Schematic of the experimental arrangement (left) and three-dimensional square jet nozzle exit, jet notation and coordinate system (right).
Inflow conditions at x/D e = 0.05 for different Reynolds numbers. (a) Normalized mean velocity; (b) turbulence intensity. Note that the inset panel indicates location (Y) used for integral calculations (see Eqs. (4) and (5) ).
Streamwise variations of U j /U c for Re = 8000 ∼ 50 000.
Dependence on Re of K U (open symbol) and x U /D e (closed symbol).
Lateral distributions of U/U c for Re = 8000–50 000.
Streamwise variations of R 1/2 /D e for Re = 8000 ∼ 50 000.
Dependence of the spreading rate (K Y ) and virtual origin (x R /D e ) on Re d .
Normalized streamwise RMS velocity u ′/U c along the centreline.
Re dependence of the asymptotic value of turbulence intensity.
Lateral distributions of u ′/U c for (a) Re = 8000, (b) = 12 000, (c) Re = 20 000; (d) Re = 30 000, (e) Re = 50 000.
Streamwise evolution of skewness for Re = 8000–50 000.
Streamwise evolution of flatness for Re = 8000–50 000.
Dependence of asymptotic value of S *and F *.
Centreline spectra Φ u of velocity fluctuation u between x/D e = 1 and x/D e = 10 for (a) Re = 8000, (b) Re = 12 000, (c) Re = 20 000, (d) Re = 30 000, (e) Re = 50 000.
Dependence of the Strouhal number St = f p D e /U j on Re. Note that the values of the St are those of f * that correspond to peaks of Φ u between x/D e = 2 and x/D e = 5 as indicated in Fig. 14 by the dashed lines.
Evolution of the centreline Φ u obtained at x/D e = 20, 30 and 40 in the form of fΦ u vs log (fY 1/2/U c ) for (a) Re = 8000, (b) Re = 12 000, (c) Re = 20 000, (d) Re = 30 000, (e) Re = 50 000.
Dependence of f * p = f p Y 1/2/U c on Re.
Reynolds number dependent spectra of the centreline u measured at x/D e = 30.
Compensated velocity spectra f m Φ u of the centreline u measured at x/D e = 30 for (a) m = 5/3, and (b) m = 1.31–1.56.
The R λ dependence of the power-law exponent of Φ u , all for x/De = 30.
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