Near Field Decay of Mach 2 Elliptical Jet in the Presence of Tangentially Injected Secondary Swirling Flow
(*) Corresponding author
This investigation explores the mixing promoting capability of tangentially injected secondary swirling flow on a Mach 2 elliptical jet issuing from an elliptical nozzle of aspect ratio 2. A detailed three-dimensional numerical analysis was carried out for the combination of different levels of pressure gradient at the nozzle exit and five swirl numbers. Reynolds-Averaged Navier-Stokes equation along with Shear Stress Transport model was solved to predict the flow filed. The presence of secondary swirling flow created large pressure gradient in the direction perpendicular to jet axis, resulting in enhanced mass entrainment leading to high spread of the controlled jet compared to the uncontrolled jet. Also, the secondary jet increased the turbulence level in the flow field for all the cases studied compared to that of free jet case, leading to a reduction in jet core length. The swirl number and the pressure gradient at the nozzle exit is found to have a strong effect on the core length reduction. A maximum of about 70% reduction in core length was achieved for nozzle pressure ratio 4 with secondary flow of swirl number 5.
Copyright © 2022 Praise Worthy Prize - All rights reserved.
E. Rathakrishnan, Applied Gas Dynamics (John Wiley & Sons, 2019).
Chih-Ming Ho and Ephraim Gutmark, "Vortex induction and mass entrainment in a small-aspect-ratio elliptic jet", J. Fluid Mech.vol. 179, 383-405(1987).
E. Gutmark, K. C. Schadow and K. J. Wilson, "Noncircular Jet Dynamics in Supersonic Combustion", J. Propul. Power 5(5), (1989).
V. Chauhan, S. M. Aravindh Kumar, and E. Rathakrishnan, "Elliptic jet control with cross-wire" Part G: J. Aerospace Eng.229(10), 2015.
V. Chauhan, S. M. Aravindh Kumar, and E. Rathakrishnan, "Mixing characteristics of underexpanded elliptic sonic jets from oriﬁce and nozzle," J. Propul. Power 31(2), 496-504 (2015).
V. Chauhan, S. M. Aravindth Kumar, and E. Rathakrishnan, "Aspect ratio effect on elliptical sonic jet mixing," Aeronaut. J. 120(1230), 1197 (2016).
S. M. A. Kumar and E. Rathakrishnan, "Characteristics of a supersonic elliptic jet," Aeronaut. J. 120(1225), 495 (2016).
S. M. A. Kumar and E. Rathakrishnan, "Characteristics of controlled Mach 2 elliptic jet," J. Propul. Power 32(1), 121-133 (2016).
S. M. A. Kumar and E. Rathakrishnan, "Nozzle aspect ratio effect on supersonic elliptic jet mixing," J. Fluids Eng. 139(10), 101103 (2017).
S. M. A. Kumar and E. Rathakrishnan, "Control of elliptic supersonic jet of aspect ratio 3," J. Aerosp. Eng. 30(5), 04017048 (2017).
A. Bajpai and E. Rathakrishnan, "Control of a supersonic elliptical jet", The Aeronautical Journal. 122(1247), 131-147(2017).
Saif Akram, Arun Kumar Perumal, and Ethirajan Rathakrishnan, "Effect of tab parameters on the near-field mixing characteristics of a Mach 1.5 elliptic jet", Phys. Fluids, 33,036114(2021).
T. H. New, "An experimental study on jets issuing from elliptic inclined nozzles", Experiments in Fluids, 46, pages1139-1157 (2009).
A. Nageswara Rao and Abhijit Kushari, "Underexpanded Supersonic Jets from Elliptical Nozzle with Aft Deck," J. Propul. Power 36(1), (2019).
Srisha M. V. Rao, S. K. Karthick, and Abhinav Anand, "Elliptic supersonic jet morphology manipulation using sharp-tipped lobes", Physics of Fluids 32, 086107 (2020).
W. G. Rose, "A Swirling Round Turbulent Jet: 1-Mean-Flow Measurements", J. Appl. Mech., 29(4): 615-625, (1962).
N. A. Chigier, A. Chervinsky, "Experimental Investigation of Swirling Vortex Motion in Jets", J. Appl. Mech., 34(2): 443-451, (1967).
S. Farokhi and R. Tagahvi, "Effect of initial swirl distribution on the evolution of a turbulent jet", AIAA J, 27(6), (1989).
Satoru Komori and Hiromasa Ueda, "Turbulent flow structure in the near field of a swirling round free jet", The Physics of Fluids 28, 2075 (1985).
K.K.J.Ranga Dinesh, K.W.Jenkins, A.M.Savill and M.P.Kirkpatrick, "Swirl effects on external intermittency in turbulent jets", International Journal of Heat and Fluid Flow, 33(1), (2012).
S. Gopinath, M. Sundararaj, S. Elangovan and E. Rathakrishnan, "Mixing Characteristics of Elliptical and Rectangular Subsonic Jets with Swirling Co-flow", International Journal of Turbo & Jet-Engines, 32(1), 2014.
Aleksei S. Lobasova Sergey V. Alekseenkoab Dmitriy M. Markovichab Vladimir M. Dulina, "Mass and momentum transport in the near field of swirling turbulent jets. Effect of swirl rate", International Journal of Heat and Fluid Flow Volume 83, (2020).
Hao Shen and Christopher K. W. Tam, "Numerical Simulation of the Generation of Axisymmetric Mode Jet Screech Tones", AIAA J Vol. 36, No. 10, 1998.
- There are currently no refbacks.
Please send any question about this web site to email@example.com
Copyright © 2005-2023 Praise Worthy Prize