Some Measurements in Multiple Jets

  • B. T. KannanEmail author
Part of the Green Energy and Technology book series (GREEN)


The present work reports the evolution of multiple turbulent jets that emanate from axisymmetric nozzles arranged in a particular configuration. Five cases are considered for this present work. A Reynolds number of 25,000 based on the equivalent diameter is kept constant for all the cases. The measurements along the geometric centreline provide axial evolution. Profiles of measured mean axial velocity show the merger and growth of multiple jets at various axial downstream locations. Non-linear behaviour of multiple jets is found in the near-field region. The evolutions of flow from nozzle configurations with and without central jets are found to be different.


Multiple jets Axisymmetric nozzles Measurements 



This research was supported by yearly research fund provided by the Department of Aerospace Engineering at IIT Madras. The guidance of Prof. Panchapakesan N.R. and the support from workshop and other research scholars are gratefully acknowledged.


  1. Antonia, R.A., Zhao, Q.: Effect of initial conditions on a circular jet. Exp. Fluids. 31(3), 319–323 (2001)CrossRefGoogle Scholar
  2. Ball, C.G., Fellouah, H., Pollard, A.: The flow field in turbulent round free jets. Prog. Aerosp. Sci. 50, 1–26 (2012)CrossRefGoogle Scholar
  3. Lipari, G., Stansby, P.K.: Review of experimental data on incompressible turbulent round jets. Flow Turbul. Combust. 87(1), 79–114 (2011)CrossRefGoogle Scholar
  4. Nastase, I., Meslem, A.: Vortex dynamics and mass entrainment in turbulent lobed jets with and without lobe deflection angles. Exp. Fluids. 48(4), 693–714 (2009)CrossRefGoogle Scholar
  5. Panchapakesan, N.R., Lumley, J.L.: Turbulence measurements in axisymmetric jets of air and helium. Part 1. Air jet. J. Fluid Mech. 246, 197 (1993)CrossRefGoogle Scholar
  6. Quinn, W.R., Militzer, J.: Experimental and numerical study of a turbulent free square jet. Phys. Fluids. 31(5), 1017 (1988)CrossRefGoogle Scholar
  7. Quinn, W.R.: Measurements in the near flow field of an isosceles triangular turbulent free jet. Exp. Fluids. 39(1), 111–126 (2005)CrossRefGoogle Scholar
  8. Quinn, W.R.: Upstream nozzle shaping effects on near field flow in round turbulent free jets. Eur. J. Mech. B Fluids. 25(3), 279–301 (2006)CrossRefGoogle Scholar
  9. Quinn, W.R.: Experimental study of the near field and transition region of a free jet issuing from a sharp-edged elliptic orifice plate. Eur. J. Mech. B Fluids. 26(4), 583–614 (2007)CrossRefGoogle Scholar
  10. Quinn, W.R., Azad, M.: Mean flow and turbulence measurements in a turbulent free cruciform jet. Flow Turbul. Combust. 91(4), 773–804 (2013)Google Scholar
  11. Quinn, W.R., Azad, M., Groulx, D.: Mean streamwise centreline velocity decay and entrainment in triangular and circular jets. AIAA J. 51(1), 70–79 (2013)CrossRefGoogle Scholar
  12. Ricou, F.P., Spalding, D.B.: Measurements of entrainment by axisymmetrical turbulent jets. J. Fluid Mech. 11, 21–32 (1960)CrossRefGoogle Scholar
  13. Wygnanski, I., Fiedler, H.: Some measurements in the self-preserving jet. J. Fluid Mech. 38, 577–612 (1969)CrossRefGoogle Scholar

Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Aerospace EngineeringIndian Institute of Technology – MadrasChennaiIndia

Personalised recommendations