Volume 28 Issue 4
Apr.  2002
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LU Li-peng, LI Zhao-rui. Coherent Structures in Turbulent Boundary Layer with Adverse Pressure Gradients[J]. Journal of Beijing University of Aeronautics and Astronautics, 2002, 28(4): 417-419. (in Chinese)
Citation: LU Li-peng, LI Zhao-rui. Coherent Structures in Turbulent Boundary Layer with Adverse Pressure Gradients[J]. Journal of Beijing University of Aeronautics and Astronautics, 2002, 28(4): 417-419. (in Chinese)

Coherent Structures in Turbulent Boundary Layer with Adverse Pressure Gradients

  • Received Date: 06 Nov 2000
  • Publish Date: 30 Apr 2002
  • By using the idea of resonant triad of the theory of hydrodynamic stability, the coherent structures in a turbulent boundary layer were investigated as a function of steady-adverse-pressure-gradient(SAPG) and changing-adverse-pressure-gradient(CAPG) flow cases. It was found that the adverse pressure gradient enhanced the growth rate of the resonant triads, enlarged the parameter range for the growing cases, and reduced the streamwise dimension, while the spanwise spacing of the streaky structures in all four cases remained approximately the same. And the greater the adverse pressure gradient, the stronger the above effects. For CAPG flows, the case with reducing pressure gradient produced the strongest effect on the coherent structures, though the same pressure gradient was remained in the end of evolution.

     

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  • [1] Zhou Heng, Xiong Zhongmin. On the mechanism for the generation of the coherent structures in the wall region of a turbulent boundary layer[J]. Science in China(A), 1995,38(2):188~192. [2]Zhou Heng, Lu Lipeng. The effect of pressure gradient on the coherent structures in a turbulent boundary layer[J]. Science in China(A), 1997, 27(4):441~448. [3]Zhou H. Coherent structure modeling and its role in the computation of passive quantity transport in turbulent flows[J]. JSME, Series B, 1998,41(12):70~77. [4]Lu Lipeng,Chen Maozhang. A theoretical model for Reynolds-stress and dissipation-rate budgets in near-wall region[J]. Science in China(A), 2000,43(2):199~204. [5]Rood E P. Ship hydrodynamics basic research in the United States[J]. Journal of Hydrodynamics Series B, 1995(4):22~34. [6]Kline S J, Reynolds W C, Schraub F H. et al. The structure of turbulent boundary layers[J]. J Fluid Mech, 1967,30:741~773. [7]Unger F, Friedrich R. Coherent structures in favorable and adverse pressure gradient boundary layers. In:Advances in turbulence 3. Berlin:Springer-Verlag,1991.113~121.
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