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Investigation of two plane paralleltiinven ilated jets

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Abstract

Measurements of mean velocity components, mean flow direction, turbulent intensities and Reynolds shear stress were made with a split film probe of hot wire anemometer to investigate the flow field generated by two identical jets of air issuing from plane parallel nozzles in a common end wall and mixing with the ambient room air. Due to the sensitivity of the split film probe to the flow direction, the reverse flow in the converging region was detected by the split film probe and observed by flow visualization. The mean velocity approaches self-preservation in both the converging and the combined regions, while the turbulent intensities and Reynolds shear stress approach self-preservation in the combined region only. The trajectory of the maximum velocity is almost unchanged by variance of nozzle spacing in the converging region. The distance of the merging point from the nozzle exit increases linearly with nozzle spacing. The spread of the converging jet increases more rapidly than that of the combined jet.

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Abbreviations

D :

nozzle width

O :

origin of the coordinates

S :

nozzle spacing

U, V, W :

mean velocities

U 0 :

axial velocity at nozzle exit

u, v, w :

velocity fluctuations in the X, Y, Z axis respectively

u′, v′, w′ :

rms of u, v, w

\(\overline {uv} \) :

Reynolds shear stress

X, Y :

Cartesian coordinate

Y * :

ordinate in the Y-axis start at maximum axial velocity of jet in each measured section

Xm, Ym :

ordinates at maximum axial velocity of jet in each measured section

Y 0.5 :

distance from the location of maximum axial velocity to the location where the velocity is half of maximum axial velocity in each measured section

η :

=Y/S

c.p. :

combining point

max:

maximum value

mp :

merging point

o :

nozzle exit plane

v.c. :

vortex center

References

  • Gutmark, E.; Wygnaski, I. 1976: The planar turbulent jets. J. Fluid Mech. 73, 465–495

    Google Scholar 

  • Krothapalli, A.; Baganoff, D.; Karamcheti, K. 1981: On the mixing of a rectangular jet. J. Fluid Mech. 107, 201–220

    Google Scholar 

  • Lin, Y. F. 1989: Interaction of two plane parallel dual-jet flows. Ph.D. Thesis, Dept. of Power Mech. Eng., National Tsing Hua University Taiwan

    Google Scholar 

  • Miller, D. R.; Comings, E. W. 1960: Force momentum fields in a dual-jet flow. J. Fluid Mech. 7, 237–256

    Google Scholar 

  • Tanaka, E. 1970: The interference of two-dimensional parallel jets. Bull. JSME, 13, 272–280

    Google Scholar 

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

    Google Scholar 

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Authors and Affiliations

  1. Dept. of Power Mechanical Engineering, National Tsing Hua University, Taiwan, R.O.C.

    Y. F. Lin & M. J. Sheu

Authors
  1. Y. F. Lin
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  2. M. J. Sheu
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Lin, Y.F., Sheu, M.J. Investigation of two plane paralleltiinven ilated jets. Experiments in Fluids 10, 17–22 (1990). https://doi.org/10.1007/BF00187867

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  • DOI: https://doi.org/10.1007/BF00187867

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