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The influence of Reynolds number on a plane jet
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Image of FIG. 1.
FIG. 1.

The streamwise evolution of the centerline turbulence intensity of previous investigations of a turbulent plane jet. The legend lists the nozzle AR, jet exit Reynolds number , presence or absence of sidewalls in the plane, and nozzle-exit geometric profiles ( contraction; plate).

Image of FIG. 2.
FIG. 2.

A schematic of the present experimental setup, showing (a) the wind tunnel details and nozzle attachment, (b) the side view showing nozzle parameters and sidewalls, (c) the jet development characteristics, and (d) the measurement apparatus. Note that diagrams drawn are not to scale.

Image of FIG. 3.
FIG. 3.

Lateral profiles of (a) the normalized mean velocity and (b) the turbulence intensity measured for plane jets with different values.

Image of FIG. 4.
FIG. 4.

The evolution of mean centerline velocity for a plane jet with different values.

Image of FIG. 5.
FIG. 5.

The dependence of the jet’s potential core lengths on jet exit Reynolds number .

Image of FIG. 6.
FIG. 6.

The dependence of lateral profiles of on measured at .

Image of FIG. 7.
FIG. 7.

Dependence on of (filled symbols) and (open symbols) for and for two values of and .

Image of FIG. 8.
FIG. 8.

Lateral distributions of for : (a) , (b) , (c) , (d) , and (e) .

Image of FIG. 9.
FIG. 9.

(a) Streamwise evolution of for . (b) Dependence of the spreading rate and virtual origin on .

Image of FIG. 10.
FIG. 10.

Streamwise evolution of (a) the local Reynolds number for and (b) the data scaled according to Eq. (5).

Image of FIG. 11.
FIG. 11.

Streamwise evolution of for .

Image of FIG. 12.
FIG. 12.

Dependence on of and its axial location .

Image of FIG. 13.
FIG. 13.

dependence of the asymptotic value of and the axial location at which the turbulence intensity asymptotes for the cases (a) and (b) . Note that for , two nozzles of different exit areas ( and ) were tested.

Image of FIG. 14.
FIG. 14.

Streamwise evolutions of for . Symbols are identical to Fig. 11.

Image of FIG. 15.
FIG. 15.

Streamwise evolutions of for . Symbols are identical to Fig. 11.

Image of FIG. 16.
FIG. 16.

Dependence of the asymptotic value of and on .

Image of FIG. 17.
FIG. 17.

Streamwise evolution of (a) turbulent kinetic energy dissipation and (b) Kolmogorov scales for the present cases , 3000, and 7000, as well as those of Ref. 42.

Image of FIG. 18.
FIG. 18.

Streamwise evolutions of and for the present cases of and and for Ref. 10 and Ref. 7.

Image of FIG. 19.
FIG. 19.

Centerline spectra of the velocity fluctuation measured between and for (a) , (b) , (c), , (d) , (e) , and (f) a schematic of , showing the symmetric and antisymmetric modes based on previous observation of Ref. 6. Note that CL denotes the centerline.

Image of FIG. 20.
FIG. 20.

Dependence of the Strouhal number of the symmetric and antisymmetric modes on . Note that the values of and are those of corresponding to peaks of between and as indicated in Fig. 19 by dashed lines.

Image of FIG. 21.
FIG. 21.

Evolution of the centerline obtained at , 40, and 80 in the form of vs .

Image of FIG. 22.
FIG. 22.

Streamwise evolution of for obtained at , 40, and 80 in the form of vs .

Image of FIG. 23.
FIG. 23.

Dependence of on .


Generic image for table
Table I.

A summary of the normalized boundary layer characteristics estimated from mean velocity profiles at for different .


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The influence of Reynolds number on a plane jet