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TECHNICAL PAPERS

LDV Measurement of Confined Parallel Jet Mixing

[+] Author and Article Information
Robert F. Kunz, Stephen W. D’Amico, Peter F. Vassallo, Michael A. Zaccaria

Lockheed Martin, Schenectady, NY 12301

J. Fluids Eng 123(3), 567-573 (Jul 12, 2000) (7 pages) doi:10.1115/1.1383970 History: Received October 07, 1998; Revised July 12, 2000
Copyright © 2001 by ASME
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References

Newman,  B. G., Patel,  R. P., Savage,  S. B., and Tjio,  H. K., 1972, “Three-Dimensional Wall Jet Originating from a Circular Orifice,” Aeronaut. Q., 23, p. 188.
Launder,  B. E., and Rodi,  W., 1983, “The Turbulent Wall Jet-Measurements and Modelling,” Annu. Rev. Fluid Mech., 15, p. 429.
Davis,  M. R., and Winarto,  H., 1980, “Jet Diffusion From a Circular Nozzle Above a Solid Plane,” J. Fluid Mech., 101, Part 1, p. 201.
Holdeman,  J. D., and Foss,  J. F., 1975, “The Initiation, Development, and Decay of the Secondary Flow in a Bounded Jet,” ASME J. Fluids Eng., 97, Sept., p. 342.
Krothapalli,  A., Baganoff,  D., and Karamcheti,  K., 1981, “Partially Confined Multiple Jet Mixing,” AIAA J., 19, No. 3, p. 324.
Barnett, D., and Bentey, H., 1974, “Statistical Biasing of Individual Realization Laser Velocimeters,” Proceedings of the Second International Workshop on Laser Velocimetry, Purdue University, p. 428.
Patrick, R. W., 1987, “Flowfield Measurements in a Separated and Reattached Flat Plate Turbulent Boundary Layer,” NASA CR-4052, March.
Patterson, R. W., 1982, “Turbofan Forced Mixer-Nozzle Internal Flowfield, I-Benchmark Experimental Study,” NASA CR-3492, April.
Kunz, R. F., D’Amico, S. W., Vassallo, P. F., Zaccaria, M. A., Aksoy, H., and So, R. M. C., 1995, “LDV Measurement and Navier-Stokes Computation of Parallel Jet Mixing in a Rectangular Confinement,” AIAA Paper 95-2147.
Laufer, J., 1950, “Investigation of Turbulent Flow in a Two-Dimensional Channel,” NACA Report 1053, p. 1247.

Figures

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(a) Top view, (b) front view sketches of parallel confined jet test section
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Sketch of probe orientation and 12 scan locations
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Contours of measured axial velocity 0.027 m downstream from confinement inlet, illustrating the cross-stream resolution of scans in the measurement space
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(a) Energy spectrum of axial velocity taken at x=.0508 m,y=0.0 m,z=0.0 m; (b) Measured axial mean velocity versus y at x=.0508 m,z=0.0 m; (c) Measured axial mean velocity versus z for jet 3 at y=.2032 m for x=.0508 m (triangles) and .1016 m (squares)
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Measurements of axial velocity and normal stresses versus z at x=0.6604 m,y=0.2032 m. (a) Comparison of axial velocity with law-of-the-wall; (b) comparison of axial velocity with data due to Laufer 10; (c) comparison of normal stresses with data due to Laufer 10.
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Comparison of measured axial mean velocity in the jet 3 inlet pipe at x=−0.0667 m, with 1/7 power law profile
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Measured mean velocities, U and V. (a)–(j) are contour plots at x=0.0051, 0.0127, 0.0216, 0.0270, 0.0381, 0.0508, 0.0635, 0.0762, 0.1016, 0.1524 m, respectively. Experimental scan location grid is overlaid on contour plots. Two contour level bars for V velocity correspond to top four and bottom six scans, respectively. Figure 3 shows relative position of confinement wall and symmetry planes for these plots; (k) shows carpet plots of these data at x=0.0381 m.
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Measured axial distributions of jet 3 axial velocity decay (circles) and mass weighted average axial turbulence intensity (triangles)
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Carpet plots of measured axial and transverse intensities (m2 /s2 ). Left column: uu, right column: vv. (a)–(c) at x=0.0051, 0.027, 0.1016 m. Refer to Fig. 7 for key.
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Carpet plots of measured Reynolds stress, uv (m2 /s2 ). (a)–(c) at x=0.0051, 0.027, 0.1016 m. Refer to Fig. 7 for key.

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