Abstract
The flow field characteristics of a two-dimensional wall-attaching offset jet (WAOJ) are experimentally investigated by comparing with those of a turbulent plane wall jet(PWJ). The mean velocity, the turbulent stresses and triple velocity correlations are measured with a split film probe and anX wire probe. Even with the strong influence of the suction pressure field in the recirculation bubble at the lower corner, it is found that the WAOJ in the wall jet region has a close similarity with the PWJ. Especially, the decay of maximum velocity and the upper jet spread along the maximum velocity line of the WAOJ are virtually the same as those of the PWJ. The mean velocity profile of the WAOJ attains similarity after the jet impingement onto the lower plate. However the profiles of second and third-order moments of fluctuating velocities vary rapidly before the impingement and then relax very slowly to the similarity profiles of the PWJ.
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References
Bergeles, G. and Athanassiadis, N., 1983, “The Flow Past a Surface-Mounted Obstacle,” ASME J. of Fluid Engr., Vol. 105, pp. 461–463.
Bourque, C. and Newman, G., 1960, “Reattachment of a Two-Dimensional, Incompressible Jet to an Adjacent Flat Plate,” Aeron Quar., Vol. 11, pp. 201–232.
Cebeci, T. and Bradshaw, P., 1977, “Momentum Transfer in Boundary Layer,” McGraw-Hill, pp. 154–160.
Eaton, J. K., Jeans, A. H. and Johnston, J. P., 1979, “A Wall-Flow Direction Probe for Use in Separating and Reattaching Flows,” Trans. ASME, J. Fluid Engr., Vol. 101, pp. 363–366.
Everitt, K. W. and Robins, A. G., 1978, “The Development and Structure of Turbulent Plane Jets,” J. of Fluid Mech., Vol. 88, pp. 563–583.
Guitton, D. E., 1970, “Some Contributions to the Study of Equilibrium and Non-Equilibrium Wall Jets over Curved Surfaces,”, Ph. D. Thesis, McGill University.
Hoch, J. and Jiji, L. M., 1981, “Two-Dimensional Turbulent Offset Jet-Boundary Interaction,” ASME J. of Fluid Engr. Vol. 103 pp. 154–161.
Irwin, H. P. A. H., 1973, “Measurements in a Self-Preserving Plane Wall Jet in a Positive Pressure Gradient,” J. of Fluid Mech., Vol. 61, pp. 33–63.
Kiya, M. and Sasaki, K., 1983, “Structure of a Turbulent Separation Bubble,” J. of Fluid Mech., Vol. 137, pp. 83–113.
Kiya, M. and Sasaki, K., 1985, “Structure of Large-Scale Vortices and Unsteady Reverse Flow in the Reattaching Zone of a Turbulent Separation Bubble,” J. of Fluid Mech., Vol. 154, pp. 463–491.
Kline, S. J. and McClintock, F. A., 1953, “Describing Uncertainties in Single-Sample Experiments,” Mechanical Engr., Vol. 5, pp. 3–8.
Kumada, M., Mabuchi, I. and Oyakawa, K. 1973, “Studies in Heat Transfer to Turbulent Jets with Adjacent Boundaries (3rd Report Mass Transfer to Plane Turbulent Jet Reattachment on an Offset Parallel Plate),” Bull. of JSME, Vol. 16, pp. 1712–1722.
Morel, T., 1977, “Design of Two-Dimensional Wind Tunnel Contractions,” ASME J. of Fluid Engr., Vol. 99, pp. 371–378.
Nozaki, T., Hatta, K., Sato, N. and Matsumura, H., 1981, “Reattachment Flow Issuing from a Finite Width Nozzle (Report 2. Effects of Initial Turbulence Intensity),” Bull. of JSME, Vol. 24, pp. 363–369.
Parameswaran, V. and Alpay, S. A., 1975, “Studies on Re-Attaching Wall Jets,” Trans. CSME, Vol. 3, pp.83–89.
