    Article  Google Scholar 

  • Hu, H., Saga, T., Kobayashi, T., and Taniguchi, N., Analysis of a turbulent jet mixing flow by using a PIV-PLIF combined system, Journal of Visualization, 7-1 (2004), 33–42.

    Article  Google Scholar 

  • Jorgensen, F. E., Directional sensitivity of wire and fiber film, DISA Information, 11 (1971), 31–37.

    Google Scholar 

  • Konrad, J. H., An experimental investigation of mixing in two dimensional turbulent shear flows with applications to diffusion-limited chemical reactions, (1977), PhD thesis, Pasadena, California Institute of Technology.

  • Kuchar, A. P. and Chamberlin, R., Scale model performance tests investigation of exhaust system mixers for an energy efficient engine, AIAA Paper 80-0229, (1980).

  • Liepmann, D., Streamwise vorticity and entrainement in the near field of a round jet, Physics of Fluids, 3–5 (1991), 1179–1185.

    Google Scholar 

  • Liepmann, D. and Gharib, M., The role of streamwise vorticty in the near field entrainement of round jets, Journal of Fluid Mechanics, 245 (1992), 642–668.

    Article  Google Scholar 

  • Loiseleux, T. and Chomaz, J.-M., Experimental study of secondary instability selection mechanisms in round jets, Colloque Structure et dynamique de vortex, Rouen (1999).

  • Mao, R. H., Yu, S.C., and Chua, L. P., Kelvin-Helmholtz and streamwise vortices in the near wake of a single lobe forced mixer, Journal of Aerospace Engineering — part G, 220-4 (2006), 279–298.

    Article  Google Scholar 

  • Nastase, I. and Meslem, A., Passive control of jet flows using lobed nozzle geometries, Mécanique et Industries, 8 (2007), 101–109.

    Article  Google Scholar 

  • Paterson, R. W., Turbofan forced mixer nozzle flowfield — A benchmark experimental study, ASME Journal of Engineering and Gas Turbines Power, 106 (1984), 692–698.

    Article  Google Scholar 

  • Presz, W. Jr., Gousy, R. and Morin, B., Forced Mixer Lobes in Ejector Designs, AIAA Paper 86-1614, (1986).

  • Presz, W. Jr., Reynolds, G., and Hunter, C., Thrust augmentation with mixer-ejector-diffusers systems, AIAA Paper 94-0020, (1994).

  • Presz, W. Jr., Reynolds, G. and Mc Cormick, D., Thrust augmentation using mixer/ejector systems, 40th AIAA Aerospace Sciences Meeting and Exhibit (Reno), (2002).

  • Ramesh, G., Venkatakrishnan, L. and Prabhu, A., PIV studies of large scale structures in the near field of small aspect ratio elliptic jet, Journal of Visualization 9-1 (2006), 23–30.

    Article  Google Scholar 

  • Romano, G. P., The effect of boundary conditions by the side of the nozzle of a low Reynolds number jet. Experiments in Fluids 33 (2002), 323–333.

    Google Scholar 

  • Suprayan, R. and Fiedler, H. E., On streamwise vortical structures in the near-field of axisymmetric shear layers, Meccanica, 29-4 (1994), 403–410.

    Article  Google Scholar 

  • Widnall, S. E. and Sullivan, J. P., On the stability of vortex rings, Proceedings of the Royal Society of London, 332–1950 (1973), 335–353.

    Google Scholar 

  • Winant, C. D. and Brownant, F. K., Vortex pairing: the mechanism of turbulent mixing layer growth at moderate Reynolds number, Journal of Fluid Mechanics, 68-2 (1974), 287–255.

    Google Scholar 

  • Yuan, Y., Jet Fluid Mixing Control Through Manipulation of Inviscid Flow Structures, Ph.D. Thesis, Virginia Polytechnic Institute and State University, (2000).

  • Yule, A. J., Large scale structure in the mixing layer of a round jet, Journal of Fluid Mechanics 89–413 (1978), 413–432.

    Article  Google Scholar 

  • Zaman, K. B. M. Q., Axis switching and spreading of an asymmetric jet: the role of coherent structure dynamics, Journal of Fluid Mechanics 316-1 (1996a), 1–27.

    Article  Google Scholar 

  • Zaman, K. B. M. Q., Spreading characteristics and thrust of jets from asymmetric nozzles, AIAA Paper No 96-0200, (1996b).

  • Zaman, K. B. M. Q., Spreading characteristics of compressible jets from nozzles of various geometries, Journal of Fluid Mechanics, 383 (1999), 197–228.

    Article  MATH  Google Scholar 

  • Zaman, K. B. M. Q. and A. K. M. F. Hussain, Vortex pairing in a circular jet under controlled excitation. Part 1. General response, Journal of Fluid Mechanics, 101-3 (1980), 449–491.

    Article  Google Scholar 

  • Zaman, K.B.M.Q., Reeder, M. F. and Samimy, M., Control of axisymmetric jet using vortex generators, Physics of Fluids, 6-2 (1994), 778–793.

    Article  Google Scholar 

  • Zaman, K. B. M. Q., Wang, F. Y, and Georgiadis, N. J., Noise, Turbulence and Thrust of Subsonic Free Jets from Lobed Nozzles, AIAA Journal, 41-3 (2003), 398–407.

    Article  Google Scholar 

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Authors and Affiliations

  1. LEPTAB, University of La Rochelle, av. Michel Crépeau, 17042, La Rochelle, France

    Nastase I. & Meslem A.

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  1. Nastase I.
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  2. Meslem A.
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Correspondence to Nastase I..

Additional information

Ilinca Nastase: She received her Ph.D. degree in July 2007 from the University of La Rochelle. Since the start of her Ph.D. program she works at the Laboratory of Studies of Transfer Phenomena Applied to Buildings (abbreviated LEPTAB in French). Her research interests include experimental analysis and passive control of turbulent flows.

Amina Meslem: She received her Ph.D. degree in 1997, at the Thermal Sciences Centre of Lyon (abbreviated CETHIL in French) research Laboratory of the Engineering University, INSA Lyon (Institut National des Sciences Appliquées de Lyon). Since her Ph.D. program, she has been working as Assistant Professor in the Civil and Mechanical Engineering Department of the University of La Rochelle, in the LEPTAB laboratory. Her current research interests include experimental analysis and passive control of turbulent flows.

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Nastase, I., Meslem, A. Vortex dynamics and entrainment mechanisms in low Reynolds orifice jets. J Vis 11, 309–318 (2008). https://doi.org/10.1007/BF03182199

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  • DOI: https://doi.org/10.1007/BF03182199

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