Chinese Journal of Theoretical and Applied Mechani ›› 2008, Vol. 40 ›› Issue (3): 394-401.DOI: 10.6052/0459-1879-2008-3-2007-358

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The influence of the turbulent statistical characteristics by cone effect in a supersonic boundary layer

Ming Dong Jisheng Luo   

  1. Department of Mechanics, Tianjin University, Tianjin 300072, China Department of Mechanics, Tianjin University, Tianjin 300072, China
  • Received:2007-07-25 Revised:2007-11-22 Online:2008-05-25 Published:1900-01-01

Abstract: A spatial direct numerical simulation (DNS) was performed to study the turbulent statistical characteristics in the turbulent boundary layer on a blunt cone with an adiabatic wall at an oncoming Mach 2.5, zero angle of attack and the cone semi-angle of 5^{\circ} in this paper. The results were compared with the simulated cases of the supersonic turbulent boundary layer over a flat plate and the hypersonic turbulent boundary layer on a blunt cone at Mach 6, suggesting the influence of the turbulent statistics with the cone effect. The results showed that, the cone effect is significant on the mean temperature profile and the compressibility, but unimportant on the scaling velocity law, the distribution of Reynolds stress and the budget of turbulent kinetic energy.

Key words: DNS, zero angle of attack, adiabatic blunt cone turbulent boundary layer, turbulent statistical characteristics, cone effect