Skip to main content
SpringerLink
Log in

The interaction of two opposing, asymmetric curved wall jets

  • Originals
  • Published:
Experiments in Fluids Aims and scope Submit manuscript

Abstract

An experimental investigation was made of a two dimensional flow formed by the interaction of two asymmetric turbulent curved wall jets past a circular cylinder. Measurements were made of velocity and turbulence intensity profiles of the two curved wall jets before the interaction, and those of the merged jet after the interaction. The location of the interaction region of the two opposing curved wall jets and the flow direction of the merged jet were found to depend primarily on the ratio of initial momentum fluxes. The velocity and turbulence intensity profiles of the merged jet were similar to those of the plane turbulent jet. However, the growth rate of the merged jet was approximately 1.5 times larger than that of the plane jet. The influence of the momentum flux ratio on the growth rate appeared to be insignificant.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Abbreviations

C f :

friction coefficient

h :

slot height

J p, J c :

initial momentum flux of a power jet and of a control jet, respectively

P, Pa :

wall static and atmospheric pressure, respectively

Re :

Reynolds number based on slot height

Re m :

local Reynolds number U m y m /v

U :

local mean velocity

U c :

velocity along the center line of the merged jet

U m :

local maximum velocity of the curved wall jet

u′ :

r.m.s. value of velocity fluctuations

u u :

friction velocity

U + :

U/ut

x :

distance along the cylinder surface

x′ :

distance along the center line of the merged jet

y 1/2, y′ 1/2 :

position of y and y′ where U = U m /2 and U = U c /2, respectively

y + :

yu t/V

α :

deflection angle of the merged jet (Fig. 4)

β :

interaction angle (Fig. 4)

δ :

merged jet angle (Fig. 4)

θ :

angle measured from the center line of the cylinder (Fig. 4)

μ :

interception angle (Fig. 8)

ξ,η :

normalized coordinates, y/y 1/2 and y′/y′ 1/2, respectively

References

  • Alcaraz, E.; Charnay, G.; Mathieu, J. 1977: Measurements in a wall jet over a convex surface. Phys. Fluids 20, 203–210

    Google Scholar 

  • Bradbury, L. J. S. 1965: The structure of a self-preserving turbulent plane jet. J. Fluid Mech. 23, 31–64

    Google Scholar 

  • Bradshaw, P.; Gee, M. T. 1960: Turbulent wall jets with and without an external stream. Aeronaut. Res. Counc. R & M 3252

  • Dakos, T.; Verriopoulos, C. A.; Gibson, M. M. 1984: Turbulent flow with heat transfer in plane and curved wall jets. J. Fluid Mech. 145, 339–360

    Google Scholar 

  • Elbanna, H.; Gahin, S.; Rashed, M. I. I. 1983: Investigation of two plane parallel jets. AIAA J. 21, 986–991

    Google Scholar 

  • Elbanna, H.; Sabbagh, J. A. 1986: Interaction of two nonequal jets. AIAA J. 24, 686–687

    Google Scholar 

  • Enokida, K.; Okamoto, T. 1984: Oblique impingement of two turbulent plane free jets. Bull. JSME 27, 419–425

    Google Scholar 

  • Fernholz, H. H. 1978: External flows. In: Turbulence (ed. Bradshaw, P.), pp. 45–107. Berlin, Heidelberg, New York: Springer

    Google Scholar 

  • Guitton, D. E.; Newmann, B. G. 1977: Self-preserving turbulent wall jets over convex surfaces. J. Fluid Mech. 81, 155–185

    Google Scholar 

  • Hussain, A. K. M. F.; Zedan, M. F. 1978: Effects of the initial condition in the axisymmetric free shear layer: Effects of the initial fluctuation level. Phys. Fluids 21, 1475–1481

    Google Scholar 

  • Irwin, H. P. A. H. 1973: Measurements in a self-preserving plane wall jet in a positive pressure gradient. J. Fluid Mech. 61, 33–63

    Google Scholar 

  • Kind, R. J.; Suthanthiran, K. 1973: The interaction of two opposing plane wall jets. J. Fluid Mech. 58, 389–402

    Google Scholar 

  • Launder, B. E.; Rodi, W. 1983: The turbulent wall jet-measurements and modeling. Ann. Rev. Fluid Mech. 15, 429–459

    Google Scholar 

  • Lee, D. H.; Chung, M. K. 1983: Interaction of a pair of curved wall jets after a circular cylinder. AIAA Pap. 83-0290

  • Murai, K.; Taga, M.; Akagawa, K. 1976: An experimental study on confluence of two-dimensional jets. Bull. JSME 17, 958–964

    Google Scholar 

  • Novak, C. J.; Cornelius, K. C.; Roads, R. K. 1987: Experimental investigations of the circular wall jet on a circulation control airfoil. AIAA Pap. 87-0155

  • Park, S. O.; Kim, M. S. 1984: Experimental study on the multi-directional property of coanda nozzle jet. J. Korean Soc. Aeronaut. Space Sci. 12, 23–29

    Google Scholar 

  • Purtell, L. P.; Klebanoff, P. S.; Buckley, F. T. 1981: Turbulent boundary layer at low Reynolds number. Phys. Fluids 24, 802–811

    Google Scholar 

  • Ramaprian, B. R.; Chandrasekhara, M. S. 1985: LDA measurements in plane turbulent jets. J. Fluids Eng. 107, 264–271

    Google Scholar 

  • Rew, H. S. 1986: The interaction of two opposing curved wall jets. M.S. Thesis, Korean Advanced Institute of Science and Technology

  • Tanaka, E. 1974: The interaction of two-dimensional parallel jets. Bull. JSME 17, 920–927

    Google Scholar 

  • Tanney, J. W. 1969: Fluidics. Prog. Aeronaut. Sci. 10, 401–509

    Google Scholar 

  • Wilson, D. J.; Goldstein, R. J. 1976: Turbulent wall jets with cylindrical streamwise surface curvature. J. Fluids Eng. 96, 550–557

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Dept. of Mechanical Engineering, Aerospace Program, Korea Advanced Institute of Science and Technology, P.O. Box 150, Cheong Ryang, Seoul, Korea

    H. S. Rew & S. O. Park

Authors
  1. H. S. Rew
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. S. O. Park
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Rew, H.S., Park, S.O. The interaction of two opposing, asymmetric curved wall jets. Experiments in Fluids 6, 243–252 (1988). https://doi.org/10.1007/BF00187364

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00187364

Keywords

Search

Navigation