| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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The Effect of Mach Number on Turbulence Behaviors in Compressible Boundary Layers |
| WANG Li, LU Xi-Yun**
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Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026
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| Cite this article: |
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WANG Li, LU Xi-Yun 2011 Chin. Phys. Lett. 28 064702 |
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Abstract The effects of Mach number on turbulence behaviors are investigated by means of direct numerical simulation of compressible turbulent boundary layers with the free-stream Mach numbers 2, 4 and 6. Some typical turbulent quantities, including the velocity and vorticity fluctuations, intermittency, sweep and ejection events and turbulent kinetic energy budget, are analyzed. The turbulence intensities are significantly decreased with the increasing Mach number. The onset of intrinsic intermittency occurs nearer the wall for a higher Mach number. The ejection event is more frequent and the sweep event becomes less frequent. Moreover, the magnitudes of turbulent kinetic energy production, diffusion and transport terms are increased and the solenoidal dissipation is slightly decreased as the Mach number is increased.
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| Keywords:
47.27.Ek
47.27.Nb
47.40.Ki
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Received: 22 March 2011
Published: 29 May 2011
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| PACS: |
47.27.ek
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(Direct numerical simulations)
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47.27.nb
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(Boundary layer turbulence ?)
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47.40.Ki
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(Supersonic and hypersonic flows)
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[1] Maeder T, Adams N A and Kleiser L 2001 J. Fluid Mech. 429 187
[2] Li X L, Fu D X and Ma Y W 2006 Chin. Phys. Lett. 23 1519
[3] Martin M P 2007 J. Fluid. Mech. 570 347
[4] Duan L, Beekman I and Martin M P 2011 J. Fluid Mech. 672 245
[5] Guarini S E, Moser R D, Shariff K and Wray A 2000 J. Fluid Mech. 414 1
[6] Smits A J and Dussauge J P 2006 Turbulent Shear Layers in Supersonic Flow (New York: AIP)
[7] Willmarth W W and Lu S S 1972 J. Fluid Mech. 55 65
[8] Wang L and Lu X Y 2011 Chin. Phys. Lett. 28 034702
[9] Pirozzoli S, Grasso F and Gatiski T B 2004 Phys. Fluids 16 530
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