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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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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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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(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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