Turbulent Surface Jet in Channel of Limited Depth
Publication: Journal of Hydraulic Engineering
Volume 115, Issue 12
Abstract
The synoptic behavior of a two‐dimensional turbulent surface jet is experimentally investigated. Single‐point hot‐film data were obtained for mean and root‐mean‐square velocities in the developing jet to a distance of 240 characteristic lengths downstream of the origin. The growth rates of the length and velocity scales are found to resemble more closely those observed in wall jets than those in free jets. The effects of jet confinement are to retard the ability of the jet to entrain fluid, to decrease the growth rate of the length scale, and to increase the decay rate of the velocity scale. Mean velocity‐profile similarity is still observed when the data is nondimensionalized with the reduced scales. Jet momentum will appear to have been lost due to momentum exchange with the return flow. An approximate analysis provides a means to estimate the momentum loss due to limited‐depth and is shown to correlate well with scale development in several jet configurations for these and prior experiments.
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References
1.
Chu, V. H., and Baddour, R. E. (1984). “Turbulent gravity stratified shear flows.” J. Fluid Mech., 138(Jan.), 353–370.
2.
Goldschmidt, V., and Eskinazi, S. (1966). “Two phase turbulent flow in a plane jet.” Trans. ASME, Series E, J. Appl. Mech., 33(4), 735–747.
3.
Guitton, D. E. (1970). “Some contributions to the study of equilibrium and nonequilibrium wall jets over curved surfaces.” Thesis presented to McGill University, at Montreal, Canada, in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
4.
Heskestad, G. (1965). “Hot wire measurements in a plane turbulent jet.” Trans. ASME, Series E, J. Appl. Mech., 32(4), 721–734.
5.
Hussian, A. K. M. F., and Clark, A. R. (1977). “Upstream influence on the near field of a plane turbulent jet.” Phys. Fluids, 20(9), 1416–1426.
6.
Kotsovinos, N. E. (1975). “A study of the entrainment and turbulence in a plane turbulent jet.” California Inst. Tech. Rept. KH R‐32, W. M. Keck Lab., Hydr. Water Resour., California Inst. of Tech., Pasadena, Calif.
7.
Kotsovinos, N. E. (1976). “A note on the spreading rate and virtual origin of a plane turbulent jet.” J. Fluid Mech., 77(Sept.), 305–311.
8.
Kotsovinos, N. E. (1978). “A note on the conservation of the axial momentum of a turbulent jet.” J. Fluid Mech., 87 (Jul.), 55–63.
9.
Launder, B. E., and Rodi, W. (1981). “The turbulent wall jet.” Progress in the Aerospace Sciences, Pergamon Press, Ltd., England, 19, 81–128.
10.
Miller, D. R., and Comings, E. W. (1957). “Static pressure distribution in the free turbulent jet.” J. Fluid Mech., 3 (Oct.), 1–16.
11.
Patel, R. P., and Newman, B. G. (1961). “Self‐preserving two‐dimensional turbulent jets and wall jets in a moving stream.” Report No. Ae5, Mech. Engrg. Dept., McGill Univ., Montreal, Canada.
12.
Rajaratnam, N. (1969). “Diffusion of a supercritical stream on a stagnant pool.” Trans. Engr. Inst. of Canada, 12(A‐1), 1–5.
13.
Rajaratnam, N. (1976). Turbulent jets. Elsevier Scientific Publishing Co., New York, N.Y.
14.
Rajaratnam, N., and Humphries, J. A. (1984). “Turbulent non‐buoyant surface jets.” Can. J. Hydr. Res., 22(2), 103–114.
15.
Ramaprian, B. R., and Chandrasekhara, M. S. (1985). “LDA measurements in plane turbulent jets.” J. Fluids Engrg., 107(2), 264–271.
16.
Ramberg, S. E., and Fung, Y. T. (1982). “A new stratified towing channel at NRL.” NRL Memorandum Report, 4829, Naval Res. Lab., Washington, D.C.
17.
Ramberg, S. E., Swean, T. F., Jr., and Plesniak, M. P. (1989). “Turbulence near a free surface in a plane jet.” NRL Memorandum Report, 6367, Naval Res. Lab., Washington, D.C.
18.
Reynolds, A. J. (1974). Turbulent Flows in Engineering, John Wiley & Sons, New York, N.Y., 404–405.
19.
Schneider, W. (1985). “Decay of momentum flux in submerged jets.” J. Fluid Mech., 154 (May), 91–110.
20.
Shlien, D. J. (1987). “Observations of dispersion of entrained fluid in the self‐preserving region of a turbulent jet.” J. Fluid Mech., 183 (Oct.), 163–173.
21.
So, R. M. C., Ahmed, S. A., and Yu, M. H. (1987). “The near field behavior of turbulent gas jets in a long confinement.” Exp. Fluids, 5(1), 2–10.
22.
Tailland, A., and Mathieu, J. (1967). “Jet Pariétal.” Journal de Mecanique, 6(103) (in French).
23.
Vanvari, M. R., and Chu, V. H. (1974). “Two‐dimensional turbulent surface jets of low Richardson number.” Tech. Report No. 74‐2[FML], Fluid Mech. Lab. Dept. of Civ. Engrg. and Appl. Mech., McGill Univ., Montreal, Canada.
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Copyright © 1989 ASCE.
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Published online: Dec 1, 1989
Published in print: Dec 1989
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