Shock Waves pp 1119-1124 | Cite as

Computation of turbulent separated nozzle flows

  • Q. Xiao
  • H. M. Tsai
Conference paper


The computationally challenging case of an over-expanded nozzle flow involving shock induced boundary layer separation is examined in this paper. Comparative studies using a base line two-equation k − ω turbulence model with and without taking into account non-equilibrium effects are made. The additional equation (the lag equation) to model nonequilibrium effect for the eddy viscosity in the separated flow region, significantly improves predictions of shock induced separated flows in exhaust nozzle.


Turbulence Model Eddy Viscosity Separate Flow Reynolds Stress Model Nozzle Flow 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    S.C. Asbury, C.L. Gunther, C.A. Hunter: A passive cavity concept for improving the off-design performance of fixed-geometry exhaust nozzles. AIA A 96-2541 (1996)Google Scholar
  2. 2.
    C.A. Hunter: An Experimental Analysis of Passive Shock-boundary Layer Interaction Control for Improving the Off-design Performance of Jet Exhaust Nozzles. M.S. Thesis, The George Washington University JIAFS. (1993)Google Scholar
  3. 3.
    C.A. Hunter: Experimental, theoretical, and computational investigation of separated nozzle flows. AIAA 98-3107 (1998)Google Scholar
  4. 4.
    J.R. Carlson: A nozzle internal performance prediction method. NASA Technical Paper 3221 (1992)Google Scholar
  5. 5.
    M.E. Olsen, T.J. Coakley: The lag model, a turbulence model for non equilibrium flows. AIAA 2001-2564 (2001)Google Scholar
  6. 6.
    Q. Xiao, H.M. Tsai, F. Liu: Computation of transonic diffuser flows by a lagged k — ω turbulence model. Journal of Propulsion and Power 19(3), (2003)Google Scholar
  7. 7.
    F. Liu, S.H. Ji: Unsteady flow calculations with a multigrid Navier-Stokes method. AIAA Journal 34(10), 2047 (1996)ADSCrossRefGoogle Scholar
  8. 8.
    A. Jameson: Time dependent calculations using multigrid, with applications to unsteady flows past airfoils and wings. AIAA Paper 91-1596 (1991)Google Scholar

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • Q. Xiao
    • 1
  • H. M. Tsai
    • 1
  1. 1.Temasek LaboratoriesNational University of SingaporeSingaporeSingapore

Personalised recommendations