Pelfray, J. R. R., 1984, “Characteristics of a Turbulent Plane Offset Jet,” Ph.D. Dissertation, Mech. Engr. Dept. Clemson University.
Pelfray, J. R. R. and Liburdy, J. A., 1984, “Turbulent Characteristics of an Offset Jet,” 2nd International Symposium on Application of Laser Anemometry to fluid Mechanics.
Pelfray, J. R. R. and Liburdy, J. A., 1986a, “Mean Flow Characteristics of a Turbulent Offset Jet,” ASME J. of Fluid Engr., Vol. 108, pp. 82–88.
Pelfray, J. R. R. and Liburdy, J. A., 1986b, “Effect of Curvature on the Turbulence of a Two-Dimensional Jet,” Exp. Fluids, Vol. 4, pp. 143–149.
Persen, L. N., 1981, “The Near Feld of a Plane Turbulent Jet,” Fluid Dynamics of Jets with Application of V/STOL, AGARD Conference Proceedings, No. 308.
Pronchick, S. W., 1983, “An Experimental Investigation of the Structure of a Turbulent Reattaching Flow Behind a Backward-Facing Step,” Ph. D. Thesis, Dept. of Mech. Eng., Stanford University
Ra, S. H. and Chang, P. K. 1990, “Effects of Pressure Gressure Gradient on Reattaching Flow Downstream of a Rearward-Facing Step,” J. Aircraft, Vol. 27, pp. 93–95.
Ra, S. H., Chang, P. K. and Park, S. O., 1990a, “A Modified Calibration Technique for the Split Film Sensor,” Meas. Sci. Technol., Vol. 1, pp. 1156–1161.
Ra, S. H., Chang, P. K. and Park, S. O., 1990b, “Measurement of the Forward-Flow Fraction Using a Split Film Sensor,” Exp. Fluids Vol. 10, pp. 57–59.
Rajaratnam, N., 1976, “Turbulent Jets,” Elsevior Scientific Publishing Company, pp. 211–225.
Rajaratnam, N. and Subramanya, N., 1968. “Plane Turbulent Reattached Wall Jets,” ASCE J. of Hydraulics Div., Vol. 94, pp. 95–112.
Sawyer, R. A., 1960, “The Flow Due to a Two-Dimensional Jet Issuing Parallel to a Flat Plate,” J. of Fluid Mech., Vol. 9, pp. 543–560.
Sawyer, R. A., 1963, “Two-Dimensional Reattaching Jet Flows Including the Effect of Curvature on Entrainment,” J. of Fluid Mech., Vol. 17. pp. 481–498.
Spencer, B. W. and Jones, B. G., 1971, “Turbulence Measurements with the Split Film Anemometer Probe,” Proc. Symp. on Turbulence in Liquids, University of Missouri, Rolla. pp. 7–15.
Stock, D. E. and Jaballa, T. M., 1985, “Turbulence Measurements Using Split Film Anemometry,” Proc. Int. Symp. on Refined Flow Modelling and Turbulence Measurement (University of Iowa) H15-1-10.
Tritton, D. J., 1977, “Physical Fluid Dynamics,” Van Nostrand Reinhold Company, pp. 284–286.
Wilson, D. J. and Goldstein, R. J., 1976, “Turbulent Wall Jets with Cylindrical Streamwise Surface Curvature,” ASME J. of Fluid Engr., Vol. 98, pp. 550–557.
Yoo, J. Y., Kang, S. H., Chae, S. K. and Choa, S. H., 1986, “A Study on the Plane Turbulent Offset Jet,” Trans. of KSME, Vol. 10, No. 3, pp. 357–366.
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Yoon, S.H., Kim, K.C., Kim, D.S. et al. Comparative study of a turbulent wall-attaching offset jet and a plane wall jet. KSME Journal 7, 101–112 (1993). https://doi.org/10.1007/BF02954360
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DOI: https://doi.org/10.1007/BF02954360