FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Large-Eddy Simulation of Underexpanded Supersonic Swirling Jets |
WANG Guo-Lei, LU Xi-Yun** |
Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026 |
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Cite this article: |
WANG Guo-Lei, LU Xi-Yun 2012 Chin. Phys. Lett. 29 064704 |
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Abstract A large-eddy simulation of underexpanded supersonic swirling jets issuing into a quiescent environment was carried out for two typical swirl numbers. The corresponding nonswirling jet was also calculated for comparison and validation against the experimental data. The swirling effect on the various fundamental mechanisms that dictate the intricate flow phenomena, including flow features, shock cell structures, jet spreading characteristics and turbulence behaviors, was carefully analyzed, and it is found that the first shock cell length is reduced in the swirling jet in comparison with the nonswirling jet. A recirculation zone is formed in the high swirl number case, and the jet spreads quickly in the radial direction due to the swirling effect. Moreover, intensive turbulent fluctuations are generated along the jet shear layer and at the end of the jet potential core, which will be helpful in the mixing process. The obtained results provide a physical insight into understanding the mechanisms relevant to underexpanded supersonic swirling jets.
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Received: 16 January 2012
Published: 31 May 2012
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[1] Tam C K W 1995 Annu. Rev. Fluid Mech. 27 17 [2] Panda J and Seasholtz R G 1999 Phys. Fluids 11 3761 [3] Yu Y K, Chen R H and Chew L 1998 AIAA J. 36 1968 [4] Chen R H and Yu Y K 1999 AIAA J. 37 998 [5] Abdelhafez A and Gupta A K 2011 J. Propul. Power 27 117 % [6] Abdelhafez A and Gupta A K 2010 J. Propul. Power 26 754 % [7] Gany A, Mor M and Goldman C 2005 AIAA J. 43 2177 % [8] Lu X Y, Wang S W, Sung H G, Hsieh S Y and Yang V 2005 J. Fluid Mech. 527 171 [9] Li X D and Gao J H 2008 Phys. Fluids 20 035101 [10] Chen L W, Wang G L and Lu X Y 2011 J. Fluid Mech. 684 85 % [11] Abdelhafez A and Gupta A K 2009 AIAA paper 2009-1646 [12] Zemtsop C P, St鰈linger M K, Heinz S and Stanescu D 2009 AIAA J. 47 3011 [13] Chen L W, Xu C Y and Lu X Y 2010 J. Fluid Mech. 643 97 [14] Xu C Y, Chen L -W and Lu X Y 2010 J. Fluid Mech. 665 238 [15] Neemeh R, Algattus S and Neemeh L 1999 J. Sound Vib. 221 505 [16] Singh A and Chatterjee A 2007 Shock Waves 17 263 [17] Kearney-Fischer M, Kim J H and Samimy M 2009 Phys. Fluids 21 095101 % |
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