Numerical investigation of influence of co-flow velocity on plane jet

被引：0
|
作者：
He C. [1 ]
Lai H. [1 ]
机构：
[1] Key Lab of Pressurized Systems and Safety, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai
来源：
Lai, Huanxin (hlai@ecust.edu.cn) | 2006年 / Beijing University of Aeronautics and Astronautics (BUAA)卷 / 33期
关键词：
Co-flow velocity; High resolution; Jet; Large eddy simulation; Space-time correlation;
D O I：
10.13224/j.cnki.jasp.2018.08.024
中图分类号：
学科分类号：
摘要：
The characteristics of plane jet were investigated by large eddy simulation, at the outlet of plane jet Mach number of 0.9 and the co-flow velocity ratio of 0.1, 0.3 and 0.5, respectively. High resolution numerical method and Smagorinsky sub-grid scale model were used. The mean flow properties, fluctuations and the evolution of the vortical structures were analyzed. Result showed that with the growth of the co-flow velocity, the potential core length increased while the development of the shear layer was slowed down and the jet transition was delayed. The velocity distribution was self-similar, but possible similarity in the turbulence intensity was not found. Two-point space-time correlations of the velocity and pressure fluctuations in the shear layer were investigated. It was found that the increase of the co-flow velocity weakened the space-time correlations, but accelerated the spreads of fluctuations to the downstream. This study provides a basis for revealing the effect of co-flow velocity on the sound field. © 2018, Editorial Department of Journal of Aerospace Power. All right reserved.
引用
收藏
页码：2006 / 2015
页数：9
相关论文
共 20 条
  • [1] Goldschmidt V.W., Bradshaw P., Flapping of a plane jet, The Physics of Fluids, 16, 3, pp. 354-355, (1973)
  • [2] Datta A., Sinhamahapatra K.P., Investigation of the influence of co-flow velocity ratio on a compressible plane jet exhausting into parallel streams, Aerospace Science and Technology, 45, pp. 186-195, (2015)
  • [3] Brown G.L., Roshko A., On density effects and large structure in turbulent mixing layers, Journal of Fluid Mechanics, 64, 4, pp. 775-816, (1974)
  • [4] Sandberg R.D., Sandham N.D., Suponitsky V., DNS of compressible pipe flow exiting into a co-flow, International Journal of Heat and Fluid Flow, 35, 2, pp. 33-44, (2012)
  • [5] Li D., Space-time correlation in compressible turbulence and numerical investigation of the noise in mixing layers, (2013)
  • [6] Vreman B., Direct and Large-eddy Simulation of the Compressible Turbulent Mixing Layer, (1995)
  • [7] Larcheveque L., Sagaut P., Mary L., Et al., Large-eddy simulation of a compressible flow past a deep cavity, Physics of Fluids, 15, 1, pp. 193-210, (2003)
  • [8] Li Q., Numerical study of Mach number effects in compressible wall-bounded turbulence, (2003)
  • [9] Yee H.C., Sandham N.D., Djomehri M.J., Low-dissipative high-order shock-capturing methods using characteristic-based filters, Journal of Computational Physics, 150, 1, pp. 199-238, (1999)
  • [10] Sandham N.D., Yee H.C., Entropy Splitting for High order Numerical Simulation of Compressible Turbulence, (2001)
12