A two-dimensional air jet, heated at a density ratio of 0.8, under external forcing by flexible wires is investigated experimentally. In each shear layer of the hot jet flow, a wire of diameter 0.23 mm (0.015 jet width) is flexibly mounted along the spanwise direction. By flow visualization, temperature measurements, and spectral analysis, the study demonstrates that the wires have quite different effects on the jet flow depending on that the wires are motionless or vibrating in the flow, and the shear layers of the heated plane jet can be manipulated by means of flexible wires.
Issue Section:
Technical Briefs
1.
Tong, C., and Warhaft, Z., 1994, “Turbulence Suppression in a Jet by Means of a Fine Ring,” Phys. Fluids, 6(1).
2.
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
.3.
Vandsburger
, U.
, and Ding
, C.
, 1995
, “Self-Excited Wire Method for the Control of Turbulent Mixing Layers
,” AIAA J.
, 33
, pp. 1032
–1037
.4.
Monkewitz
, P. A.
, and Sohn
, K. D.
, 1988
, “Absolute Instability in Hot Jets
,” AIAA J.
, 26
, pp. 911
–916
.5.
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
.6.
Sreenivasan
, K. R.
, Raghu
, S.
, and Kyle
, D.
, 1989
, “Absolute Instability in Variable Density Round Jets
,” Exp. Fluids
, 7
, pp. 309
–317
.7.
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
.8.
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
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