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TECHNICAL BRIEFS

The Shear Layers of a Two-Dimensional Jet Excited by Flexible Wires

[+] Author and Article Information
Ming-huei Yu, Yi-chun Liao, Chung-ho Tseng

Department of Mechanical Engineering, National Sun Yat-sen University, 804 Kaohsiung, Taiwan R.O.C.

J. Fluids Eng 125(3), 597-599 (Jun 09, 2003) (3 pages) doi:10.1115/1.1566045 History: Received November 26, 2001; Revised December 16, 2002; Online June 09, 2003
Copyright © 2003 by ASME
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References

Tong, C., and Warhaft, Z., 1994, “Turbulence Suppression in a Jet by Means of a Fine Ring,” Phys. Fluids, 6 (1).
Rajagopalan,  S., and Antonia,  R. A., 1998, “Turbulence Reduction in the Mixing Layer of a Plane Jet Using Small Cylinders,” Exp. Fluids, 25, pp. 96–103.
Vandsburger,  U., and Ding,  C., 1995, “Self-Excited Wire Method for the Control of Turbulent Mixing Layers,” AIAA J., 33, pp. 1032–1037.
Monkewitz,  P. A., and Sohn,  K. D., 1988, “Absolute Instability in Hot Jets,” AIAA J., 26, pp. 911–916.
Yu,  M. H., and Monkewitz,  P. A., 1990, “The Effect of Nonuniform Density on the Absolute Instability of Two Dimensional Jets and Wakes,” Phys. Fluids A, 2, pp. 1175–1181.
Sreenivasan,  K. R., Raghu,  S., and Kyle,  D., 1989, “Absolute Instability in Variable Density Round Jets,” Exp. Fluids, 7, pp. 309–317.
Monkewitz,  P. A., Bechert,  D. W., Barsikow,  B., and Lehmann,  B., 1990, “Self-Excited Oscillations and Mixing in a Heated Round Jet,” J. Fluid Mech., 213, pp. 611–639.
Yu,  M. H., and Monkewitz,  P. A., 1993, “Oscillation in the Near Field of a Heated Two-Dimensional Jet,” J. Fluid Mech., 255, pp. 323–347.

Figures

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Typical Schlieren image of the hot jet, (a) without wires (b) with two still wires at X=0.48 and Y=±0.5(Y=0 corresponds to the centerline of the jet on each Schlieren image), (c) with flexible wires, fn=37 Hz, (d) with flexible wires, fn=83 Hz
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Temperature spectra of the hot jet, temperature probe at X=2.4,Y=0.5, (a) without wires (b) with still wires at X=0.48 and Y=±0.5, (c) with vibrating wires, fn=37 Hz
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Temperature distributions along the centerline (a) mean values (b) temperature fluctuations
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Temperature distributions along the Y-direction, at X=3 (a) mean values (b) temperature fluctuations
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The jet-half width versus the X-coordinate

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