Interaction of Turbulence with Complex Shock Waves.

Abstract

Linear analysis and direct numerical simulation (DNS) are used to study the interaction of a shock wave with a turbulent flow. Effects central to shock wave/boundary layer interaction are identified and explained. The quantitative importance of the turbulence anisotropy and the shock oblique angle is demonstrated. Drop in Reynolds shear stress across a normal shock is shown. The implication for Reynolds stress models is discussed. The role of dilatational turbulent fluctuations on turbulence amplification is studied in detail. An explanation is suggested for lower amplification reported in wind-tunnel studies. Linear analysis & DNS are used to demonstrate the considerable influence of entropic fluctuations on turbulence evolution across a shock. Positive correlation between u' and T ' suppress amplification while negative correlation enhances it. Invalidity of Morkovin's hypothesis is demonstrated. A high order scheme is developed to allow strong shock/turbulence interaction. Results are presented for isotropic turbulence/normal shock interaction. (AN)

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Document Details

Document Type
Technical Report
Publication Date
Oct 25, 1994
Accession Number
ADA290225

Entities

People

  • Parviz Moin
  • Sanjiva K. Lele

Organizations

  • Stanford University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Waves
  • Acoustics
  • Boundary Layer
  • Computational Fluid Dynamics
  • Databases
  • Differential Equations
  • Euler Equations
  • Flow Fields
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Hugoniot Equations
  • Shock Waves
  • Stratified Fluids
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Fluid Mechanics and Fluid Dynamics.
  • Theoretical Analysis.