Nozzle aspect ratio effect on the mixing of Mach 2 elliptic free jet, issuing from convergent–divergent elliptic nozzles of aspect ratios 2, 3, and 4, in the presence of adverse and marginally favorable pressure gradients at the nozzle exit has been studied experimentally. The results show that AR4 jet enjoys better mixing than AR2 and AR3 jets at all nozzle pressure ratios. The AR2 and AR3 jets displayed axis switching, whereas there is no axis switching for AR4 jet. The shadowgraph shows that the waves in AR4 jet are weaker than those in AR2 and AR3 jets.
Issue Section:
Flows in Complex Systems
References
1.
Gutmark
, E. J.
, and Grinstein
, F. F.
, 1999
, “Flow Control With Noncircular Jets
,” Annu. Rev. Fluid Mech.
, 31
(1
), pp. 239
–272
.2.
Ho
, C. M.
, and Gutmark
, E.
, 1987
, “Vortex Induction and Mass Entrainment in a Small-Aspect Ratio Elliptic Jet
,” J. Fluid Mech.
, 179
, pp. 383
–405
.3.
Aravindh Kumar
, S. M.
, and Rathakrishnan
, E.
, 2016
, “Characteristics of Controlled Mach 2 Elliptic Jet
,” J. Propul. Power
, 32
(1
), pp. 121
–133
.4.
Aravindh Kumar
, S. M.
, and Rathakrishnan
, E.
, 2016
, “Characteristics of a Supersonic Elliptic Jet
,” Aeronaut. J.
, 120
(1225
), pp. 495
–519
.5.
Chauhan
, V.
, Aravindh Kumar
, S. M.
, and Rathakrishnan
, E.
, 2015
, “Mixing Characteristics of Underexpanded Elliptic Sonic Jets From Orifice and Nozzle
,” J. Propul. Power
, 31
(2
), pp. 496
–504
.6.
Verma
, S. B.
, and Rathakrishnan
, E.
, 1999
, “Flow and Noise Characteristics of Notched Elliptic-Orifice Jets
,” ASME J. Fluids Eng.
, 121
(3
), pp. 690
–693
.7.
Schadow
, K. C.
, Gutmark
, E.
, Koshigoe
, S.
, and Wilson
, K. J.
, 1989
, “Combustion-Related Shear-Flow Dynamics in Elliptic Supersonic Jets
,” AIAA J.
, 27
(10
), pp. 1347
–1353
.8.
Gutmark
, E.
, and Schadow
, K. C.
, 1987
, “Flow Characteristics of Orifice and Tapered Jets
,” Phys. Fluids
, 30
(11
), pp. 3448
–3454
.9.
Quinn
, W. R.
, 1989
, “On Mixing in an Elliptic Turbulent Free Jet
,” Phys. Fluids
, 1
(10
), pp. 1716
–1722
.10.
Hussain
, F.
, and Husain
, H. S.
, 1989
, “Elliptic Jets—Part I: Characteristics of Unexcited and Excited Jets
,” J. Fluid Mech.
, 208
, pp. 257
–320
.11.
Verma
, S. B.
, and Rathakrishnan
, E.
, 2001
, “Flow and Acoustic Properties of Underexpanded Elliptic-Slot Jets
,” J. Propul. Power
, 17
(1
), pp. 49
–57
.12.
Verma
, S. B.
, and Rathakrishnan
, E.
, 2003
, “Influence of Aspect-Ratio on the Mixing and Acoustic Characteristics of Plain and Modified Elliptic Slot Jets
,” Aerosp. Sci. Technol.
, 7
(6
), pp. 451
–464
.13.
Clement
, S.
, Murugan
, K. N.
, and Rathakrishnan
, E.
, 2005
, “Superiority of Elliptical Jets
,” J. Inst. Eng. (India)
, 86
, pp. 1
–7
.14.
Menon
, N.
, and Skews
, B.
, 2010
, “Shock Wave Configurations and Flow Structures in Non-Axisymmetric Underexpanded Sonic Jets
,” Shock Waves
, 20
(3
), pp. 175
–190
.15.
Chauhan
, V.
, Aravindh Kumar
, S. M.
, and Rathakrishnan
, E.
, 2016
, “Aspect Ratio Effect on Elliptical Sonic Jet Mixing
,” Aeronaut. J.
, 1
(1230
), pp. 1
–18
.16.
Rathakrishnan
, E.
, 2009
, “Experimental Studies on the Limiting Tab
,” AIAA J.
, 47
(10
), pp. 2475
–2485
.17.
Rathakrishnan
, E.
, 2010
, Applied Gas Dynamics
, Wiley
, Hoboken, NJ
.18.
Tam
, C. K. W.
, 1995
, “Supersonic Jet Noise
,” Annu. Rev. Fluid Mech.
, 27
(1
), pp. 17
–43
.Copyright © 2017 by ASME
You do not currently have access to this content.
